BobWill Posted April 8, 2012 Share Posted April 8, 2012 This is a follow up to a suggestion I made in another discussion. Here's mine. A bivalve from the Cretaceous Duck Creek of Cooke County Texas. Link to comment Share on other sites More sharing options...
jpc Posted April 8, 2012 Share Posted April 8, 2012 ]Here's a few late Cretaceous bacultie pix and an ammonite I showed a few months ago. this one os thorugh the microscope; the left end is out of focus. also though the scope and a baby ammonite inside the whorl of a much larger ammonite. Link to comment Share on other sites More sharing options...
Ludwigia Posted April 8, 2012 Share Posted April 8, 2012 Well. I guess I could show you practically all of my shell-preserved ammonites, since the original aragonite has long since been replaced by calcite, but I'll just stick to this one for the time being. There's also some goethite, dolomite and baryte in there too. Brasilia decipiens from the upper Aalenian of Geisingen. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
BobWill Posted April 8, 2012 Author Share Posted April 8, 2012 Love that little ammonite! What a joy that must have been to find. Link to comment Share on other sites More sharing options...
Ludwigia Posted April 8, 2012 Share Posted April 8, 2012 Love that little ammonite! What a joy that must have been to find. Right you are! Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
micropterus101 Posted April 8, 2012 Share Posted April 8, 2012 Heres a Calcite Aturia Angustata. It also flouresces under uv light. fossil crabs website Link to comment Share on other sites More sharing options...
Bill Posted April 8, 2012 Share Posted April 8, 2012 (edited) Hope it's ok to add this here. Not replaced by calcite but was on it's way to being... Echinocorys scutata with calcite crystals growing from each plate. Edited April 8, 2012 by Bill KOF, Bill. Welcome to the forum, all new members www.ukfossils check it out. Link to comment Share on other sites More sharing options...
t-tree Posted April 8, 2012 Share Posted April 8, 2012 A lower carboniferous Gastropod from a limestone quarry in Derbyshire,UK. it's the only one i've found there with this calcite preservation. I have it as Naticopis elliptica but i'm open to suggestions. the opening has a brachiopod imprint in it, the brachiopod is limestone. Be happy while you're living for you're a long time dead. Link to comment Share on other sites More sharing options...
Foshunter Posted April 8, 2012 Share Posted April 8, 2012 This is a Placenticarus sp. from the Santonian Blossom Sand exposure in N.E. Texas Grow Old Kicking And Screaming !!"Don't Tread On Me" Link to comment Share on other sites More sharing options...
Ludwigia Posted April 8, 2012 Share Posted April 8, 2012 This is a Placenticarus sp. from the Santonian Blossom Sand exposure in N.E. Texas Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
squalicorax Posted April 8, 2012 Share Posted April 8, 2012 Texas Echinoid from the Walnut My Flickr Page of My Collection: http://www.flickr.com/photos/79424101@N00/sets Link to comment Share on other sites More sharing options...
mikeymig Posted April 8, 2012 Share Posted April 8, 2012 The title of this thread should say " show us your calcite/aragonite replacement fossils". There are examples of both in this thread. Heres a little fossil Busycon from Florida with nice scalenohedral calcite crystals inside. Its not replaced by calcite but its pretty. mikey Many times I've wondered how much there is to know. led zeppelin Link to comment Share on other sites More sharing options...
Sinopaleus Posted April 8, 2012 Share Posted April 8, 2012 Mercanaria sp, Fort Drum, Florida, USA Link to comment Share on other sites More sharing options...
JimB88 Posted April 8, 2012 Share Posted April 8, 2012 (edited) a spiriferina Edited April 8, 2012 by JimB88 Link to comment Share on other sites More sharing options...
nala Posted April 8, 2012 Share Posted April 8, 2012 Few of mine from France Link to comment Share on other sites More sharing options...
xonenine Posted April 8, 2012 Share Posted April 8, 2012 :eat popcorn: a full basket of Easter eye candy, great thread Bob... "Your serpent of Egypt is bred now of your mud by the operation of your sun; so is your crocodile." Lepidus Link to comment Share on other sites More sharing options...
BobWill Posted April 8, 2012 Author Share Posted April 8, 2012 :eat popcorn: a full basket of Easter eye candy, great thread Bob... Exceeding ALL expectations! Link to comment Share on other sites More sharing options...
mikecable Posted April 8, 2012 Share Posted April 8, 2012 Texas Echinoid from the Walnut Very similar to the one I posted in the Walnut Clay thread in the Hunting Trips forum. Link to comment Share on other sites More sharing options...
mikecable Posted April 8, 2012 Share Posted April 8, 2012 Texas Echinoid from the Walnut I see you took the trouble to back-light the specimen. Is this type of preservation rare in the Walnut Clay? Or just different enough to merit some extra attention? Link to comment Share on other sites More sharing options...
markm Posted April 8, 2012 Share Posted April 8, 2012 Here's something a little different. A cretaceous Rhacolepis calcite geode, Santana fm, Brazil Link to comment Share on other sites More sharing options...
markm Posted April 8, 2012 Share Posted April 8, 2012 Here is a Santana Axelrodichthys coelacanth with calcite crystals in the braincase Link to comment Share on other sites More sharing options...
darrow Posted April 9, 2012 Share Posted April 9, 2012 Not "replacement" but I think this is calcite in this long bone fragment I picked up in Galveston Bay dredge spoils. I've found a small number of similarly filled fragments in the same spot over the last year or so... Darrow Link to comment Share on other sites More sharing options...
Ludwigia Posted April 9, 2012 Share Posted April 9, 2012 Nice fish! And here's a bit of old jurassic wood from Sengenthal. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
nala Posted April 9, 2012 Share Posted April 9, 2012 few more ammos from Normandy jurassic and a Cistoid from Ukraine Link to comment Share on other sites More sharing options...
nala Posted April 9, 2012 Share Posted April 9, 2012 and two more very little things Link to comment Share on other sites More sharing options...
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