Tmb85 Posted March 4, 2019 Share Posted March 4, 2019 Need some help ID’ing these two. They are from Walnut Creek in Austin Texas. Both were found in rock beds a few feet from the water. The white one is about 4 inches wide and 3 inches tall. The other is a little over an inch both ways. Link to comment Share on other sites More sharing options...
JohnBrewer Posted March 4, 2019 Share Posted March 4, 2019 They both look geological to me @ynot 1 John Map of UK fossil sites Link to comment Share on other sites More sharing options...
FranzBernhard Posted March 4, 2019 Share Posted March 4, 2019 The first one is a limonitized pyrite or marcasite nodule / concretion. Its not a fossil, but a mineral formation. The second one is tricky! It appears in some ways fossil-like (ridges!), in other ways not (just a pitted piece of limestone). Other members that are familiar with this area may have experience with such stuff from there. And: Welcome to the forum from Austria! Franz Bernhard 1 Link to comment Share on other sites More sharing options...
JohnJ Posted March 4, 2019 Share Posted March 4, 2019 As John mentioned, they are geologic in origin. Franz is also accurate in the details provided. The limestone chunk may be an eroded piece from one of the many spring along the creek. The human mind has the ability to believe anything is true. - JJ Link to comment Share on other sites More sharing options...
FranzBernhard Posted March 4, 2019 Share Posted March 4, 2019 9 minutes ago, JohnJ said: may be an eroded piece from one of the many spring along the creek. That´s indeed a possibility, haven´t thought of that: a rather massiv piece of tufa?! Franz Bernhard Link to comment Share on other sites More sharing options...
Tmb85 Posted March 4, 2019 Author Share Posted March 4, 2019 Awesome. Thanks for the help! Link to comment Share on other sites More sharing options...
ynot Posted March 4, 2019 Share Posted March 4, 2019 Agree with the others, non fossil rocks. Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Auspex Posted March 4, 2019 Share Posted March 4, 2019 Y'know, the first one in particular is very suggestive! Thank you very much for presenting them here; unlike baseball, we like a good swing-and-a-miss as much as a home run. "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...
erose Posted March 5, 2019 Share Posted March 5, 2019 I think the second piece is an eroded chunk of caliche. Link to comment Share on other sites More sharing options...
Zenmaster6 Posted March 5, 2019 Share Posted March 5, 2019 In a nutshell, they are geologic formations, however with a little dash of creativity and imagination, the first one looks like a fossilized pinecone, and the second one looks like a molar tooth Link to comment Share on other sites More sharing options...
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