New Members DebRae Posted February 20, 2019 New Members Share Posted February 20, 2019 Can someone tell me what this might be? I found it on top of a ridge about 50 feet from the Pedernales River. I live 4 miles outside of Johnson City, Texas on a small ranch. At first I thought it was a boot print of some sort, but it looks too oval-shaped and symmetrical to be a boot print. It weighs about 5 lbs. It's not concrete. We live on a small ranch and it was in a pasture nowhere near where any manmade concrete would be. I have looked in the area where I found this piece and found a small broken piece of what looks like it may have the same markings as this. Any ideas would be helpful. 1 Link to comment Share on other sites More sharing options...
Rayminazzi Posted February 20, 2019 Share Posted February 20, 2019 I'm no expert but it looks like a heavily weathered banded chert nodule 2 Link to comment Share on other sites More sharing options...
ynot Posted February 20, 2019 Share Posted February 20, 2019 I see a wethered concretion. 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...
Herb Posted February 20, 2019 Share Posted February 20, 2019 I agree with a geologic origin "Absence of evidence is not evidence of absence"_ Carl Sagen No trees were killed in this posting......however, many innocent electrons were diverted from where they originally intended to go. " I think, therefore I collect fossils." _ Me "When you have eliminated the impossible, whatever remains, however improbable, must be the truth."__S. Holmes "can't we all just get along?" Jack Nicholson from Mars Attacks Link to comment Share on other sites More sharing options...
New Members DebRae Posted February 21, 2019 Author New Members Share Posted February 21, 2019 Thanks for everyone's replies. Link to comment Share on other sites More sharing options...
Plax Posted February 21, 2019 Share Posted February 21, 2019 may we see the other side please? A close up of the pores would also be nice. Link to comment Share on other sites More sharing options...
New Members DebRae Posted February 21, 2019 Author New Members Share Posted February 21, 2019 Will do today. Thanks. Link to comment Share on other sites More sharing options...
New Members DebRae Posted February 21, 2019 Author New Members Share Posted February 21, 2019 Photo of backside, close-up of backside and close-up of the pores on the front side. Link to comment Share on other sites More sharing options...
Plax Posted February 21, 2019 Share Posted February 21, 2019 We have any sponge experts to tap here on the forum? Link to comment Share on other sites More sharing options...
erose Posted February 21, 2019 Share Posted February 21, 2019 Go here https://www.twdb.texas.gov/groundwater/aquifer/GAT/ and look at the Llano Sheet. See if you can figure out what rock formation you are in. Although the majority of the rocks in the Hill Country are Cretaceous in age there are a lot of outcrops of older Paleozoic rocks in and around JC. The educated guess above that this is just a neatly weathered nodule is a good one. But if you are in one of the Ordovician units then maybe we are looking at a weathered stromatolite. Link to comment Share on other sites More sharing options...
New Members DebRae Posted February 21, 2019 Author New Members Share Posted February 21, 2019 Wow! I've got some research to do! Thanks! Link to comment Share on other sites More sharing options...
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