Fossils
Re: Fossils
My latest addition:
Polished Stromatolite
Precambian. This specimen estimated between 2.2 & 2.4 billion years ago
Bolivia
12cm x 10 cm
Stromatolites are the earliest fossil record of life on earth
There is a bit of controversy. The earliest recorded one from Australia is 3.48 billion years. Another record is even older - 3.7 billion years from Greenland however there is doubt as to whether this is organic or geologic in origin.
Stromatolites are a photosynthesising cyanobacteria which (when alive) are found in shallow, warm saline water. Either forming flat sheets or more often dome shaped mounds. As a layer of bacteria multiplies it incorporates grains of sand around the mucus on their bodies slowly forming the layer upon layer.
The very early prehistoric Stromatolites are thought to have contributed significantly to the oxygenation pf the Earth's atmosphere.
Modern Stromatolites are still alive today, most famously in Shark Bay, Australia.
Not a great photo. Doesn't do it justice.
Polished Stromatolite
Precambian. This specimen estimated between 2.2 & 2.4 billion years ago
Bolivia
12cm x 10 cm
Stromatolites are the earliest fossil record of life on earth
There is a bit of controversy. The earliest recorded one from Australia is 3.48 billion years. Another record is even older - 3.7 billion years from Greenland however there is doubt as to whether this is organic or geologic in origin.
Stromatolites are a photosynthesising cyanobacteria which (when alive) are found in shallow, warm saline water. Either forming flat sheets or more often dome shaped mounds. As a layer of bacteria multiplies it incorporates grains of sand around the mucus on their bodies slowly forming the layer upon layer.
The very early prehistoric Stromatolites are thought to have contributed significantly to the oxygenation pf the Earth's atmosphere.
Modern Stromatolites are still alive today, most famously in Shark Bay, Australia.
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Richprins
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Re: Fossils
Dzombs!Very informative!
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Lisbeth
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Re: Fossils
"Education is the most powerful weapon which you can use to change the world." Nelson Mandela
The desire for equality must never exceed the demands of knowledge
The desire for equality must never exceed the demands of knowledge
Re: Fossils
Thanks
This hobby has gotten "slightly" out of control.
I started with collecting fish, then plants, then started adding amber. And now the stromatolites.
With the odd Trilobite and Ammonite too
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Richprins
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Re: Fossils
Sounds quite Biblical! 
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Re: Fossils
The prehistoric tribes of the desert
I have just ordered another 2 pieces. (stromatolites)
Went online. Searched a few fossil supplies. A few clicks on the computer. And I should have them by the end of next week.
Too easy
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Richprins
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Re: Fossils
Looks very plant-like! 
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