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Showing results for tags 'septarian?'.
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Before I get stoned to death for posting this here (lame pun intended)…let me just say that I honestly have no clue what I’m looking at here but I am not suggesting, nor am I of the mind—that it’s a fossil, but it was just so strange lookin’ that I couldn’t help my curiosity, so here I am asking for opinions on what caused this to form and what it’s composed of most likely (if anything other than limestone, that is…. (-__-). location- far nw San Antonio, tx , just outside the foothills of the hillcountry (helotes, tx) Again, I do want to apologize if this belongs in a strictly geological forum somewhere, I’d have probably posted it there instead, had I been aware of one existing which was similar to this platform but exclusively for weird ugly rock identification help (lol). Thanks in advance.
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- backyard
- calcaneus?
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The Great Escape Attempt. What do you think happened on/to this mudstone?
Pippa posted a topic in Rocks & Minerals
This mudstone cobbler with a trapped rock that seems to be trying to escape, has me scratching my head. My thoughts are that the rock dropped into soft wet mud and was partially buried under the mud. The mud hardened and shrank when drying out, and split/separated at tension points, revealing the top ridges of the buried parts? A bit like Lake Michigan Septarians? Or maybe a hot drop of lava dropped onto and into hardened mud and spread out before cooling enough to harden? Bits and pieces of other material got stuck on top of the hardening Lava rock, giving it the current messy appearance? But what about the visible calcite or quartz area? Filled in later? Any ideas? Something completely different? Thanks in advance to all.- 7 replies
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- lava drop?
- mudstone
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