Friday, September 23, 2005
Tuesday, September 20, 2005
Thursday, September 15, 2005
Monday, September 12, 2005
Petrified Sea Gardens - other shots
Petrified Sea Gardens
Glacial potholes - waterfalls of melt-water would pouroff the slow-moving glaciers and wear holes in the layer of rock... smaller pieces of rock helped the process, but sometimes a large boulder would be wedged in the stream of water and be worn smooth while making the hole rounder.
Solution channels - The crevices in the fossil reef are what led to its discovery in 1923 when a grazing cow fell and got stuck in one.
These crevices are the result of melting glaciers. Rushing melt-water would seek the path of least resistance and follow cracks in the rock, widening them over time.
This stone 'lion' was created from a large piece of fossilized rock in the 1920's.
A sundial and a frog from the Time Garden and Lily Pond.
Labels: hiking, NY, Petrified Sea Gardens
Petrified Sea Gardens - Glacial Erratics
Glacial erratics - slow moving glaciers carried rocks and boulders great distances and dropped them in another place... there were three large formations in the park, which also extend deep underground. The largest formation is estimated to weigh over 200 tons!
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Glacial erratics are often called "Indian Stones". This one (below) is believed to have a history in Native American use. It is oriented to the sunrise at solstice, and there appears to be an altar within the formation.
Labels: hiking, NY, Petrified Sea Gardens
Friday, September 09, 2005
Petrified Sea Gardens - fossils
Neuro and I visited Petrified Sea Gardens in Saratoga, NY on Labor Day... a fossil ocean reef estimated to be over 500 million years old.
These fossils were were made by cyanobacteria (bluegreen algae), which formed in mounds but have eroded revealing the inner structure.
Stromatolites still exist in the modern world, most notably in western Australia at Shark Bay, where the water is too salty for most predators.
Modern day stromatolites in Shark Bay, Australia
And a few more of my photos of the fossils:
Labels: hiking, NY, Petrified Sea Gardens