Breezy2428 Posted December 27, 2023 Share Posted December 27, 2023 Hello! I found this near San Antonio, Texas. Could y'all help me out with identification? Link to comment Share on other sites More sharing options...
Rockwood Posted December 27, 2023 Share Posted December 27, 2023 It may be a natural cast of a crustacean burrow. Thalassinoides is the term used for such fossils. The burrows are sometimes thought to be created by crabs. 1 1 Link to comment Share on other sites More sharing options...
JohnJ Posted December 27, 2023 Share Posted December 27, 2023 Although the overall form looks like 'something', it is just eroded limestone full of small marine fossils. 5 The human mind has the ability to believe anything is true. - JJ Link to comment Share on other sites More sharing options...
Rockwood Posted December 27, 2023 Share Posted December 27, 2023 46 minutes ago, JohnJ said: Although the overall form looks like 'something', it is just eroded limestone full of small marine fossils. The soil in my yard is full of such shapes, but the creek next to it is full of burrow casts. How have you so completely ruled out the possibility? Link to comment Share on other sites More sharing options...
JohnJ Posted December 28, 2023 Share Posted December 28, 2023 The San Antonio area karstic rocks and aquifers account for large amounts 'holey' rocks. Freeze/thaw fractures, ancient fires, and other factors break the larger rocks into smaller unusual shapes that are further eroded by the chemistry of rain and soil. As a result, strangely shaped rocks are common in the general area. 6 The human mind has the ability to believe anything is true. - JJ Link to comment Share on other sites More sharing options...
FireAway Posted January 7 Share Posted January 7 I found something similar near San Antonio with the same coloration and texture. About 7 inches long and hard (doesn’t scratch with a nail). Groove on one side as seen in pic. A couple 1/2 inch fractures on one end that make me think it’s or organic origin and may be a bone cast. Any thoughts? Link to comment Share on other sites More sharing options...
Danielb Posted January 7 Share Posted January 7 1 hour ago, FireAway said: I found something similar near San Antonio with the same coloration and texture. About 7 inches long and hard (doesn’t scratch with a nail). Groove on one side as seen in pic. A couple 1/2 inch fractures on one end that make me think it’s or organic origin and may be a bone cast. Any thoughts? Rock has no bone texture. Link to comment Share on other sites More sharing options...
Baking Geologist Posted January 8 Share Posted January 8 10 hours ago, FireAway said: I found something similar near San Antonio with the same coloration and texture. About 7 inches long and hard (doesn’t scratch with a nail). Groove on one side as seen in pic. A couple 1/2 inch fractures on one end that make me think it’s or organic origin and may be a bone cast. Any thoughts? That looks like caliche https://geokansas.ku.edu/caliche#:~:text=Caliche is a broad term,beds that stretch for miles. I got familiar with it while in grad school at UTEP. Link to comment Share on other sites More sharing options...
Mark Kmiecik Posted January 8 Share Posted January 8 16 hours ago, Baking Geologist said: That looks like caliche https://geokansas.ku.edu/caliche#:~:text=Caliche is a broad term,beds that stretch for miles. I got familiar with it while in grad school at UTEP. I've heard it referred to as calcrete. 1 Mark. Fossil hunting is easy -- they don't run away when you shoot at them! 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