Guest mrmontgom Posted September 28, 2008 Share Posted September 28, 2008 Found these on an outcropping of limestone. At first I thought the long skinny ones were some type of coral, but then I found the oblong 'rocks' that don't appear to have been broken off. Any clues? Thanks. Link to comment Share on other sites More sharing options...
jkfoam Posted September 28, 2008 Share Posted September 28, 2008 I don't see any coral structure in any of them, no septal of calyx structure. They could be concretions or casts of some type of burrow. JKFoam The Eocene is my favorite Link to comment Share on other sites More sharing options...
Auspex Posted September 28, 2008 Share Posted September 28, 2008 Probably concretions/burrow casts/coprolites. You could try cutting & polishing one to look for structure. "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...
JohnJ Posted September 28, 2008 Share Posted September 28, 2008 Associated with the limestone, they could be limonite or degraded pyrite nodules. I see similar nodules in Texas limestone outcrops. The human mind has the ability to believe anything is true. - JJ Link to comment Share on other sites More sharing options...
Guest Nicholas Posted September 28, 2008 Share Posted September 28, 2008 I'm going with nodules or concretions. Also, I have that exact same coin. Link to comment Share on other sites More sharing options...
mommabetts Posted September 28, 2008 Share Posted September 28, 2008 I agree, concretions/burrows/nodules, I too find quite a few of those in limestone outcrops. Link to comment Share on other sites More sharing options...
Guest mrmontgom Posted September 29, 2008 Share Posted September 29, 2008 Thanks for the feedback. Chucked 'em in the trash... Link to comment Share on other sites More sharing options...
MikeD Posted September 29, 2008 Share Posted September 29, 2008 I agree with JohnJ about the degraded pyrite nodules. I have collected some in Texas that look just like that. Where did you get them? Link to comment Share on other sites More sharing options...
Guest mrmontgom Posted September 29, 2008 Share Posted September 29, 2008 Whitewright, Tx (Grayson County). Just walking around and they were laying on the surface. Is that any indication of what might be found underground? Link to comment Share on other sites More sharing options...
MikeD Posted September 29, 2008 Share Posted September 29, 2008 Whitewright, Tx (Grayson County). Just walking around and they were laying on the surface. Is that any indication of what might be found underground? Possibly. The ones I have came from Midlothian, TX. They were found along with some pretty good chunks of pyrite. Some on the surface and some came out of the matrix with the phosphate and the shark teeth in that area from the cement plants. Don't know where all of that formation sticks out around there, but I might keep my eyes peeled for some possible teeth or other stuff. The "good" pyrite I found is not usually shiny until cleaned, but has a purple or green patina to it. I have also found pyrite (or maybe marcasite) in the NSR. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now