Found this Saturday morning, I'm not sure what all it is. About 2 1/2" X 1", Photo's rotated to show four sides.
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Fossil/s or conglomerate of shells?
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Fossil/s or conglomerate of shells?
Last edited by gregszybala; 03-25-2020, 04:36 PM.Searching the fields of NW Indiana and SW MichiganTags: None
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That would make a nice display piece, Greg. It's almost 'sculptural' in an artistic sense.
I would put it in the territory of "coquinite".
Coquina is an extremely porous limestone composed almost entirely of sand-sized shell fragments (usually mollusks or gastropods) that have been transported by waves and currents. A small amount of cement binds the rock together.
I keep six honest serving-men (they taught me all I knew); Their names are What and Why and When and How and Where and Who.
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I can see some pretty clear tube structures in your second and third pictures. Maybe this part of a silicified colony of tubular coral held together with silt? One of my fossil books says Cass, White, and Carol counties in Indiana have quite a few marine examples. Apparently, the whole northern part of the state is one big fossilized sea reef.Last edited by Cecilia; 03-26-2020, 07:06 AM.Digging in GA, ‘bout a mile from the Savannah River
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In with those serpulid worm tubes I think there are also some Turritellids/ Vermitellids gastropod tubes in the mix? Maybe see at least one septal wall (broken half dome)
Professor Shellman
Tampa Bay
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I did look at fossilized vermitellids, and turritellids earlier (I’m good with pictures, bad with names), as well as some tubuliporata, cephalopods, sphenothallus, cyclostome, lophophyllidion, and a buncha other plants, animals, and minerals! Mostly, I compared everybody’s tubes. For now, this minute, I think yes as to vermitellids, but no as to turritellids.... I’m not done a-pondering, tho.....Last edited by Cecilia; 03-26-2020, 12:37 PM.
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Y’all should see example of Tom’s suggested consideration, Vermitellids, a sea snail, because it does indeed resemble my response of Supulids, a sea worm. In fact, in subsequent reading, even geologists say only way can tell them apart is to look inside the tubes. The snails’ tubes are shiny, whereas the worms’ are dull inside. Originally, when I looked at this picture, I couldn’t see any vertical bead-like ridges like those appearing Greg’s pictures, but I think it’s just the lighting doesn’t show them.
Digging in GA, ‘bout a mile from the Savannah River
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