Thursday 23 September 2004

STORM COMING DOWN

Like most mountainous areas, Bowron makes its own weather system and it appears you get everything in a 24-hour period. In fact, whatever weather you are enjoying seems to change 40 minutes later; good for rain, bad for sun. Wisps of cloud that seemed light and airy only hours early have become dark. Careful to hug the shore, we are ready for a quick escape from lightening as thundershowers break.

Friday 10 September 2004

SLOTHS AND BLUE GREEN

Ever wonder why the slow moving sloth has a slightly greenish hue? Ever consider the sloth at all? Well, perhaps not. Location, location, location, is the mantra for many of us in our macro world, but it is also true for the small world of algae.

Blue green algae is a term used to describe any of a large, heterogeneous group of prokaryotic, principally photosynthetic organisms. These little oxygenic (oxygen-producing) fellows appeared about 2,000,000,000 to 3,000,000,000 years ago and are given credit for greatly increasing the oxygen content of the atmosphere, making possible the development of aerobic (oxygen-using) organisms.

But all this heavy breathing aside, we go back to sloths and the wonder of making do where you are. The sloth's body and shaggy coat, or pelage, provides a comfy habitat to two types of wee blue-green algae along with various other invertebrates. The hairs that make up the sloth's coat have grooves that help foster algal growth.

And, while Kermit the Frog says, "it's not easy being green," it couldn't be further from the truth for this slow-moving tree dweller. The blue-green algae gives the sloth a natural greenish camouflage, an arrangement that is certainly win-win.

Thursday 2 September 2004

Saturday 28 August 2004

Saturday 3 July 2004

Saturday 15 May 2004

Saturday 24 April 2004

Wednesday 21 April 2004

Saturday 13 March 2004

Tuesday 3 February 2004

Sunday 4 January 2004

Monday 20 October 2003

Monday 13 October 2003

Thursday 2 October 2003

Tuesday 23 September 2003

Tuesday 9 September 2003

OH, SHE'S A BEAUTY :: CASTLE PEAK NORTH OF GOLDBRIDGE


Castle Peak, the glorious landmark and loadstone of basalt that marks the spot on our Jurassic/Triassic paleo adventures...

Thursday 4 September 2003

Friday 4 July 2003

Thursday 15 May 2003

Friday 9 May 2003

Friday 2 May 2003

Monday 21 April 2003

VIEIL AIX

WHEN THE TIDE IS OUT THE TABLE IS SET


Have you ever watched salmon jump, twist and leap their way past the many hurtles to return to their place of birth to spawn?

We are all familiar with the image of salmon returning to fresh water, to the rivers of their youth, to spawn and complete their lifecycle, in fact, it is one of the staple images of British Columbia. As adults, we bring our children to witness this cycle, rushing to the banks of our local rivers to watch as the adults, keen in their fight for reproduction and survival, struggle to complete their epic journeys against currents and predators. Arriving as they do, year upon year, season upon season, it seems to us that this is how it has been since time immemorial.

But we now have evidence that migration to the sea may be a relatively recent behaviour. Fossil beds at Driftwood Canyon, near Smithers, contain large numbers of fossil salmonid remains from the Eocene age, approximately 45 million years ago. What is interesting is that the fossil beds are filled equally with both juvenile and larger adults.

If these salmon were heading off to sea in their juvenile form and returning to spawn as adults we would expect to find an abundance of larger carcasses in the lake sediments and relatively few juveniles. Given the equal numbers, we can conclude that the salmonids of the Eocene, lived out their lifecycle as a landlocked species, the way Kokanee do today.

Thursday 20 February 2003

Sunday 9 February 2003

GRIZZLY & BLACK BEARS

Both grizzly and black bears descend from a common ancestor, Ursavus, a bear-dog the size of a raccoon who lived more than 20 million years ago. Seems an implausible lineage given the size of their large descendents.

Monday 3 February 2003

Friday 24 January 2003

Wednesday 18 December 2002

FOSSILS OF THE OLYMPIC PENINSULA

This lovely Lower Miocene nautiloid is Aturia angustata collected on the foreshore near Clallam Bay, Olympic Peninsula, northwestern Washington. 

I have been exploring Washington State for many years. It is rugged, windswept and has amazing fossil exposures all along its northern edge. The area goes by the name of the Olympic Peninsula and it is a wilderness playground. The sites I usually visit are Majestic Beach for its rare but prized fossil whale bone.

Further west are the beach exposures that have fossil echinoids in matrix and Ghost shrimp claws in concretion. There is a clay mine that holds wonderful nautiloids like the creamy Aturia you see here. Sometimes they are cemented together and come out whole. Sometimes calcified and show yellow, brown and white when you hold them to the light. Further up are the beach exposures along Clallam Bay.

Aturia is an extinct genus of Paleocene to Miocene nautilids within Aturiidae, a monotypic family, established by Campman in 1857 for Aturia Bronn, 1838, and is included in the superfamily Nautilaceae in Kümmel, 1964.

Aturia is characterized by a smooth, highly involute, discoidal shell with a complex suture and subdorsal siphuncle. 

Their shells are rounded ventrally and flattened laterally; the dorsum is deeply impressed. The suture is one of the most complex within Nautiloidea. It has a broad flattened ventral saddle, narrow pointed lateral lobes, broad rounded lateral saddles, broad lobes on the dorso-umbilical slopes, and a broad dorsal saddle divided by a deep, narrow median lobe. 

The siphuncle is moderate in size and located subdorsally in the adapical dorsal flexure of the septum. Based on the feeding and hunting behaviours of living nautiluses, Aturia most likely preyed upon small fish and crustaceans. It is well worth exploring the exposures at Clallam Bay. The local clay quarry is on private land so you would need to seek permission. I have also seen calcified beauties of this species collected from river sites within the Olympic Peninsula range, though I have not explored these myself.

Friday 15 November 2002

INSPIRATION: MOR-PHAR

What inspires us to explore the world? Sometimes it is the area in which we live, the encouragement of those we love blended with a natural curiosity. The two pivital players in my life were and are my grandfather and father. Both wonderful naturalists in their own right. The world was our playground.

That legacy carries on in the like-minded community of those I write, kayak and fossil collect with. Amazing people who fill me with wonder as they take in the beauty, rugged strength and delicate balance of this imperfect yet utterly perfect world.

Wednesday 19 June 2002

Wednesday 5 June 2002

FOSSIL COLLECTING 007-STYLE

Eleven elite paleo enthusiasts were flown into the Tyaughton area near Castle Peak north of Goldbridge 007-style in a shiny new Jet Ranger helicopter. We were interested in the local geology and fossils from the Jurassic/Triassic exposures high in the alpine. Camping at about 7,500 ft, we were treated to all four seasons and some great collecting over the course of the week.

Past trips have included grizzlies at close quarters. This trip we saw fresh tracks and scat, but the bears were actively avoiding our camp, just leaving enough evidence to give us the heads up that this is their territory.

Over the course of the week we collected beautiful marine specimens and saw a buck with a sexy set of horns, flocks of Franciscans and a majestic lone wolf.

The area is home to active research by UBC paleontologist, Louise Longridge and boasts abundant marine fauna - ammonites, bivalves, belemnites and have a chance to see the Triassic-Jurassic boundary – a rare treat.

As with all fossil collecting, our search for treasure has a higher goal. All of our finds are lovingly photographed, catalogued and available for study. If fossils are your thing, visit www.bcfossils.ca to find a local society and get on out there.

Originally published at getawaybc.com