Monday 24 July 2017
Sunday 23 July 2017
FRESH FISH CONNOISSEURS
Ammonites were a group of hugely successful aquatic molluscs that looked like the still extant Nautilus, a coiled shellfish that lives off the southern coast of Asia.
While the Nautilus lived on, ammonites graced our waters from around 400 million years ago until the end of the Cretaceous, 65 million years. Varying in size from millimeters to meters across, ammonites are prized as both works of art and index fossils helping us date rock.
While the Nautilus lived on, ammonites graced our waters from around 400 million years ago until the end of the Cretaceous, 65 million years. Varying in size from millimeters to meters across, ammonites are prized as both works of art and index fossils helping us date rock.
Saturday 22 July 2017
EQUUS FERUS CABALLUS
Small but majestic, these Icelandic horses have been bred to adapt perfectly to the rugged wilds of untamed Iceland. They hail from farther north, having been brought to Iceland by the Vikings.
One of the features of Icelandic horses is their small stature. Often mistaken for ponies, they are one of the oldest breeds of horses and while small, the registries do indeed list them as such. They boast a long life and an extra heavy double-layered coat, perfectly adapted to the harsh winter conditions of their homeland.
Friday 21 July 2017
Tuesday 18 July 2017
NAIKOON, HAIDA GWAII
A wreck with tales to tell at Naikoon in Haida Gwaii.
The islands have gone by many names. To the people who call the islands home, Haida Gwaii means “island of the people,” it is a shortened version of an earlier name, Haadala Gwaii-ai, or “taken out of concealment.”
Back at the time of Nangkilslas, it was called Didakwaa Gwaii, or “shoreward country.” By any name, the islands are a place of rugged beauty and spirit and enjoy a special place in both the natural and supernatural world.
Monday 17 July 2017
Friday 14 July 2017
REFLECTED LIGHT
Beautiful light reflected in the windows of buildings in the South of France. Look closely and you'll see that those buildings are constructed from fossiliferous limestone blocks with lovely Miocene sea shells embedded.
Thursday 13 July 2017
Wednesday 12 July 2017
Tuesday 11 July 2017
DEINOTHERIUM GIGANTEUM
Deinotherium giganteum |
This partial specimen of Deinotherium giganteum hails from Cerecinos de Campos, Zamora from the Middle-Upper miocene (c. 15.97-5.33 Million Years)
The genus Deinotherium could reach a height of over 3.5 meters. Its structure and size are similar to those of the present-day elephant. Deinotherium first appeared approximately 17 million years ago and became extinct relatively recently, just 1.6 million years ago.
One of the distriguishing features of Deinotherium is their curved tusks inserted only in the jaw. One of the tusks from this fellow, on display at the Museo Nacional De Ciencias Naturales in Madrid, Spain, while incomplete, was preserved rather nicely and shows the detail of where the tusk meets the jaw.
Saturday 8 July 2017
MUIR WOODS, CRICKET THERMOMETER
Out in the woods and wondering what the temperature is? Slip down to the nearest stand of deciduous trees to search for the wee Snowy Tree Cricket, Oecanthus Fultoni, part of the order orthoptera.
Snowy Tree Crickets and their cousins double as thermometers and wee garden predators, dining on aphids and other wee beasties. Weather conditions, both hot and cold, affect the speed at which they rub the base of their wings together and consequently regulate their rate of chirping.
Listen for their tell-tale high pitch triple chirp sound in the early evening. Being in Canada, our crickets chirp in Celsius. Simply count the number of chirps over a seven second period and add five to learn your local temperature.
If didn't bring your calculator with you into the woods and you're still operating in old-skool Fahrenheit use this handy conversion. Double the temperature in Celsius, add 32 you'll get the approximate temperature in Fahrenheit.
This beautiful photo of Muir Woods outside San Francisco is by Aussie photographer, Paul McClure.
Snowy Tree Crickets and their cousins double as thermometers and wee garden predators, dining on aphids and other wee beasties. Weather conditions, both hot and cold, affect the speed at which they rub the base of their wings together and consequently regulate their rate of chirping.
Listen for their tell-tale high pitch triple chirp sound in the early evening. Being in Canada, our crickets chirp in Celsius. Simply count the number of chirps over a seven second period and add five to learn your local temperature.
If didn't bring your calculator with you into the woods and you're still operating in old-skool Fahrenheit use this handy conversion. Double the temperature in Celsius, add 32 you'll get the approximate temperature in Fahrenheit.
This beautiful photo of Muir Woods outside San Francisco is by Aussie photographer, Paul McClure.
Friday 7 July 2017
Thursday 6 July 2017
SCAPHOPODA: TUSK SHELLS
The Oligocene Lincoln Creek Formation has produced several dozen different species of infaunal molluscs, burrowing worms and is well-known for crabs.
This specimen is from the massive, tuffaceous siltstone and sandstone that runs through the town of Porter on the east side of the road.
The fossil-rich bedding planes are well-exposed with concretionary beds throughout.
Collecting was possible in the late 1990’s and early 2000’s but may be forbidden (or heavily discouraged today) as the site is on a busy roadway. I made multiple trips to Porter back in the day with folk from Vancouver and Washington State. The primary focus in the early 2000’s were the crabs. They were just in the early stages of being written-up and much excitement surrounded them.
But to each his own -- as it happens, this wee tusk shell is one of my favourite fossils from the site as my trips to Porter were focused mainly on the molluscs.
Tusk shells, are members of a class of shelled marine mollusc with a global distribution. Shells of species within this class range from about 0.5 to 15 cm in length. This fellow is 8 cm end to end, so near smack dab in the centre of his cohort.
The Scaphopoda get their nickname "tusk shells" because their shells are conical and slightly curved to the dorsal side, making the shells look like tiny tusks (picture a walrus or mammoth tusk in your mind’s eye). The scientific name Scaphopoda means "shovel foot," a term that refers to the "head" of the animal, which lacks eyes and is used for burrowing in marine sediments.
The most distinctive feature of scaphopods, however, and one that differentiates them from most molluscs, is the duo openings on their tubular shells. Most molluscs are open at just one end.
We could call scaphopods the great deniers. They live their adult lives with their heads literally buried in the sand. A tiny bit of their posterior end sticks up into the seawater for water exchange. Water is circulated around the mantle cavity by the action of numerous cilia.
This specimen is from the massive, tuffaceous siltstone and sandstone that runs through the town of Porter on the east side of the road.
The fossil-rich bedding planes are well-exposed with concretionary beds throughout.
Collecting was possible in the late 1990’s and early 2000’s but may be forbidden (or heavily discouraged today) as the site is on a busy roadway. I made multiple trips to Porter back in the day with folk from Vancouver and Washington State. The primary focus in the early 2000’s were the crabs. They were just in the early stages of being written-up and much excitement surrounded them.
But to each his own -- as it happens, this wee tusk shell is one of my favourite fossils from the site as my trips to Porter were focused mainly on the molluscs.
Tusk shells, are members of a class of shelled marine mollusc with a global distribution. Shells of species within this class range from about 0.5 to 15 cm in length. This fellow is 8 cm end to end, so near smack dab in the centre of his cohort.
The Scaphopoda get their nickname "tusk shells" because their shells are conical and slightly curved to the dorsal side, making the shells look like tiny tusks (picture a walrus or mammoth tusk in your mind’s eye). The scientific name Scaphopoda means "shovel foot," a term that refers to the "head" of the animal, which lacks eyes and is used for burrowing in marine sediments.
The most distinctive feature of scaphopods, however, and one that differentiates them from most molluscs, is the duo openings on their tubular shells. Most molluscs are open at just one end.
We could call scaphopods the great deniers. They live their adult lives with their heads literally buried in the sand. A tiny bit of their posterior end sticks up into the seawater for water exchange. Water is circulated around the mantle cavity by the action of numerous cilia.
When the available dissolved oxygen runs low for this fellow he ejects water from the yop end of his shell by contraction of his "foot."
Monday 3 July 2017
Friday 30 June 2017
Tuesday 27 June 2017
Monday 26 June 2017
Sunday 25 June 2017
Tuesday 20 June 2017
GROUSE GRIND: RITE OF PASSION
Vancouver, Canada's third-largest metropolis, is home to many natural wonders. One of these is the Grouse Grind hiking trail. Here, steps shrouded in mist invite you to test your mettle against one of our hallmark rites of passion.
Monday 19 June 2017
MISTER FINALLY: PERCHED
Sunday 18 June 2017
FALCO LINNAEUS
Reaching speeds of over 320 km/h (200 mph) Peregrine falcons (Falco peregrinus), are exquisite birds of prey. They are worthy predators in the air and one of the fastest moving creatures on the planet. I've had the great honor to work with several of these amazing creatures and can personally attest to both their speed and quirky yet charming personalities.
Highly adaptable to hot and cold temperatures, they boast a breeding range that stretches from the icy cold Arctic tundra to the searing Tropics.
We've had Peregrines on this beautiful big blue planet since the Late Miocene (with closely related Raptors as early as the Eocene). Sadly, the Peregrine Falcon was added to the endangered species list back in the 1970's after their population took a beating from food sources contaminated with pesticides, DDT being the main culprit. With the ban of DDT and active breed and release programs, their numbers have significantly increased. Score one for humans being thoughtful of those we share this planet with.
Friday 16 June 2017
OF SNOW AND ICE
While some of our ancestors were making a living in what is now Europe, they were pressed between the permanent ice fields that covered all of Scandinavia and the mountains of the Pyrenees and Alps.
Much of our present-day oceans was locked up in vast ice sheets, lowering the sea level by as much as a hundred metres lower than it is today.
It was a time of scarcity and risk. Cave bears, Ursus spelaeus, at once a food source and skilled predator, enjoyed the same hunting grounds, similar prey and competed for many of the same shelters. Cave hyena, Crocuta spelaea, also looked to these shelters and while smaller, were encountered as packs.
Beyond days filled with an endless search for food, primarily through scavenging off the kills of hyena and others, there was also the no-small-feat of checking well-situated caves for other, rather scary, inhabitants.
Large prey could be taken down by an organized hunt. Wooly rhinoceros, Coelodonta antiquitatis, and majestic Irish Elk, Megaloceros giganteus, being two of the most prized.
For many, there was a regular cycle of gathering mollusks, seaweed, and birds eggs at the shoreline and picking the fungi and other small offerings from the woodland areas. Once an area had been harvested, the nomadic life continued, with groups moving from camp to camp and participating in organized annual hunts.
Nomadic groups gathered peacefully at places where large herds of bison, reindeer or other hard to hunt beasties were forced into a narrow channel to cross a mountain, river or stream. I'm impressed by this. Both at the organization of such large hunts and by the lack of evidence of warring between nomadic groups when scarcity was the norm.
Wednesday 14 June 2017
Sunday 11 June 2017
Tuesday 6 June 2017
ICE AGE PROBOSCIDEANS
This disarticulated fellow is Mammutus primigenius from the Pleistocene of Siberia, Russia. He's now housed in the Museo Nacional De Ciencias Naturales in Madrid, Spain in a display that shows thoughtful comparisons between the proboscideans. They have a wonderful display of mammoth teeth, the diagnostic flat enamel plates and the equally distinct pointy cusped molars of the mastodons.
He was a true elephant, unlike his less robust cousins, the mastodons. Mammoths were bigger (both in girth and height), weighing in at a max of 13 tonnes. They roamed widely in the Pliocene to Holocene, covering much of Africa, Europe, Asia and North America.
We see them first some 150,000 years ago from remains in Russia. They enjoyed a very long lifespan of 60-80 (up to 20 years longer than a mastodon and longer than modern elephants) and quite surprisingly, at least to me, the last mammoth died just 3,700 years ago in the icy frost of a small Alaskan island.
Not all had the shaggy coat of long hair we picture them with. But all of these behemoth proboscideans boasted long, curved tusks, big ears, short tails and grazed on leaves, shrubs and grasses.
So why the tusks? Likely for displays of strength, protecting their delicate trunks, digging up ground vegetation and in dry riverbeds, digging holes to get at the precious life-giving water. It's a genius design, really. A bit like having a plough on the front of your skull.
So why the tusks? Likely for displays of strength, protecting their delicate trunks, digging up ground vegetation and in dry riverbeds, digging holes to get at the precious life-giving water. It's a genius design, really. A bit like having a plough on the front of your skull.
Sunday 4 June 2017
Thursday 1 June 2017
CRETACEOUS SPINE LIZARD
Spinosaurus was a huge carnivorous theropod dinosaur who lived in the swamps of North Africa during the upper Albian to upper Turonian stages of the Cretaceous, some 112 to 93.5 million years ago.
Larger even than some Tyrannosaurus and Giganotosaurus, this fellow weighed up to 21,000 kg and with all that mass was still an accomplished swimmer.
Larger even than some Tyrannosaurus and Giganotosaurus, this fellow weighed up to 21,000 kg and with all that mass was still an accomplished swimmer.
Wednesday 31 May 2017
RADIOLARIAN TIMEKEEPERS
Anthocyrtium hispidum Haeckel |
Radiolarians are unicellulars, wee little things with a diameter of 0.1–0.2 mm.
They produce intricate mineral skeletons, typically with a central capsule dividing the cell into the inner and outer portions of endoplasm and ectoplasm.Their beautifully elaborate mineral skeletons are usually made of silica. We find radiolaria as zooplankton throughout the ocean and their skeletal remains make up a large part of the cover of the ocean floor as siliceous ooze.
Due to their rapid turnover of species, they represent an important diagnostic fossil from the Cambrian onwards. Because they occur in continuous and well-dated sequences of rock, they act like a yardstick, helping geologists accurately date rock from around the globe.
In the Upper Triassic rocks, which predate the Triassic / Jurassic Mass Extinction event by about 10 million years, radiolarians are preserved in hundreds of forms. Just above them, in the early Jurassic rock layers laid down about the time of the great die-offs, only a fraction of the previous number of forms are represented. The more recent Jurassic rock shows a rebound of radiolarian diversity, though of course, in different forms, a diversity which continues to flourish and expand in today’s oceans.
Photo: Anthocyrtium hispidum Haeckel, magnification: 400x, bright field (negative image), stacked image Fundort / Site: Barbados Alter / Age: approx. 32-35 million years (late Eocene - early Oligocene) Präparation / Preparation: Andreas Drews
Tuesday 30 May 2017
CRETACEOUS DINOSAUR TRACKWAY
After an exciting hike in the dark through the woods and down a steep incline, we reached the river.
The tracks in this photo are from a type of armored dinosaur that date from the very end of the Cretaceous, between 68-66 million years ago.
Imagine a meandering armored tank munching on ferns and low-growing vegetation.
This is a photograph of an ankylosaur trackway filled with water and lit by lamplight along Wolverine River, a research site of Lisa Buckley, one of two magnificent paleontologists working in the area.
Some of the prints contain skin impressions, which is lucky as many of the prints are so shallow that they can only be recognized by the skin impressions.
There are two types of footprints at the Wolverine River Tracksite, the meat-eating theropods (at least four different sizes) and the slow, lumbering plant-eating ankylosaurs.
Filling the prints with water and using light in a clever way was a genius idea for viewing tracks that are all but invisible in bright sunlight by day.
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