GaRelicHunter Posted June 3, 2017 Share Posted June 3, 2017 I found this in North GA near Rome GA. I don't know what this is, but it has to be something. Link to comment Share on other sites More sharing options...
Rockwood Posted June 3, 2017 Share Posted June 3, 2017 I'm afraid it may be banded chert. Link to comment Share on other sites More sharing options...
GaRelicHunter Posted June 3, 2017 Author Share Posted June 3, 2017 4 minutes ago, Rockwood said: I'm afraid it may be banded chert. Do the bands on banded chert raise up? Look at this thread of the little one in the last photo, they look the same, the ridges on this new rock can be felt also but they aren't as tall Link to comment Share on other sites More sharing options...
Rockwood Posted June 3, 2017 Share Posted June 3, 2017 I doubt it would be diagnostic. Someone better qualified to say more will be along soon. Link to comment Share on other sites More sharing options...
TqB Posted June 3, 2017 Share Posted June 3, 2017 Banded chert was my first thought too. I'm more familiar with European banded flint from the Chalk and the bands are often in raised relief. Try "banded flint" images search. Tarquin Link to comment Share on other sites More sharing options...
Fossildude19 Posted June 3, 2017 Share Posted June 3, 2017 Banded flint example; Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
ynot Posted June 3, 2017 Share Posted June 3, 2017 The minerals included in the "bands" will differ in quantity and mineral included. This will make some layers more susceptible to erosive conditions, and will give the ridged appearance to it. 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...
abyssunder Posted June 4, 2017 Share Posted June 4, 2017 For both topics, my proposal would be the dissipative concretionary overgrowth resembling Westerstetten pattern. "At a much smaller scale, chert concretions in Cretaceous and Tertiary chalks of North Africa (Fig. 9(a) and (b)) are commonly overgrown by chert layers of similar configurations. There is also a certain symmetry between pancakes on the upper and lower side of the nodule, as in Marleik concretions (Fig. 7). Since such overgrowth has never been observed in the millions of chert nodules washed out from the chalk cliffs of Northen Europe, we probably deal with an epigenetic overgrowth caused by silica mobilization under arid conditions. A climatic control is also likely for the Westerstetten karst system, which formed during warm Cretaceous and Tertiary periods, as well as for the Liesegang Rings in Petra sandstones (Fig.3). Nevertheless the rhythmicity of these patterns is probably intrinsic, rather than reflecting climatic or seasonal cycles. " - A. Seilacher excerpt from A. Seilacher. 2001. Concretion morphologies reflecting diagenetic and epigenetic pathways. Sedimentary Geology 143:41-57 " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
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