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

HOWE SOUND: GLACIAL FJORD

View from on high of the lovely glacial fjord that is Howe Sound.

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.

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.

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