Phevo Posted February 28, 2018 Share Posted February 28, 2018 34 minutes ago, M Harvey said: I agree, I also thought chert was marine in origin. Very informative! It is, but sometimes plant material/wood can drift from land out to sea where it sinks We also find some plant material in flint in Denmark, that has formed in depths of an estimated 100-200m Link to comment Share on other sites More sharing options...
Plantguy Posted March 4, 2018 Share Posted March 4, 2018 Wonderful material! Thanks for showing us. Regards, Chris Link to comment Share on other sites More sharing options...
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