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Showing results for tags 'shallow marine'.
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Hi all, I found this specimen from a rotary borehole (window sample) at 5.4mbgl within the upper Whitby Mudstone Formation. I’m leaning towards a shell eating fish, but still unsure from the shape of the rest of the the samples which looks more like a coral? The site location is Dundry, Bristol, England. Reported geology: Whitby Mudstone formation Palaeoenvironment: Shallow marine environment Reported age: 174 -183 million years old Any suggestions would be greatly appreciated! Regards Reinier
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I was recently sent pictures of something that I am having a hard time identifying online. It was found in a creek bed of Cretaceous age, shallow marine limestone and marl on the west side of San Antonio, TX. It has a section that looks like it was attached to something. It does react to HCL and my initial thought was some sort of coral, but it has a very strange texture. I have seen a number of different types of coral, but never something like this and can't find anything similar. Any ideas? The closeup images of the texture were taken with a USB microscope.
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- cretaceous
- shallow marine
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Tracing the evolutionary origins of fish to shallow ocean waters, University of Pennsylvania, October 25, 2018 https://phys.org/news/2018-10-evolutionary-fish-shallow-ocean.html L. Sallan and others, 2018, "The nearshore cradle of early vertebrate diversification," Science 26 Oct 2018: Vol. 362, Issue 6413, pp. 460-464 DOI: 10.1126/science.aar3689 http://science.sciencemag.org/content/362/6413/460 https://gsa.confex.com/gsa/2018AM/webprogram/Paper323310.html Yours, Paul H.