ptera Posted February 18 Share Posted February 18 Anyone know what this is? It's from Precambrian, Mineral Fork Tillite. The closest I could find is maybe some kind of oolite? Is it possible this is made by some kind of microbial life, or is this just geologic? 2 Link to comment Share on other sites More sharing options...
FranzBernhard Posted February 18 Share Posted February 18 (edited) A clast of oolite/pisolite/oncolite could it be, yes. Often, algae or cyanobacteria are involved in their formation. Have you checked out this tillite for its clast content via google etc.? Franz Bernhard Edited February 18 by FranzBernhard Link to comment Share on other sites More sharing options...
Rockwood Posted February 18 Share Posted February 18 3 hours ago, FranzBernhard said: Often, algae or cyanobacteria are involved in their formation It does sort of resemble the lichens which are also algae and cyanobacteria. Link to comment Share on other sites More sharing options...
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