• Kim Pervis posted a new activity comment 1 year, 3 months ago

    1 year, 3 months ago
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    “Beaumont Formation

    Pleistocene

    Pleistocene
    clay, silt

    On McAllen-Brownsville Sheet (1976) dominantly clay and mud of low permeability. (from Moore and Wermund, 1993a, 1993b): Light- to dark-gray and bluish- to greenish-gray clay and silt, intermixed and interbedded; contains beds and lenses of fine sand, decayed organic matter, and many b…[Read more]

  • Kim Pervis posted a new activity comment 1 year, 3 months ago

    1 year, 3 months ago
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    Oops mentioned

  • Kim Pervis posted a new activity comment 1 year, 3 months ago

    1 year, 3 months ago
    1 year, 3 months ago

    This is a description of the geology from the area mentioned

  • Kim Pervis posted a new activity comment 1 year, 3 months ago

    1 year, 3 months ago
    1 year, 3 months ago

    Looks like a sedimentary rock that is calcium carbonate based. You can test this with something like vinegar with 5% acid or CLR. If calcium carbonate based it would fizz. The stronger the acid the more fizz. If it were bone it would not fizz unless coated with a calcium carbonate matrix.

  • Kim Pervis posted a new activity comment 1 year, 3 months ago

    1 year, 3 months ago
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    I can tell you it is not bone. I don’t see any of the normal internal bone structures like osteoclasts or typical bone porosity.

  • Kim Pervis became a registered member 1 year, 3 months ago

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  • Kim Pervis posted a new activity comment 1 year, 3 months ago

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    I do not see any characteristics that would indicate it is a bone. I don’t see anything like periosteum or osteoclasts or the typical things we see in bone structure. The overall morphology does not have the anatomical shape or details of a bone either other than it being long. It appears to be a concretion. Concretions can contain bone. They f…[Read more]

  • Kim Pervis posted a new activity comment 1 year, 3 months ago

    1 year, 3 months ago
    1 year, 3 months ago

    I agree with stromatolite. Cool piece. The ones I find are imbedded in chert and I can’t get out in one piece.

  • Kim Pervis posted a new activity comment 1 year, 3 months ago

    1 year, 3 months ago
    1 year, 3 months ago

    One thing about posting fossils is it is very helpful to have a scale and the geological age, formation or area it came from to be able to obtain an ID. I can’t tell if this is 1 cm or 30 cm. This is a cephalopod, but I cannot tell if it is an ammonite or not. There were spiral cephalopods prior to the Cretaceous period that are not a…[Read more]