Lauren16 Posted March 7, 2020 Share Posted March 7, 2020 This is one of several features I uncovered in a limestone/dolostone loose rock in a river. Only the "gingko leaf" end of the worm-like feature was exposed: the "worm" was enclosed in soft chalky dolostone that I removed with vinegar baths and much rubbing - so the "worm" had not been subject to weathering. From the Pivabiska River, 20 km north of Hearst, Northern Ontario, Canada, presumably carried south by glaciers from limestone bedrock farther north. I've been told it is a chert concretion, but could it be a chert-ified fossil? Q: If it's not a fossil and just concretion, how did the parallel grooves form? (The other features have parallel grooves too). Link to comment Share on other sites More sharing options...
Shamalama Posted March 9, 2020 Share Posted March 9, 2020 Like your other posts, I think these are just some eroded limestone features. -Dave __________________________________________________ Geologists on the whole are inconsistent drivers. When a roadcut presents itself, they tend to lurch and weave. To them, the roadcut is a portal, a fragment of a regional story, a proscenium arch that leads their imaginations into the earth and through the surrounding terrain. - John McPheeIf I'm going to drive safely, I can't do geology. - John McPheeCheck out my Blog for more fossils I've found: http://viewsofthemahantango.blogspot.com/ Link to comment Share on other sites More sharing options...
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