Ramona Posted March 8, 2020 Share Posted March 8, 2020 When I first looked at this rock I thought it was a bit of concrete, but once I cleaned it up and looked at it with my macro lens I discovered a very different world. I am used to seeing fossiliferous limestone, but the fact that this rock has some completely smooth sides baffles me. Is it just another example of the wonders of limestone? See next post for the size. Found in Huntsville, Alabama. Thanks! Ramona 1 Link to comment Share on other sites More sharing options...
Ramona Posted March 8, 2020 Author Share Posted March 8, 2020 Three more images of the same rock. 2 Link to comment Share on other sites More sharing options...
JamieLynn Posted March 8, 2020 Share Posted March 8, 2020 oooohhhh that raw end is amazing! All the little things! It does look partially quarried. They use fossiliferous limestone here in Texs for buildings often. www.fossil-quest.com Link to comment Share on other sites More sharing options...
Ramona Posted March 8, 2020 Author Share Posted March 8, 2020 5 minutes ago, JamieLynn said: oooohhhh that raw end is amazing! All the little things! It does look partially quarried. They use fossiliferous limestone here in Texs for buildings often. Interesting! I wonder if that is indeed the case with this one, too! Thanks! Link to comment Share on other sites More sharing options...
Ludwigia Posted March 8, 2020 Share Posted March 8, 2020 Chock-a-block full of crinoids, bryozoa and pebbles. 2 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted March 8, 2020 Share Posted March 8, 2020 Very pretty rock full or ramose and fenestellid bryozoans and crinoid columnals. Limestone can split pretty smoothly along bedding planes sometimes and also vertically due to fracture or even chemical erosion as in karst landscapes and limestone pavements. 4 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
FranzBernhard Posted March 9, 2020 Share Posted March 9, 2020 Nice rock, indeed! Thanks for sharing! 7 hours ago, Ludwigia said: pebbles Pebbles (clasts of other rocks) would be nice! I am not sure if I can see any? 6 hours ago, Tidgy's Dad said: limestone pavements Now that´s impressive! Did you decipher the hidden message ? I am sure its the question to the answer "42" . Franz Bernhard 1 Link to comment Share on other sites More sharing options...
Ludwigia Posted March 9, 2020 Share Posted March 9, 2020 2 hours ago, FranzBernhard said: Pebbles (clasts of other rocks) would be nice! I am not sure if I can see any? I thought I did, but maybe I'm wrong. 2 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
FranzBernhard Posted March 9, 2020 Share Posted March 9, 2020 46 minutes ago, Ludwigia said: I thought I did, but maybe I'm wrong. Thank you! Hard to say! There are also some glassy looking cross-sections of components in the same pic. Only personal examination could help, I think. Franz Bernhard Link to comment Share on other sites More sharing options...
michele 1937 Posted March 9, 2020 Share Posted March 9, 2020 I see pieces of Crinoid Link to comment Share on other sites More sharing options...
Ramona Posted March 9, 2020 Author Share Posted March 9, 2020 14 hours ago, Ludwigia said: Chock-a-block full of crinoids, bryozoa and pebbles. I thought I was seeing some pebbles there, but wasn't certain! Link to comment Share on other sites More sharing options...
Ramona Posted March 9, 2020 Author Share Posted March 9, 2020 14 hours ago, Tidgy's Dad said: Very pretty rock full or ramose and fenestellid bryozoans and crinoid columnals. Limestone can split pretty smoothly along bedding planes sometimes and also vertically due to fracture or even chemical erosion as in karst landscapes and limestone pavements. Interesting! When you say ramose, are you referring to ramose coral? Thanks! Ramona Link to comment Share on other sites More sharing options...
Ramona Posted March 9, 2020 Author Share Posted March 9, 2020 4 hours ago, FranzBernhard said: Thank you! Hard to say! There are also some glassy looking cross-sections of components in the same pic. Only personal examination could help, I think. Franz Bernhard Yes, that is what I was wondering. There are some very glassy type components that I am not use to seeing. Would a closer image just of those elements help? Thanks! Ramona Link to comment Share on other sites More sharing options...
Ramona Posted March 9, 2020 Author Share Posted March 9, 2020 3 hours ago, michele 1937 said: I see pieces of Crinoid Yes! I find lots of crinoid pieces around here! And crinoid impression fossils, too! Thanks! Ramona Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted March 9, 2020 Share Posted March 9, 2020 1 hour ago, Ramona said: Interesting! When you say ramose, are you referring to ramose coral? Thanks! Ramona No. Ramose bryozoans. It means branching. As opposed to the net-like fenestellids that are also in your specimen. 1 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
FranzBernhard Posted March 9, 2020 Share Posted March 9, 2020 9 minutes ago, Ramona said: There are some very glassy type components that I am not use to seeing. Would a closer image just of those elements help? I don´t think so. But you can try to scratch one of those glassy things with a knife blade. And for comparison also a crinoid piece. What happens? Franz Bernhard Link to comment Share on other sites More sharing options...
Ramona Posted March 9, 2020 Author Share Posted March 9, 2020 9 hours ago, FranzBernhard said: I don´t think so. But you can try to scratch one of those glassy things with a knife blade. And for comparison also a crinoid piece. What happens? Franz Bernhard If I am actually scratching the correct things (hard to see without my macro lens, LOL) it appears that the glassy things are not scratched but the crinoid pieces are. Does that make sense? 1 Link to comment Share on other sites More sharing options...
Ramona Posted March 9, 2020 Author Share Posted March 9, 2020 9 hours ago, Tidgy's Dad said: No. Ramose bryozoans. It means branching. As opposed to the net-like fenestellids that are also in your specimen. Cool! A new thing to look for! I am pretty good at recognizing the fenestellids, so now I can practice with the ramose bryozoans! Thanks! 2 Link to comment Share on other sites More sharing options...
FranzBernhard Posted March 10, 2020 Share Posted March 10, 2020 6 hours ago, Ramona said: Does that make sense? Yes! The glassy things would be small quartz pebbles than; Mohs hardness of about 7, harder than a knife blade. The crinoid bits are single crystals of calcite; Mohs hardness of about 3, this is much softer than a knife blade. @Ludwigia, you are correct with your suggestion of bebbles! Franz Bernhard 1 Link to comment Share on other sites More sharing options...
Ramona Posted March 25, 2020 Author Share Posted March 25, 2020 On 3/10/2020 at 12:35 AM, FranzBernhard said: Yes! The glassy things would be small quartz pebbles than; Mohs hardness of about 7, harder than a knife blade. The crinoid bits are single crystals of calcite; Mohs hardness of about 3, this is much softer than a knife blade. @Ludwigia, you are correct with your suggestion of bebbles! Franz Bernhard Sorry I missed replying to this! Thanks so much for the help! I am going around scratching my rocks, now. ;-) Ramona Link to comment Share on other sites More sharing options...
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