Vnaz50 Posted February 23, 2021 Share Posted February 23, 2021 On this piece of chert it appears to have either an iron or copper coloring at the top but a green undertone at the bottom. On the second picture I’m assuming that was caused by erosion. What would create the green undertone coloring? Link to comment Share on other sites More sharing options...
JohnJ Posted February 24, 2021 Share Posted February 24, 2021 It doesn't have the typical characteristics of chert. The green could be microscopic algae. The human mind has the ability to believe anything is true. - JJ Link to comment Share on other sites More sharing options...
erose Posted February 25, 2021 Share Posted February 25, 2021 I suspect this is Dolomite. 1 Link to comment Share on other sites More sharing options...
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