Ephyalpes
edingunnensis Stromatolites
Geologic
Time: Late Paleoproterozoic, (~1.8 billion years ago)
Size (25.4
mm = 1 inch): 110 mm by 85 mm by 50 mm thick (maximum)
Fossil Site:
Yelma, Laverton, Western Australia
Fossil Code:
AS14008
Price: Sold
Description:
This is a polished section of stromatolite from the Paleoproterozoic
of Western Australia. The Paleoproterozoic spans one fifth of
the geological time scale, and includes the period in which stromatolites
were responsible for the formation of free oxygen, resulting
in the “rusting of the Earth” that led to such iron
ore deposits as the Mesabi Range in the US and extensive deposits
in Western Australia. Stromatolites are remnants of the most
ancient of colonial organisms. Stromatolites are fossils that
are the result of the work of simple blue-green “algae” or
Cyanophytes, which lived in chains or mats covered in a jellylike
substance. By taking in carbon dioxide as a food source, they
precipitate limy deposits on the jelly that builds up in layers.
Thus these organisms build up stony supports for their colonies.
These mound like structures can be anywhere from several centimeters
to several meters in height. This one had the display side given
a polish to accentuate the details. This is and end piece, so
the natural appearance of the other sides is evident, making
for an interesting display from any aspect.
Also
see: Stromatolites |
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