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Post by 1dave on Mar 26, 2020 10:51:51 GMT -5
I'm used to seeing chert nodules like this -  That I imagined were hollows made by by water, then filled with dissolved silica, but this morning i saw - en.wikipedia.org/wiki/Chert Speculation? |
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Post by fernwood on Mar 26, 2020 11:02:40 GMT -5
That looks like the ones I find. Was told the nodule was a fossil critter.
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fuss
spending too much on rocks
Member since October 2018
Posts: 258
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Post by fuss on Mar 26, 2020 19:29:42 GMT -5
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Post by hummingbirdstones2 on Mar 27, 2020 7:50:50 GMT -5
Chert in chalk! Thank you!
That explains a couple of pieces we got in an old collection a while back.
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Post by RickB on Mar 27, 2020 9:23:18 GMT -5
Dave, looks like a cave man couldn't knap it and threw it in the mud.
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Post by 1dave on Mar 27, 2020 17:50:18 GMT -5
My ancient assumption must be wrong for some chert.
The first image above seems to have been a silica jell blob from the beginning that was buried bit by bit.
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