BLT Posted October 25, 2018 Share Posted October 25, 2018 This is another middle Tennessee creek find. (Mississippian, St. Louis Limestone & Warsaw Limestone) I thought it might be a fossilized sponge? If so, what are the tiny whitish specks embedded in it? Link to comment Share on other sites More sharing options...
BLT Posted October 25, 2018 Author Share Posted October 25, 2018 Link to comment Share on other sites More sharing options...
BLT Posted October 25, 2018 Author Share Posted October 25, 2018 Link to comment Share on other sites More sharing options...
Paciphacops Posted October 25, 2018 Share Posted October 25, 2018 Hard to really say for sure, but I'm thinking it may be deeply weathered chert. "Don't force it, just use a bigger hammer" Link to comment Share on other sites More sharing options...
BLT Posted October 25, 2018 Author Share Posted October 25, 2018 Just now, Paciphacops said: Hard to really say for sure, but I'm thinking it may be deeply weathered chert. Hmm. Really? I wasn’t expecting that! Lol. Thanks! Link to comment Share on other sites More sharing options...
ynot Posted October 25, 2018 Share Posted October 25, 2018 I see no conchoidal fracture or any other indicators of chert. It looks like a low grade sandstone or maybe a metamorphic rock. I see no fossils in it. 1 Link to comment Share on other sites More sharing options...
Innocentx Posted October 25, 2018 Share Posted October 25, 2018 It looks porous. How would you describe the weight of it for it's size? "Journey through a universe ablaze with changes" Phil Ochs Link to comment Share on other sites More sharing options...
Paciphacops Posted October 25, 2018 Share Posted October 25, 2018 Under the right conditions, chert will eventually weather into a material that resembles a fine grained, porous sandstone. I have seen lots of similar material in soils from the weathering of the St. Louis limestone. It can become very light and friable when weathered long enough. 2 "Don't force it, just use a bigger hammer" Link to comment Share on other sites More sharing options...
Innocentx Posted October 25, 2018 Share Posted October 25, 2018 15 minutes ago, Paciphacops said: I have seen lots of similar material in soils from the weathering of the St. Louis limestone. It can become very light and friable when weathered long enough. Is the soil acidic there? "Journey through a universe ablaze with changes" Phil Ochs Link to comment Share on other sites More sharing options...
BLT Posted October 25, 2018 Author Share Posted October 25, 2018 42 minutes ago, Innocentx said: It looks porous. How would you describe the weight of it for it's size? It is rather heavy for the size of it. 1 Link to comment Share on other sites More sharing options...
Paciphacops Posted October 25, 2018 Share Posted October 25, 2018 1 minute ago, Innocentx said: Is the soil acidic there? Yes, the St. Louis (and Warsaw) derived soils cover the surface on much of the Highland Rim plateau. They are typically cherty red clay with a pH around 5-5.5. Good for growing blueberries, but only if you add LOTS of organic matter. 2 "Don't force it, just use a bigger hammer" Link to comment Share on other sites More sharing options...
Herb Posted October 25, 2018 Share Posted October 25, 2018 looks like weathered limestone to me with bits of broken calcite (maybe broken crinoid stem) bits in it 1 "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...
BLT Posted October 25, 2018 Author Share Posted October 25, 2018 Thanks! Link to comment Share on other sites More sharing options...
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