TheRealOutis 0 Posted June 20 Share Posted June 20 What is this rock? Fossil? Coprolite? Found in SW utah. any info is appreciated! Quote Link to post Share on other sites
Haderly 96 Posted June 21 Share Posted June 21 It could be but It also looks a lot like the mushroom rhyolite that I have dug. I searched online but could not find a good picture of the unbroken outside. If you can cut it open you will be better able to identify it. Quote Link to post Share on other sites
d_day 307 Posted June 21 Share Posted June 21 (edited) The layering seen here would rule out coprolite. I’d guess you’ve got some calcite there. It’s very difficult to ID minerals from photos alone, so I can’t be certain. Edited June 21 by d_day Quote Link to post Share on other sites
Morlock 1,600 Posted June 21 Share Posted June 21 On 6/20/2020 at 12:54 AM, TheRealOutis said: What is this rock? Fossil? Coprolite? Found in SW utah. any info is appreciated! My very first impression was a stromatolite. Just not sure though. Quote Link to post Share on other sites
d_day 307 Posted June 21 Share Posted June 21 8 minutes ago, Morlock said: My very first impression was a stromatolite. Just not sure though. That was my first thought as well. Quote Link to post Share on other sites
Bedrock Bob 3,871 Posted June 22 Share Posted June 22 Yeah. Stromatolite. Fossilized bacteria. That is my wild guess. Quote Link to post Share on other sites
4meter 186 Posted June 22 Share Posted June 22 I'm with Haderly on this one. It's a Lapillistone, a volcanic rock made up of rounded, pebble sized, lava blobs called lapilli. It does look like any Stromatolites I have observed. Lapillistones can be very pretty once cut and polished. Nice find! Quote Link to post Share on other sites
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