Wednesday 18 May 2016
Tuesday 10 May 2016
Sunday 8 May 2016
Tuesday 3 May 2016
STAWAMUS CHIEF: GRANITE SENTINEL
The Stawamus Chief, the second largest freestanding piece of
granite in the world, has made Squamish one of the top rock climbing
destinations in North America.
This magestic peak is said to have been one of
the last areas of dry ground during a time of tremendous flooding in the
Squamish area.
Many cultures have a flood myth in their oral history and
the Coast Salish people of Squamish are no exception. They tell of a time when
all the world save the highest peaks were submerged and only one of their
nation survived. Warned in a vision, a warrior of the Squamish nation escaped
to safety atop Mount Chuckigh (Mount Garibaldi) as the waters rose.
After the flood, a magestic eagle came to him with a gift of
salmon to tell him that the world below was again hospitable and ready for his
return. He climbed down the mountain and returned to find his village covered
by a layer of silt.
All his people had perished, but the gods gave him another
gift, a second survivor of the flood, a beautiful woman who became his wife.
For their gift of generosity they had shown, the couple took the eagle as their
chief totem and have honored it through generations of Coast Salish people.
Sunday 1 May 2016
Tuesday 26 April 2016
Thursday 21 April 2016
WASHINGTON RISING
Over vast expanses of time, powerful tectonic forces have
massaged the western edge of the continent, smashing together a seemingly
endless number of islands to produce what we now know as North America and the
Pacific Northwest.
Intuition tells us that the earth’s crust is a permanent,
fixed outer shell – terra firma. Aside from the rare event of an earthquake or
the eruption of Mount St. Helen’s, our world seems unchanging, the landscape constant.
In fact, it has been on the move for billions of years and continues to shift
each day.
As the earth’s core began cooling, some 4.5 billion years
ago, plates, small bits of continental crust, have become larger and smaller as
they are swept up in or swept under their neighboring plates. Large chunks of
the ocean floor have been uplifted, shifted and now find themselves thousands
of miles in the air, part of mountain chains far from the ocean today or carved
by glacial ice into valleys and basins.
Two hundred million years ago, Washington was two large islands, bits of continent on the move westward, eventually bumping up against the North American continent and calling it home.
Two hundred million years ago, Washington was two large islands, bits of continent on the move westward, eventually bumping up against the North American continent and calling it home.
Even with their new fixed address, the shifting continues;
the more extreme movement has subsided laterally and continues vertically. The
upthrusting of plates continues to move our mountain ranges skyward – the path
of least resistance.
This dynamic movement has created the landscape we see today and helped form the fossil record that tells much of Washington’s relatively recent history – the past 50 million years. Chuckanut Drive is much younger than other parts of Washington. The fossils found there lived and died some 40-55 million years ago, very close to where they are now, but in a much warmer, swampy setting. The exposures of the Chuckanut Formation were once part of a vast river delta; imagine, if you will, the bayou country of the Lower Mississippi.
This dynamic movement has created the landscape we see today and helped form the fossil record that tells much of Washington’s relatively recent history – the past 50 million years. Chuckanut Drive is much younger than other parts of Washington. The fossils found there lived and died some 40-55 million years ago, very close to where they are now, but in a much warmer, swampy setting. The exposures of the Chuckanut Formation were once part of a vast river delta; imagine, if you will, the bayou country of the Lower Mississippi.
The siltstones, sandstones, mudstones and conglomerates of
this formation were laid down about 40-54 million years ago during the Eocene
epoch, a time of luxuriant plant growth in the subtropical flood plain that
covered much of the Pacific Northwest.
This ancient wetland provided ideal conditions to preserve
the many trees, shrubs and plants that thrived here. Plants are important in
the fossil record because they are more abundant and can give us a lot of information
about climate, temperature, the water cycle and humidity of the region. The
Chuckanut flora is made up predominantly of plants whose modern relatives live
in tropical areas such as Mexico and Central America.
While less abundant, evidence of the animals that called
this ancient swamp home are also found here. Rare bird, reptile, and mammal
tracks have been immortalized in the outcrops of the Chuckanut Formation.
Tracks of a type of archaic mammal of the Orders Pantodonta or Dinocerata (blunt foot herbivores), footprints from a small shorebird, and tracks from an early equid or webbed bird track give evidence to the vertebrates that inhabited the swamps, lakes and river ways of the Pacific Northwest 50 million years ago.
Tracks of a type of archaic mammal of the Orders Pantodonta or Dinocerata (blunt foot herbivores), footprints from a small shorebird, and tracks from an early equid or webbed bird track give evidence to the vertebrates that inhabited the swamps, lakes and river ways of the Pacific Northwest 50 million years ago.
Fossil mammals from Washington do get most of the press. The
movement of these celebrity vertebrates was captured in the soft mud on the
banks of a river, one of the only depositional environments favorable for track
preservation.
The bone record is actually far less abundant that the plant
record, except near shell middens, given the preserving qualities of calcium
and an alkaline environment. While calcium rich bones and teeth fossilize well,
they often do not get laid down in a situation that makes this possible.
Hence the terrestrial paleontological record of Washington State
at sites like Chuckanut is primarily made up of plant material.
Monday 11 April 2016
CETACEA: HUMPBACK WHALE
Look at this lovely maternal bond between an adult Humpback whale female, Megaptera novaeangliae, and her young. Humpbacks are a species of baleen whale for whom I hold a special place in my heart.
Baleens are whales who feed on plankton and other wee oceanic tasties that they consume through their baleens, a specialised filter of keratin that frames their mouths.
There are fifteen species of baleen whales. They inhabit all major oceans, in a wide band running from the Antarctic ice edge to 81°N latitude.
In the Kwak̓wala language of the Kwakiutl or Kwakwaka'wakw, speakers of Kwak'wala, of the Pacific Northwest, whales are known as g̱wa̱'ya̱m. Both the California grey and the Humpback whale live on the coast. Only a small number of individuals in First Nation society had the right to harpoon a whale. It was generally only the Chief who was bestowed this great honour. Humpback whales like to feed close to shore and enter the local inlets. Around Vancouver Island and along the coast of British Columbia, this made them a welcome food source as the long days of winter passed into Spring.
Humpback whales are rorquals, members of the Balaenopteridae family that includes the blue, fin, Bryde's, sei and minke whales. The rorquals are believed to have diverged from the other families of the suborder Mysticeti during the middle Miocene.
While cetaceans were historically thought to have descended from mesonychids— which would place them outside the order Artiodactyla— molecular evidence supports them as a clade of even-toed ungulates — our dear Artiodactyla. Baleen whales split from toothed whales, the Odontoceti, around 34 million years ago.
Thursday 31 March 2016
Wednesday 30 March 2016
Tuesday 29 March 2016
MCABEE: SOLVING MYSTERIES IN THE EOCENE
Plant fossils from the Okanagan highlands, an area centred in the Interior of British Columbia, provide important clues to an ancient climate.
While the area is referred to as the Okanagan, the term is used in a slightly misleading fashion to describe an arc of Eocene lakebed sites that extend from Smithers in the north, down to the fossil site of Republic Washington, in the south.
The grouping includes the fossil sites of Driftwood Canyon, Quilchena, Allenby, Tranquille, McAbee, Princeton and Republic.
These fossil sites range in time from Early to Middle Eocene, and the fossil they contain give us a snapshot of what was happening in this part of the world because of the varied plant fossils they contain.
While the area around the Interior of British Columbia was affected, McAbee, near the town of Cache Creek, was not as warm as some of the other Middle Eocene sites, a fact inferred by what we see and what is conspicuously missing.
In looking at the plant species, it has been suggested that the area of McAbee had a more temperate climate, slightly cooler and wetter than other Eocene sites to the south at Princeton, British Columbia and Republic and Chuckanut, Washington.
We see ginko, a variety of insects and fish remains, the rare feather and a boatload of deciduous evidence. Missing are the tropical Sabal (palm), seen at Princeton and the impressive Ensete (banana) and Zamiaceae (cycad) found at Republic and Chuckanut, Washington.
While the area is referred to as the Okanagan, the term is used in a slightly misleading fashion to describe an arc of Eocene lakebed sites that extend from Smithers in the north, down to the fossil site of Republic Washington, in the south.
The grouping includes the fossil sites of Driftwood Canyon, Quilchena, Allenby, Tranquille, McAbee, Princeton and Republic.
These fossil sites range in time from Early to Middle Eocene, and the fossil they contain give us a snapshot of what was happening in this part of the world because of the varied plant fossils they contain.
While the area around the Interior of British Columbia was affected, McAbee, near the town of Cache Creek, was not as warm as some of the other Middle Eocene sites, a fact inferred by what we see and what is conspicuously missing.
In looking at the plant species, it has been suggested that the area of McAbee had a more temperate climate, slightly cooler and wetter than other Eocene sites to the south at Princeton, British Columbia and Republic and Chuckanut, Washington.
We see ginko, a variety of insects and fish remains, the rare feather and a boatload of deciduous evidence. Missing are the tropical Sabal (palm), seen at Princeton and the impressive Ensete (banana) and Zamiaceae (cycad) found at Republic and Chuckanut, Washington.
Wednesday 23 March 2016
DRAGONFLIES: ANCIENT PREDATORS
Dragonflies, from the order Odonata, have been around for
over 250 million years. The most conspicuous difference in their evolution over
time is the steady shrinking of their wingspan from well over two and a half
feet down to a few inches.
Voracious predators, today they dine on bees, wasps,
butterflies and avoid the attentions of birds and wee lizards -- but back in the day, they had a much larger
selection of meals within their grasp. Time has turned the tables. Small lizards and birds who
today choose dragonflies as a tasty snack used to be their preferred prey.
Monday 21 March 2016
Wednesday 16 March 2016
Sunday 13 March 2016
PALTECHIOCERAS OF WRANGELLIA
Those working in the Jurassic exposures on Vancouver Island are a determined crew. Most of the sedimentary deposits of the Jurassic are exposed in the hard to reach areas between Nootka Sound and Cape Scott.
By the time these ammonites were being buried in sediment, Wrangellia, the predominately volcanic terrane that now forms Vancouver Island and the Queen Charlotte Islands, had made its way to the northern mid-laditudes.
This detail of the Jurassic ammonite, Paltechioceras sp. shot with an ultra-low f-stop, is from an all but inaccessible site in Sayward, Bonanza Group, Vancouver Island.
We did a fossil field trip up there a few years ago with the Courtenay & Qualicum beach crew. The drive up the mountain was thrilling as the road narrowed until it was barely the width of our wheel base. Thrilling to say the least.
By the time these ammonites were being buried in sediment, Wrangellia, the predominately volcanic terrane that now forms Vancouver Island and the Queen Charlotte Islands, had made its way to the northern mid-laditudes.
This detail of the Jurassic ammonite, Paltechioceras sp. shot with an ultra-low f-stop, is from an all but inaccessible site in Sayward, Bonanza Group, Vancouver Island.
We did a fossil field trip up there a few years ago with the Courtenay & Qualicum beach crew. The drive up the mountain was thrilling as the road narrowed until it was barely the width of our wheel base. Thrilling to say the least.
Friday 19 February 2016
Tuesday 16 February 2016
Tuesday 2 February 2016
Saturday 23 January 2016
LINCOLN CREEK FORMATION: EOCENE-OLIGOCENE BORDER
Fossil crabs, several dozen species of mulluscs including the elusive tusk shell have been found in the fossil exposures of the Lincoln Creek Formation, southern Olympic Peninsula, near the town of Porter, Washington, 46°56'20"N, 123°18'38"W.
It is a site I return to each year to see the erosion and what new specimens have worked their way to the surface.
The whitish strata consists of tuffaceous siltstone and sandstone with concretionary beds throughout. They are slightly older than originally thought, coming in around 37 million-years, straddling the Eocene-Oligocene border. Here a lovely crab, Pulalius vulgaris, sits in the sand. He would be in good company at the site amongst the more common scaphodpod shells and other wee gastropods.
The whitish aragonitic shells of scaphopods are conical and curved with a planispiral curve, looking a bit like an elephant's tusk, hence their common name. They prefer to live on soft substrates in subtidal zones so they are not as abundant or readily visible on our beaches as their gastropods and bivalves compatriots. Tusk shells and their fossil relatives, however, are found commonly in the sediments at Porter and other localities throughout the Pacific Northwest while crabs are found, but more rare.
It is a site I return to each year to see the erosion and what new specimens have worked their way to the surface.
The whitish strata consists of tuffaceous siltstone and sandstone with concretionary beds throughout. They are slightly older than originally thought, coming in around 37 million-years, straddling the Eocene-Oligocene border. Here a lovely crab, Pulalius vulgaris, sits in the sand. He would be in good company at the site amongst the more common scaphodpod shells and other wee gastropods.
The whitish aragonitic shells of scaphopods are conical and curved with a planispiral curve, looking a bit like an elephant's tusk, hence their common name. They prefer to live on soft substrates in subtidal zones so they are not as abundant or readily visible on our beaches as their gastropods and bivalves compatriots. Tusk shells and their fossil relatives, however, are found commonly in the sediments at Porter and other localities throughout the Pacific Northwest while crabs are found, but more rare.
Thursday 31 December 2015
TUSKS AND BONE: TANGIERS
During the Miocene and Pliocene, 12-1.6 million years ago, a diverse group of extinct proboscideans, elephant-like animals walked the Earth.
Most of these large beasts had four tusks and likely a trunk similar to modern elephants. They were creatures of legend, inspiring myths and stories of fanciful creatures to the first humans to encounter them.
Beyond our neanderthal friends, one such fellow was Quintus Sertorius, a Roman statesman come general, who grew up in Umbria. Born into a world at war just two years before the Romans sacked Corinth to bring Greece under Roman rule, Quintus lived much of his life as a military man far from his native Norcia. Around 81 BC, he travelled to Morocco, the land of opium, massive trilobites and the birthplace of Antaeus, the legendary North African ogre who was killed by the Greek hero Heracles.
The locals tell a tale that Quintus requested proof of Antaeus, hard evidence he could bring back to Rome to support their tales so they took him to a mound at Tingis, Morocco, where they unearthed the bones of a Neogene elephant, Tetralophodon.
Tetralophodon bones are large and skeletons singularly impressive. Impressive enough to be taken for something else entirely. By all accounts these proboscidean remains were that of the mythical ogre Antaeus and were thus reported back to Rome as such. It was hundreds of years later before their true heritage was known.
Monday 21 December 2015
Saturday 19 December 2015
Friday 20 November 2015
Tuesday 10 November 2015
Wednesday 4 November 2015
Thursday 15 October 2015
TYLOSTOME TUMIDUM
This lovely big fellow is Tylostoma tumidum, an epifaunal grazing Lower Cretaceous Gastropod from the Goodland Formation near Fort Worth, Texas, USA. (171.6 to 58.7 Ma)
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