Sabre52
Cave Dweller 
Me and my gal, Rosie
Member since August 2005
Posts: 20,492
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Post by Sabre52 on Dec 23, 2017 10:46:37 GMT -5
Howdy folks, Tried to post this on the other thread but no way to make an attachment of a pic I can see, so I'll just do a new post. These are not fancy but I like them because they come right out of the creek bed by my house. Eons of erosion etches them from the Texas Turritella ( actually Cerithium sp. ) deposits in the lower Cretaceous Edwards Limestone. Shells are completely replaced by quartz so are erosion resistant and exposed when the acid rain dissolves away the limestone matrix. Inside all are filled with tiny quartz crystals. Gastropods run from minute to about three inches long.....Mel  |
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Post by rmf on Dec 23, 2017 11:49:08 GMT -5
Sabre52 have you ever tried to soak them in Acetic Acid and see what is left? Do you find other fossils (like shark teeth or vertebrate material) in the Cretaceous near you?
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Post by fernwood on Dec 23, 2017 12:40:21 GMT -5
Very cool. I see a very large and blurry photo, but also see beyond that. Know why you love being able to find things like this, close to home. Thanks for posting.
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Fossilman
Cave Dweller
Member since January 2009
Posts: 20,718 
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Post by Fossilman on Dec 23, 2017 13:42:05 GMT -5
We find fossils on the coastline here in Oregon.. But I haven't found any that are worth posting (yet)..
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Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,492
|
Post by Sabre52 on Dec 23, 2017 16:33:26 GMT -5
Well, dang fernwood, It's a thumbnail on my computer. The when I click on it it looks OK. Didn't use my fancy camera though.
rmf. I have not found any yet but there are mosasaur fossils round here, mostly vertebra and teeth. Buddy of mine had a drawer full but no luck for me yet. Mostly just the typical shallow water lower cretaceus stuff for me. Giant moon snails, huge number of oysters and clams, lots of small sea urchins and a good array of gastropods. Find the occasional ammonite but the Fredericksburg formation where they occur has soft fossils and they do not last long after exposure. Little pet wood and lots of blah stromatolite? stuff. I take the kids out for hunts and they have fun but it's not nearly as nice as other parts of Texas where they really have spectacular stuff. There should be fish fossils and shark teeth too but I've also not found any of those yet. matrix here is limestone unless the fossils are in chert. Acid would just leave a pile of free quartz shells...Mel
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Post by rmf on Dec 23, 2017 20:56:42 GMT -5
Well, dang fernwood, It's a thumbnail on my computer. The when I click on it it looks OK. Didn't use my fancy camera though. rmf. I have not found any yet but there are mosasaur fossils round here, mostly vertebra and teeth. Buddy of mine had a drawer full but no luck for me yet. Mostly just the typical shallow water lower cretaceus stuff for me. Giant moon snails, huge number of oysters and clams, lots of small sea urchins and a good array of gastropods. Find the occasional ammonite but the Fredericksburg formation where they occur has soft fossils and they do not last long after exposure. Little pet wood and lots of blah stromatolite? stuff. I take the kids out for hunts and they have fun but it's not nearly as nice as other parts of Texas where they really have spectacular stuff. There should be fish fossils and shark teeth too but I've also not found any of those yet. matrix here is limestone unless the fossils are in chert. Acid would just leave a pile of free quartz shells...Mel I love to hunt the Cretaceous. I have hunted in MS and TN and KS. The Croc is from TN Cretaceous. I have found parts of turtle, mosasaurus, plesiosaur, enchodis (fish) and some shark, I am not all that interested in bivalves and gastropods due to how fragile they are. I like the verts best. Thanks for the info. |
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