Wednesday, 2 December 2020

DEEPLY GROOVY DORIPPE SINICA

A beautiful example of the decapod, Dorippe sinica, from Holocene deposits near Shizuoka, Japan. This regal fellow has a strongly sculptured carapace. He looks like he would have been quite the bruiser moving about on the seafloor looking for tasty snacks. He likely enjoyed just about any form of meat, potentially dining on fish, worms, eggs, squid, starfish or even a few of his slow-moving cousins.

The carapace is deeply grooved with conspicuous wart-like tubercles; anterolateral margin, between the base of the exorbital tooth and cervical groove, smooth, without tubercles or denticles.

The teeth on the lower orbital margin in the cluster. Carpus of cheliped distinctly granulated on the upper surface and with a conspicuous row of granules along the anterior margin. Though missing here, the merus of second and third pereiopods are almost cylindrical. (Türkay 1995). This specimen was collected and is the collection of the deeply awesome Takashi Ito of Japan

Tuesday, 1 December 2020

HYPHANTOCERAS ORIENTALE

A stunning example of the heteromorph ammonite, Hyphantoceras orientale macroconch. This beauty corresponds to 'Morphotype C' from Aiba (2017). 

The specimen is a handful at 136 mm and was lovingly prepared by the hand holding it, that of the talented José Juárez Ruiz.

This an adult specimen (not the juvenile stage) from Upper Santonian outcrops near Ashibetsu, Hokkaido, Japan.

Aiba published on a possible phylogenetic relationship of two species of Hyphantoceras (Ammonoidea, Nostoceratidae) earlier this year, proposing that a phylogenetic relationship may exist based on newly found specimens with precise stratigraphic occurrences in the Kotanbetsu and Obira areas, northwestern Hokkaido.

Two closely related species, Hyphantoceras transitorium and H. orientale, were recognized in the examined specimens from the Kotanbetsu and Obira areas. Specimens of H. transitorium show wide intraspecific variation in the whorl shape. The stratigraphic occurrences of the two species indicate that they occur successively in the Santonian–lowermost Campanian, without stratigraphic overlapping. 

The similarity of their shell surface ornamentations and the stratigraphic relationships possibly suggest that H.orientale was derived from H. transitorium. The presumed lineage is likely indigenous to the northwestern Pacific realm in the Santonian–earliest Campanian. Hyphantoceras venustum and H. heteromorphum might stand outside a H. transitorium–H. orientale lineage, judging from differences of their shell surface ornamentation.

Aiba, Daisuke. (2019). A Possible Phylogenetic Relationship of Two Species of Hyphantoceras (Ammonoidea, Nostoceratidae) in the Cretaceous Yezo Group, Northern Japan. Paleontological Research. 23. 65-80. 10.2517/2018PR010.

Monday, 30 November 2020

ANCIENT SEAS: HOKKAIDO

A very beautiful Lower Campanian block from Haroto, Hokkaido, Japan. This specimen contains an ancient undersea world at a glance.

The beautiful block you see here was prepared, photographed and is in the collections of José Juárez Ruiz. In it, you can see a lovely Pseudoxybeloceras (Parasolenoceras) soyaense (143 mm), Polyptychoceras jimboi (134 mm), Polyptychoceras sp. (114 mm), Gaudryceras mite (48 and 45 mm), Gaudryceras tenuiliratum (Hirano, 1978) at (48 and 20 mm), and a wee fragment of wood (69 mm).

Matsumoto published on the ammonites from the Campanian (Upper Cretaceous) of northern Hokkaido back in 1984, in the Palaeontological Society of Japan Special Series Papers, Number #27.

This was my first look at the glorious fauna from northern Japan. The species and preservation are truly outstanding. Since then, many of the Japanese palaeontologists have made their way over to Vancouver Island, to look at ammonites, inoceramids and coleoid jaws from the Nanaimo Group and compare them to the Japanese species.

Rick Ross and Pat Trask, both of Courtenay on Vancouver Island, collaborated with Dr. Kazushige Tanabe and Yoshinori Hikida of Japan, to produce a wonderful paper in the Journal of Paleontology, 82 (2), 2008, pp 398-408, on Late Cretaceous Octobrachiate Coleoid Lower Jaws from the North Pacific Regions. They compared eight well-preserved cephalopod jaws from Upper Cretaceous (Santonian and Campanian) deposits of Vancouver Island, Canada, and Hokkaido, Japan. Seven of these were from Santonian to lower Campanian strata of the Nanaimo Group in the northeastern region of Vancouver Island. The eighth specimen was from Santonian strata of the Yezo Group in the Nakagawa area, northern Hokkaido, Japan. 

While they were collaborating on identifying coleoid jaws from the Comox Valley, Rick was visited twice by Dr. Kazushige Tanabe who was joined by his colleague Akinori Takahashi. Takahashi is an expert on temporal species-diversity changes in Japanese Cretaceous inoceramid bivalves.

They had the very great pleasure of visiting many fossil sites and seeing personal and museum collections. If you'd like to read Matsumoto's paper, here is the link: http://www.palaeo-soc-japan.jp/download/SP/SP27.pdf  I have a pdf copy of the Coleoid paper from Rick. It has very nice photos and illustrations, including a drawing of the holotypes of Paleocirroteuthis haggerti n. gen. and Paleocirroteuithis pacifica.

Here's a link to one of Takahashi's papers: https://bioone.org/journals/paleontological-research/volume-9/issue-3/prpsj.9.217/Diversity-changes-in-Cretaceous-inoceramid-bivalves-of-Japan/10.2517/prpsj.9.217.short

Sunday, 29 November 2020

LATE JURASSIC PHYLLOCERAS

Phylloceras consanguineum (Gemmellaro 1876) a fast-moving carnivorous ammonite from Late Jurassic (Middle Oxfordian) deposits near Sokoja, Madagascar, off the southeast coast of Africa.

This classical Tethyan Mediterranean specimen is very well preserved, showing much of his delicate suturing in intricate detail. Phylloceras were primitive ammonites with involute, laterally flattened shells.

They were smooth, with very little ornamentation, which led researchers to think of them resembling plant leaves and gave rise to their name, which means leaf-horn. They can be found in three regions that I know of.  In the Jurassic of Italy near western Sicily's Rosso Ammonitico Formation, Lower Kimmeridgian fossiliferous beds of Monte Inici East and Castello Inici (38.0° N, 12.9° E: 26.7° N, 15.4° E) and in the Arimine area, southeastern Toyama Prefecture, northern central Japan, roughly, 36.5° N, 137.5° E: 43.6° N, 140.6° E. And in Madagascar, in the example seen here found near Sokoja, Madagascar, off the southeast coast of Africa at 22.8° S, 44.4° E: 28.5° S, 18.2° E.

Saturday, 28 November 2020

HAMASTAS: RITUALISTIC CANNIBALISM

Kwakiutl First Nations assert, when interrogated, that the practice of cannibalism only became general about a hundred years ago. 

Europeans who travelled in their territory were able to witness many of their ceremonial dances, Moffat, guided by First Nation informant, George Hunt, brought back first-hand information about the customs. 

They say that sometimes slaves were killed for the benefit of Hamatsas — the cannibal members of the Kwakiutl — and that at other times the Hamatsas contented themselves with snatching mouthfuls of flesh from their own tribesmen – usually from the chest and upper arms of well-fleshed individuals.

They vouch for an example of ritual cannibalism which took place near Fort Rupert. A Kwakiutl shot and wounded a slave, who ran away and collapsed on the beach at the water’s edge. He was pursued by the tribesmen, including a group of the ‘Bear Dancers’ and Hamatsas. 

The slave’s body was cut to pieces with knives while the Hamatsas squatted in a circle around them crying out their terrible cry: ‘Hap! Hap! Hap! Hap!

Helpless to intervene, Moffat and Hunt watched the Bear Dancers snatch up the flesh, warm and quivering, and growling like the Grizzly they represented, offer it to the Hamatsas in order of seniority.

The wife of the dead slave was at the time in Fort Rupert, and, like Hunt and Moffat, witnessed the slaughter of her husband, helpless to avert it. But she had a weapon that the white men did not possess: she could throw a curse over the Hamatsas.

I will give you five years to live,’ she shrieked at them from the walls of Fort Rupert. ‘The Spirit of your Dancing is strong, but my spirit is stronger still. You have killed my husband with knives; I shall kill you with the point of my tongue.’

Within five years of this episode, the white men report, every member of the tribe who had taken part in the killing of this slave was dead. In memory of the grim episode, a rock on the beach where the ritual feast took place was carved into the likeness of the Baxbakualanuxsiwae mask.

The tradition died hard. A Hamatsa demanded that another slave – this time a female – should dance for him. She stood a moment looking at him in terror, and said: ‘I will dance. But do not get hungry. Do not eat me!’ She had hardly finished speaking when her master, a fellow member of the tribe, split her skull open with an axe, and the Hamatsa thereupon began to eat her flesh. 

This actual Hamatsa was still alive towards the end of the nineteenth century, and on interrogation remarked, among other things, that it is very much harder to consume fresh human flesh than the dried flesh of corpses that have been left to mummify in the trees and then brought down to appease the Hamatsa’s hunger. 

He also said that it was common practice to swallow hot water after a mouthful of flesh taken from a living body, as it was believed that this would cause the inflammation of the wound made by the teeth. All cannibal tribes, of course, file their teeth to sharp points in order to deal more effectively with their food.

There was a variant of the practice whereby the returning Hamatsa ran riot among the members of his tribe, biting flesh from them. Sometimes he brought a corpse with him – that of a slave or some victim captured and killed for the purpose. He ate part of this corpse after his ceremonial dance was completed, but because this was the first corpse to be devoured by him since his initiation, it was prepared with extra elaborate care. 

One of the most important details was the removal of the skin at the wrists and ankles, for the Kwakiutls believed that to eat of either hand or foot would result in almost immediate death — so definitely taboo. 

Most recently, that is to say at the very end of the nineteenth century, it seems that the barbarous practices among the Kwakiutls had become modified to a very great extent: the ceremonial was retained, but symbolism played a larger and larger part in the ceremonial, replacing the physical act. For example, the late-nineteenth-century Hamatsa did not necessarily bite a mouthful of flesh from the chest or the arm. 

Instead, he caught a piece of skin between his teeth and sucked at it hard, to extract the taste of blood. Then, with a sharp knife, he would snip off a piece of skin and pretend to swallow it. However, instead of swallowing it in fact, he put it into his hair behind his ear, to lie there until the ceremonial dancing was over. Then it was returned to the owner, who was thus assured that a piece of his own skin would not eventually be used to his harm in some piece of witchcraft.

It was, as it were, the beginning of the end. From the horrors of that house on the mountainside in which Baxbakualanuxsiwae and his hideous attendants practised their fiendish rites, the customs of the Kwakiutls have been refined to a ritual dance with gestures hardly more dangerous than mime.

Reference: Garry Hogg, Cannibalism and Human Sacrifice, pp. 70-72.

Photo: https://lccn.loc.gov/2003652781; Curtis, Edward S., 1868-1952, photographer. Qagyuhl [Kwakiutl] village at [Tsaxis] Fort Rupert, Vancouver Island, British Columbia. c1914 November 13. LOT 12328-A

Friday, 27 November 2020

TSAXIS, FORT RUPERT: DEATH OF THE LAST SLAVE ON THE NORTH COAST

In the Pacific Northwest, slavery and slave trading was common practice recorded for hundreds of years and likely practised for thousands.

The British Empire abolished slavery in 1833. While it was illegal, its practice continued in various ways around the world.

In December 1946, the magazine The Beaver, now published as Canada's History Archive, interviewed Elizabeth Hunt Wilson, who grew up amongst slaves, slave traders, settlers and First Nations on the west coast of British Columbia, when slavery was still common practice. 

She recounted a tale of the murder of the last slave in her village — a man still held as a slave more than fifty years after its official abolishment — in the village of Tsax̱is, Fort Rupert on northern Vancouver Island, British Columbia, Canada.

The story holds special importance for me as she is the sister of my great-great-grandfather, William Hunt who married Annie Wilson (Kwagu’ł / Kwakiutl) — and my great-great-aunts and uncles — Sarah Edna Hunt Lyon, Emily Hunt, George Hunt (Ethnographer who worked with Franz Boas), Eli Fredrick Hunt, Mary (who died young), Robert James Jr. Hunt (died as a young man),  Jane Charity Hunt Cadwallader, Mary Hunt (named for the one who died), and Annie Hunt Spencer. 

Elizabeth was also the last surviving daughter of Robert Hunt and Mary Ebbetts — whom you may know as Anislaga or Anisalaga — the All-Mother. 

Robert Hunt had come to British Columbia in 1850 as an ambitious man. He worked first as a labourer, then postman and later worked his way up to run the Hudson's Bay Company's fort at Fort Rupert. 

Elizabeth's mother, Mary Ebbetts was born Asnaq of the Raven/Yéil phratry of the Gigalgam Kyinanuk Tlingit of Tongas and Larhtorh/Larhsail of Cape Fox. She was the daughter of Chief Keishíshk' Shakes IV and his wife, S’eitlin — a Deisheetaan (Gaanax.ádi) from Aan goon (Angoon), and granddaughter to the Head-Chief of Wrangell. She was a high-ranking daughter which made her the perfect bride. 

Anislaga married Robert Hunt of the Hudson's Bay Company at Fort Simpson at Lax-Kw'alaams on the Nass River while staying with the Tsimshian. 

They lived in the north then relocated to Fort Rupert where they had eleven children — seven daughters and four sons, including sweet Elizabeth.

Elizabeth was born into a time when Sir Anthony Musgrave was the governor of the united Colony of British Columbia and Sir. John A. Macdonald was Prime Minister of Canada.   

Macdonald, once been tepid on the question of the westward expansion of the Canadian provinces, became a zealot once in power. 

As Prime Minister, he became a strong supporter of a bi-coastal Canada and the commerce that would bring. Immediately upon Confederation, he sent commissioners to London who eventually negotiated the transfer of Rupert's Land and the North-Western Territory to Canada. 

It was expansion into the west that led to Elizabeth's parents meeting and marrying — a binding of two cultures.  

Macdonald wished to secure the colony of British Columbia and ensure his new nation had a Pacific outlet. Both Fort Victoria (est. 1843) and Fort Rupert (est. 1849-51) — were central to these plans. Once the fort was established, 600-700 First Nations from more than twenty lineages lived near the site. Once smallpox washed through the community, that number was closer to 300-350. 

Robert Hunt, now factor, and Anislaga left Fort Rupert in 1868 to run the Fort Simpson site for the HBC. They returned to Tsax̱is, Fort Rupert in 1872 in time to give birth to their daughter, Jane Charity in 1873.

Anislaga's Chilkat Naaxein woven for William Hunt
A few years earlier, in 1870, while Anislaga, Elizabeth's mother was giving birth to Elizabeth in Fort Simpson and during the first months of her young life, negotiations were being conducted to bring British Columbia into the Confederation. 

This was at a time when cannibalism, as part of slave or child sacrifices, was still common practice.

The politics of the rest of Canada were unknown to her as she worked and played as a young girl. Elizabeth grew up in the remote, windswept village of Tsax̱is, Fort Rupert, a community built above the clam filled tidal flats in Beaver Cove eleven kilometres south of Port Hardy. It was my home as a girl and I think back on my childhood there with great fondness and try to imagine it when Elizabeth was a girl. 

Growing up, the only thing that remained of the old Hudson's Bay Company (HBC) fort was the old chimney and the graveyard a wee bit further south of the main fort site. I grew up beside the graveyard and spent many happy days playing amongst their long lost souls.

The fort site is just up the hill past the main reserve as you head south. Most of the fort was destroyed in the early 1940s. When Elizabeth was a girl, she knew the fort during its heyday — a trading shop, offices,  kitchens, living quarters, blacksmith, hardens and livestock pens filled its high walls. 

The area was established as much for the fur trade as it was for the local coal mining deposits. The fort was built in a military fashion with an eighteen-foot wooden palisade, both inner and outer gates — naively built from green wood — and metal cannons. The fort was the centre of trade and many tales of local conflict — both settler and First Nation.

Local Kwakiutl warriors took shelter within its walls to guard against marauding braves. Robert and Anislaga had run a thriving business, but that slowly declined. A fire took four of the houses and one life in 1868 — foreshadowing its demise as an HBC fort. 

Her father, Robert Hunt, my great-great-great-grandfather, purchased it from the Hudson's Bay Company in 1873. 

Elizabeth also spent time in Alert Bay and twenty years up in Rivers Inlet with her husband Daniel Wilson, a hale Scot who loved the west coast and First Nation traditions. She witnessed and heard stories of Haida raids on the Tsimshian First Nation near Prince Rupert and Alaska's Annette Islands and Coast Salish along the coast of Vancouver Island and British Columbia — capturing slaves and seizing valuable goods to bring home to Haida Gwaii in the hold of their large and skillfully built red cedar war canoes imbued with spirits — each act fomenting retaliation by the First Nation clans targeted. 

Haida canoes were the perfect fishing and raiding crafts. They were hewn from a single carefully chosen red cedar, felled in the fall. The wood would be prepared by burning and carved over the winter into a dugout that paddled true and could hold as many as 40 warriors.

When Elizabeth was eight or nine, a year or two after the Indian Act of 1876 was enacted, some warriors of the Cowichan First Nations captured and killed the sister of a Kwagu’ł Chief at Tsax̱is, Fort Rupert. 

The Chief's wife had brothers who were incensed by the slaughter and planned their own. They paddled down to the Cowichan village, killed four Cowichan First Nation warriors. Vanquished, the brothers returned home, their canoe held the body of their murdered sister and four dismembered heads of the Cowichan First Nation mounted on spears — the only witnesses to their vengeance. A funeral was prepared to honour their lost sibling. A Cowichan woman who had been captured as a slave was dressed in finery and brought to the mortuary tree where the sister's remains were to be interned. Gifts were bestowed upon her for her journey to the burial site and once there, she was shot and killed.  

The banning of the potlatch by Canadian law came into effect in 1884. A few years after the ban, when she was twenty, one of her sisters told her of a potlatch held by a Chief of the Kwagu’ł that her sister had attended. Potlatches take time to prepare for as the lineage Chief would consult with the oldest members of the household group and everyone would be involved. Though the ban had come into effect, preparations would have been well underway and the date already set.

Part of those preparations was the amassing of food and gifts for those invited as guests. Ceremonial pieces would be carved, Coppers polished and plans for what to give — or what to destroy — as the outright destruction of property is the ultimate mark of rank. One of the most valuable items you could destroy as part of your property was slaves.   

The Kwakiutl had Hamastas, members chosen to embody the ancient cannibals of their ancestors and act out ritualized cannibalism, most often at potlatch celebrations. These ritualistic dances are passed down through the lineage and are still practised today.

Although it was long past the time when slavery had been formally outlawed, slavery was still practised along the coast and the last slave held by the Kwakiutl First Nations was serving at the celebrations. His master, the son of a Chief, stabbed him to death in a frenzy at the close of a potlatch. He would later serve jail time for the murder but come home fluent in English and well-thought-of by his peers for the adventures he had been on and for the great wealth he had dispatched, both in blankets and gifts and by the ultimate offering — the killing of a slave.

Elizabeth Hunt Wilson's husband was the accountant at one of the canneries in Rivers Inlet — possibly the Beaver Cannery. Alec Spencer would meet her when she came to Port Hardy on the Union Steamship. She would descend the vessel in her Hudson's Bay Company coat looking grand. Elizabeth Hunt Wilson fondly remembered as Aunt Lizzie died in 1954. The Vancouver Province ran a front line headline, "Fourth Coffin Ready, Aunt Lizzie Dies," to mark her departure. 

Elizabeth Hunt Wilson passed away as a widow with no children. She was an independent spirit. She kept a casket she was buried in was kept in her basement. Before she passed, Aunt Lizzie gave her casket to family members that had passed. This happened three times. Folk like Sally McMahon and Dusty would play funeral, taking turns being the departed while others sang hymns. When Aunt Lizzie passed Dusty inherited her house. 

References: The Beaver Magazine, Issue: December 1946. 

Note: The Beaver magazine was founded and published, during eras shaped by colonialism. Concepts such as racial, cultural, or gender equality were rarely, if ever, considered by the magazine or its contributors. In earlier issues, you find comments and terms now considered to be derogatory. It was originally published by the Hudson's Bay Company and is not partially funded by them and published by Canada’s History Society as Canadas History.

https://canadashistory.partica.online/.../flipbook/32/ / https://www.canadashistory.ca/archive

Photo One: The Beaver, 1946. Elizabeth Hunt Wilson (1870-1854). Her First Nation name at Fort Rupert was Whale-swimming-by or Tlahlemdalaokwaw; at 'Ya̱lis, Alert Bay, Cormorant Island amongst the 'Na̱mg̱is First Nation her name was Thunderbird or Kunkwunkulegye.

Elizabeth is wearing a Chilkat blanket woven for her by her mother, a Master Tlingit Weaver. Anislaga made a blanket for each of her children. The spruce root hat she is holding is of Kwakiutl design. Elizabeth called her mother Anain — and that she was born with the name Ansnaq — though is often called Anislaga or Anisalaga.

Photo Two: Chimney at the Hudson's Bay Fort, Tsax̱is, Fort Rupert, British Columbia. City of Vancouver Archives.

Note: Robert Hunt (1828-1893) and Mary Ebbetts (1823-1919). They had eleven children, seven daughters and four sons: Elizabeth Hunt (1870-1954; married Wilson), Emily (1852-1922), George (1864-1932), William (1866-1952), Eli Fredrick (1867-1936), Sarah Edna (1871-1948), Mary (1854-; who died young), Robert James Jr. (1874-1896; died a young man), Jane Charity (1873-1940; married Cadwalader), Mary (named for the one who died), and Annie (1856-1924; married Spencer — and had several children: Ann, Roy, Calvin, Allan, Stevens, Norman).

Note: Those living in Tsax̱is, Fort Rupert, British Columbia refer to themselves as Kwagu’ł, Kwakiutl or Kwakwa̱ka̱’wakw, speakers of Kwak'wala. The term Kwakwa̱ka̱’wakw is relatively recent in the lexicon and useful as a catchword for all the various Kwakwala speaking groups who were amalgamated from roughly twenty-five-plus local clans, each aligned to a singular familial Chief. Edward Curtis often labelled his photos Qagyuhl for his interpretation of Kwagu’ł.

Marabou: https://marabouatthemuseum.com/2019/03/28/the-story-box-franz-boas-george-hunt-and-the-making-of-anthropology-at-bgc/

The Story Box: https://www.bgc.bard.edu/exhibitions/exhibitions/88/the-story-box

Tuesday, 24 November 2020

HERMIT CRAB: REAL ESTATE TYCOONS

This little cutie is a hermit crab and he is wearing a temporary home borrowed from one of our mollusc friends. 

His body is a soft, squishy spiral that he eases into the perfect size shell time and time again as he grows. 

His first choice is always the empty shell of a marine snail but will get inventive in a pinch — nuts, wood, serpulid worm tubes, aluminium cans or wee plastic caps. 

They are inventive, polite and patient. 

You see, a hermit crabs' desire for the perfect bit of real estate will have them queueing beside larger shells — shells too large for them — to wait upon a big hermit crab to come along, discard the perfect home and slip into their new curved abode. This is all done in an orderly fashion with the hermit crabs all lined up, biggest to smallest to see who best fits the newly available shell. 

There are over 800 species of hermit crab — decapod crustaceans of the superfamily Paguroidea. Their lineage dates back to the Jurassic, 200 million years ago. Their soft squishy, weakly calcified bodies do not fossilize all that often but when they do the specimens are spectacular. Think of all the species of molluscs these lovelies have had a chance to try on — including ammonites — and all the shells that were never buried in sediment to become fossils because they were harvested as homes.  

On the shores of British Columbia, Canada, the hermit crab I come across most often is the Grainyhand hermit crab, Pagurus granosimanus

These wee fellows have tell-tale orange-brown antennae and olive green legs speckled with blue or white dots. 

In the Kwak̓wala language of the Kwakiutl or Kwakwaka'wakw, speakers of Kwak'wala, of the Pacific Northwest, a shell is known as x̱ala̱'is and gugwis means house on the beach. 

I do not know the Kwak’wala word for a hermit crab, so I will think of these cuties as x̱ala̱'is gugwis — envisioning them finding the perfect sized shell on the surf worn shores of Tsax̱is, Fort Rupert, Vancouver Island. 

Monday, 23 November 2020

WEYLA OF THE SUNRISE FORMATION

Weyla (Nielsen, 1963) New York Canyon, Nevada
A lovely example of the large bivalve, Weyla (Nielsen, 1963), from the earliest known Jurassic Ferguson Hill Member (Hettangian and Sinemurian) of the Sunrise Formation in the New York Canyon area of west-central Nevada, USA.

The end-Triassic mass extinction was global, severe, and accompanied by worldwide disturbance to carbonate ramp and platform sedimentation. We see the effects played out in the Ferguson Hill Member of the Sunrise Formation. These outcrops are the result of the earliest known Jurassic carbonate ramp produced in the back-arc basin along NE Panthalassa following the extinction event to determine the biotic constituents and timing of local ecological recovery.

The Ferguson Hill Member (Hettangian and Sinemurian) of the Sunrise Formation in the New York Canyon area of west-central Nevada, USA has a lovely counterpart in the Rockies of British Columbia, Canada, explored over three field seasons in the early 2000s before being closed off as a provincial park.

In the Hettangian, post-extinction biosiliceous sedimentation extended to the inner ramp, where an ooid and grapestone shoal marked the outermost extent of a narrow belt of carbonate sedimentation. An early recovery phase in the late Hettangian is characterized by widespread, laterally homogeneous, demosponge-dominated level-bottom sedimentation across the mid- to inner-ramp, in addition to limited trophic tiering (sessile epifaunal suspension-feeding and mobile infaunal deposit-feeding), substantial ramp aggradation, and poor settling conditions for competitive benthic colonizers (e.g., corals, crinoids, infaunal bivalves).

Within 1.6–2 Myr after the extinction (in the early Sinemurian), a late recovery phase is recognized by the appearance of epifaunal grazers (gastropods, echinoids) and suspension feeders (crinoids, solitary scleractinian corals), phototrophic microbialites (oncoids, and possibly photosymbionts within corals), and infaunal deposit or suspension feeders (bivalves).

Although the late recovery faunas included more trophic levels than pre-extinction carbonate ramp habitats, development and progradation of the first Jurassic carbonate ramp still relied heavily on sponge, microbialite, and abiotic mineralization.

Sunday, 22 November 2020

JURASSIC SUNRISE FORMATION OF NEVADA

The entrance to the Pliensbachian-Toarcian localities at Joker Peak and Mina Peak Members of the Sunrise Formation, Nevada, USA.

The Jurassic ammonites of this section were first studied by Dr. Paul Smith, past Chair of Earth and Ocean Sciences, University of British Columbia and more recently by Andrew Caruthers et al.

Caruthers and his team took a goodly look at the Early Jurassic coral fauna. It is nice to see the other marine invertebrates getting the attention they deserve. Caruthers is an interesting cat. He uses a combination of invertebrate palaeontology and isotope geochemistry to ponder the effects of paleoclimate change and mass extinction. He has turned his eye in recent years to the Paleozoic of the Michigan Basin AND he's based in Kalamazoo, MI. Yep, Kalamazoo.

Others have taken up the mantle of discovery from these sites. Pengfei Hou did his 2014 Masters thesis comparing the Sinemurian (Early Jurassic) stratigraphic sections of Last Creek, British Columbia and Five Card Draw, Nevada including a detailed taxonomic study from the Involutum Zone to the lower part of the Harbledownense Zone of the Sinemurian.

Saturday, 21 November 2020

ICHTHYOSAUR RIB SECTION

A tasty ichthyosaur block with three distinct vertebrae and some ribs just peeking out. You can see the edges of the ribs nicely outlined against the matrix of this lovely articulated block. This beauty is but one piece of a complete ichthyosaur found in situ in Middle Triassic (Anisian/Ladinian) outcrops in the West Humboldt Mountains, Nevada.

Ichthyosaurs are an extinct order of marine reptiles from the Mesozoic era. They evolved from land-dwelling, lung-breathing reptiles, they returned to our ancient seas and evolved into the fish-shaped creatures we find in the fossil record today.

They were visibly dolphin-like in appearance but seem to share some other qualities as well. These lovelies were warm-blooded and used their colouration as camouflage. The smaller of their lineage to avoid being eaten and the larger to avoid being seen by prey. Ichthyosaurs also had insulating blubber, a lovely adaptation to keep them warm in cold seas.

Over time, their limbs fully transformed into flippers, sometimes containing a very large number of digits and phalanges. Their flippers tell us they were entirely aquatic as they were not well-designed for use on land. And it was their flippers that first gave us the clue that they gave birth to live young; a hypothesis later confirmed by fossil embryo and wee baby ichy specimens.

We find their fossil remains in outcrops spanning from the mid-Cretaceous to the earliest Triassic. As we look through the fossils, we see a slow evolution in body design moving towards that enjoyed by dolphins and tuna by the Upper Triassic, albeit with a narrower, more pointed snout. 

During the early Triassic, ichthyosaurs evolved from a group of unidentified land reptiles that returned to the sea. They were particularly abundant in the later Triassic and early Jurassic periods before being replaced as a premier aquatic predator by another marine reptilian group, the Plesiosauria, in the later Jurassic and Cretaceous. 

Friday, 20 November 2020

HOPLOSCAPHITES NEBRASCENSIS


This sweet macroconch with her lovely oil-in-water colouring is a Hoploscaphites nebrascensis (Owen, 1852). This is the female form of the ammonite that has a larger shell than the male, or microconch.

Hoploscaphites nebrascensis is an upper Maastrichtian species and index fossil. It marks the top of ammonite zonation for the Western Interior. This species has been recorded from Fox Hills Formation in North and South Dakota as well as the Pierre Shale in southeastern South Dakota and northeastern Nebraska.

It is unknown from Montana, Wyoming, and Colorado due to the deposition of coeval terrestrial units. It has possibly been recorded in glacial deposits in Saskatchewan and northern North Dakota, but that is hearsay. 

Outside the Western Interior, this species has been found in Maryland and possibly Texas in the Discoscaphites Conrad zone. This lovely one is in the collection of the deeply awesome (and enviable) José Juárez Ruiz. A big thank you to Joshua DrSlattmaster J Slattery for his insights on this species.

Thursday, 19 November 2020

EUHOPLITES OF FOLKSTONE

Euhoplites Ammonite, Collection of José Juárez Ruiz
A beautiful Euhoplites ammonite from Folkstone, UK. Euhoplites is an extinct ammonoid cephalopod from the Lower Cretaceous, characterized by strongly ribbed, more or less evolute, compressed to inflated shells with flat or concave ribs, typically with a deep narrow groove running down the middle.

In some, ribs seem to zigzag between umbilical tubercles and parallel ventrolateral clavi. In others, the ribs curve forward from the umbilical shoulder and lap onto either side of the venter.

Its shell is covered in the lovely lumps and bumps we associate with the genus. The function of these adornments are unknown. I wonder if they gave them greater strength to go deeper into the ocean to hunt for food. 

They look to have been a source of hydrodynamic drag, likely preventing Euhoplites from swimming at speed. Studying them may give some insight into the lifestyle of this ancient marine predator. Euhoplites had shells ranging in size up to a 5-6cm. We find them in Lower Cretaceous, middle to upper Albian age strata. Euhoplites has been found in Middle and Upper Albian beds in France where it is associated respectively with Hoplites and Anahoplites, and Pleurohoplites, Puzosia, and Desmoceras; in the Middle Albian of Brazil with Anahoplites and Turrilites; and in the Cenomanian of Texas.

This species is the most common ammonite from the Folkstone Fossil Beds in southeastern England where a variety of species are found, including this 37mm beauty from the collections of José Juárez Ruiz.