MOROPUS Posted February 27, 2010 Share Posted February 27, 2010 Here are some of mines: 3 1 Link to comment Share on other sites More sharing options...
MOROPUS Posted February 27, 2010 Author Share Posted February 27, 2010 First one: Radiolites sp.-next:Hippurites Radiosus with both valves in matrix. Last:Pseudotoucasia Santanderensis (northern Spain Endemism) All, from Iberian Peninsula. 2 1 Link to comment Share on other sites More sharing options...
Shamalama Posted February 28, 2010 Share Posted February 28, 2010 Rudists are strange and fascinating creatures. I have never found any myself but hope to one day. Thank you for sharing your pictures. -Dave __________________________________________________ Geologists on the whole are inconsistent drivers. When a roadcut presents itself, they tend to lurch and weave. To them, the roadcut is a portal, a fragment of a regional story, a proscenium arch that leads their imaginations into the earth and through the surrounding terrain. - John McPheeIf I'm going to drive safely, I can't do geology. - John McPheeCheck out my Blog for more fossils I've found: http://viewsofthemahantango.blogspot.com/ Link to comment Share on other sites More sharing options...
jkfoam Posted February 28, 2010 Share Posted February 28, 2010 Here are six of mine from here in central Texas and all are Cretaceous in age. The last three photograph show the top or minor valve of a Rudist clam. Since the valve was found unattached I don't know what specie it came from and I have never seen a paper describing just the minor valves. What is interesting is the size of the hinge teeth. They are really not a hinge but fit into a socket on the major valve so the valve opens by rising straight up like a hat off your head. JKFoam 6 1 The Eocene is my favorite Link to comment Share on other sites More sharing options...
Shamalama Posted March 1, 2010 Share Posted March 1, 2010 JKfoam, How big are those fossils in your pictures? -Dave __________________________________________________ Geologists on the whole are inconsistent drivers. When a roadcut presents itself, they tend to lurch and weave. To them, the roadcut is a portal, a fragment of a regional story, a proscenium arch that leads their imaginations into the earth and through the surrounding terrain. - John McPheeIf I'm going to drive safely, I can't do geology. - John McPheeCheck out my Blog for more fossils I've found: http://viewsofthemahantango.blogspot.com/ Link to comment Share on other sites More sharing options...
MOROPUS Posted March 1, 2010 Author Share Posted March 1, 2010 Here are six of mine from here in central Texas and all are Cretaceous in age. The last three photograph show the top or minor valve of a Rudist clam. Since the valve was found unattached I don't know what specie it came from and I have never seen a paper describing just the minor valves. What is interesting is the size of the hinge teeth. They are really not a hinge but fit into a socket on the major valve so the valve opens by rising straight up like a hat off your head. JKFoam Only a point, in case somebody don`t know it. Rudists were are type of vibalve that were really bizarre, and usually lived attached to rock or debris, sometimes forming reefs. They are exclusively from mid Cretaceous, to the really late Cretaceous (becoming extinct at the KT incident). Normally, they are use to ID the cretaceous epoch in wich they are found, due to their rapid evolution and extinction. 1 1 Link to comment Share on other sites More sharing options...
jkfoam Posted March 1, 2010 Share Posted March 1, 2010 Shamalama, The size or height of the fossils pictured are as follows: Monopleura marcida 1 3/4 inches Tucasia patagiata 1 1/2 inches Caprina accidentalis 3 1/2 inches Eoradiolites robustus 2 1/2 inches Monopleura texana 1 1/4 inches Eoradiolites davidsoni 4/1/2 inches Minor valve 3/4 inch across on the long axis Incidently, I believe the minor valve belongs to the genus Monopleura. I need to get out to Van Horn, in west Texas. I understand they have some really big Rudists out there, like 12-14 inches tall and 4-5 inches across. Um, on second thought I really don't like big fossils that much, they take up too much cabinet space. JKFoam 3 The Eocene is my favorite Link to comment Share on other sites More sharing options...
MOROPUS Posted March 1, 2010 Author Share Posted March 1, 2010 Here I post a pic of a famous red marble, found in several quarries along the mid Cretaceous strata, some 25 kilometres from my home This was really well sold rock worldwide,for construction and gardening matters, due to it`s hardeness, during the 1940's until the 1970's. It is veeeeery hard (and when I say hard...Really, believe me!), and full of rudists (white round things; they are cut)forming very big reefs: 2 1 Link to comment Share on other sites More sharing options...
calciteguy Posted April 24, 2013 Share Posted April 24, 2013 There are also some BIG rudist here in Williamson County. Link to comment Share on other sites More sharing options...
Rastellum Posted April 24, 2013 Share Posted April 24, 2013 Cretaceous Rudist.,Radiolites suecicus,Ivö,Sweden 3 1 Link to comment Share on other sites More sharing options...
KansasFossilHunter Posted April 8, 2014 Share Posted April 8, 2014 Bump! Here are some of my Rudists from the Smoky Hill Chalk: I'm sure there are some more Rudists to share! 2 1 Link to comment Share on other sites More sharing options...
Wrangellian Posted April 19, 2014 Share Posted April 19, 2014 Interesting... I have none, though I have Cretaceous sediments here. Apparently it's something of a mystery why they do not occur here on the West Coast! (same with scaphites) 1 Link to comment Share on other sites More sharing options...
Ludwigia Posted April 19, 2014 Share Posted April 19, 2014 Here are a couple from the upper Cretaceous Santonian Gosau layers in the alpine foothills south of Salzburg. Out of curiosity I sliced some of them exposing the inner structure. Makes for an interesting view. A group of Vaccinites sp. Sliced Vaccinites. Hippurites (Batolites) tirolicus Sliced Hippurites. 3 1 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Shamalama Posted April 19, 2014 Share Posted April 19, 2014 Nice! Glad to see this bubbled back up. Since the original post I have been fortunate enough to get some examples from France. Laperousia crateriformis from Magnac, France (Cretaceous, Cenomarian stage) Another one is Radiolites trigeri from the Cretaceous (Turonien) near Charente, France Hippurites from France 3 1 -Dave __________________________________________________ Geologists on the whole are inconsistent drivers. When a roadcut presents itself, they tend to lurch and weave. To them, the roadcut is a portal, a fragment of a regional story, a proscenium arch that leads their imaginations into the earth and through the surrounding terrain. - John McPheeIf I'm going to drive safely, I can't do geology. - John McPheeCheck out my Blog for more fossils I've found: http://viewsofthemahantango.blogspot.com/ Link to comment Share on other sites More sharing options...
Auspex Posted April 19, 2014 Share Posted April 19, 2014 Interesting... I have none, though I have Cretaceous sediments here. Apparently it's something of a mystery why they do not occur here on the West Coast! (same with scaphites) I think Rudists were shallow-water reef-builders; your Cretaceous rocks are from pretty deep water, in general. 1 "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease! Link to comment Share on other sites More sharing options...
Ludwigia Posted April 19, 2014 Share Posted April 19, 2014 I think Rudists were shallow-water reef-builders; your Cretaceous rocks are from pretty deep water, in general. That's correct. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
PRK Posted April 19, 2014 Share Posted April 19, 2014 (edited) The only rudist I have left, is the one I collected in Mexico, during a geology field trip waaaay back when I was in school. I can't seem to find the correct spelling but it is the Cretaceous genus "choraliachama"(sp). Edited April 19, 2014 by PRK 3 Link to comment Share on other sites More sharing options...
Wrangellian Posted April 19, 2014 Share Posted April 19, 2014 I think Rudists were shallow-water reef-builders; your Cretaceous rocks are from pretty deep water, in general. That's a good point, but I think we do have some shallower sediment here, in places.. unless I am interpreting the coarser sediments wrong (they do have a slightly different fauna), maybe it was deposited too quick for reefs to form. We do have solitary corals, are these a deeper critter too? And what about the scaphites? Link to comment Share on other sites More sharing options...
siteseer Posted April 29, 2014 Share Posted April 29, 2014 Wrangellian, There is a site in Baja California. Years ago, I saw some from there and they were well-preserved. Jess Interesting... I have none, though I have Cretaceous sediments here. Apparently it's something of a mystery why they do not occur here on the West Coast! (same with scaphites) Link to comment Share on other sites More sharing options...
Wrangellian Posted April 29, 2014 Share Posted April 29, 2014 Wrangellian, There is a site in Baja California. Years ago, I saw some from there and they were well-preserved. Jess I think I heard something about them in Baja Calif or Calif but not further north. The Wikipedia article characterizes them as being "of the Tethys Ocean". 1 Link to comment Share on other sites More sharing options...
PRK Posted April 29, 2014 Share Posted April 29, 2014 Yeah, I heard that too, now where was that? Link to comment Share on other sites More sharing options...
Ludwigia Posted April 29, 2014 Share Posted April 29, 2014 Here's another one from the Santonian layers in Gosau. I'm not 100% certain on the ID but I've named it Plagioptychus toucasi for the time being. 1 1 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
siteseer Posted April 30, 2014 Share Posted April 30, 2014 There was an article on it in Journal of Paleontology. I think the site was near Punta Gorda - not sure of the name. Someone had a couple of them at Tucson 15-20 years ago. Jess Yeah, I heard that too, now where was that? Link to comment Share on other sites More sharing options...
PRK Posted April 30, 2014 Share Posted April 30, 2014 (edited) What i was insinuating was, I collected it there. It was a fossilized cretaceous reef of rudists near Ensenada. I explained this earlier in this post Edited April 30, 2014 by PRK Link to comment Share on other sites More sharing options...
Tguiri Posted March 2, 2015 Share Posted March 2, 2015 I found this piece in north-northwest San Antonio. I was trying to get it identified and a member identified it as Rudist Durania. May I get the opinions of this Rudist forum to confirm this identification? The size of the entire piece is about 4 inches long by 2-3 inches wide. These images are of different angles of the same piece. 1 1 'There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Link to comment Share on other sites More sharing options...
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