Ancient Species -
Algae

The term "algae" refers to organisms which are aquatic and which manufacture their own food by "capturing" light energy to manufacture sugars. It includes photosynthetic bacteria (cyanobacteria), chromista ("coloured algae"), and rhodophyta ("red algae"), as well as "green algae" - none of which are closely related.

Some algae secrete silica or calcium carbonate and fossil records of such  algae date back to the Proterozoic Period about 1,250 years ago. Limestone deposits which originated as coral reefs usually contain large amounts of calcium carbonate from algae secretions. In some cases, algae contribute more to the building of coral reefs than coral do.

Green algae

 

Algae fossils now available (at eBay):

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Ordovician Solenoides iowensis algae fossil Ottosee Formation complete colony

AU $28.00
End Date: Wednesday Nov-13-2019 6:22:29 EST
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Pennsylvanian Somphospongia fossil sponge algae fossil cut w/ great layers (sml)

AU $7.36
End Date: Wednesday Oct-30-2019 20:02:34 EST
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Pennsylvanian Somphospongia fossil sponge algae fossil cut polished half Medium

AU $14.00
End Date: Tuesday Oct-22-2019 4:56:39 EST
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Cambrian Girvanella algae algal ball fossil stromatolite polished slice

AU $5.89
End Date: Monday Nov-11-2019 21:01:24 EST
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Stromatolite [Algae] Fossil - USA - Eocene Period - FSE380 ✔100% Genuine

AU $19.04
End Date: Tuesday Oct-15-2019 23:42:24 EST
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