Vnaz50 Posted December 18, 2020 Share Posted December 18, 2020 This one has me stumped also. Link to comment Share on other sites More sharing options...
Kane Posted December 18, 2020 Share Posted December 18, 2020 Location? ...How to Philosophize with a Hammer Link to comment Share on other sites More sharing options...
Vnaz50 Posted December 18, 2020 Author Share Posted December 18, 2020 1 minute ago, Kane said: Location? San Antonio Link to comment Share on other sites More sharing options...
Fossildude19 Posted December 18, 2020 Share Posted December 18, 2020 Rocks, no fossils. 1 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...
Kane Posted December 18, 2020 Share Posted December 18, 2020 My advice is that you look into the bedrock geology of San Antonio, possibly through the USGS (US Geological Survey) to get a better sense of what is available around you. This will help direct your efforts and hopefully lead to fossil goodness! 1 ...How to Philosophize with a Hammer Link to comment Share on other sites More sharing options...
Vnaz50 Posted December 18, 2020 Author Share Posted December 18, 2020 4 minutes ago, Fossildude19 said: Rocks, no fossils. I am ignorant to this and trying to learn as I find things. Would rock wear in socket type position? Link to comment Share on other sites More sharing options...
Fossildude19 Posted December 18, 2020 Share Posted December 18, 2020 They can. It could also be a vug, or a concretion setting. The concretion is removed or dissolved, leaving the cavity. 2 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...
Rockwood Posted December 18, 2020 Share Posted December 18, 2020 Don't these look like faint shell mold fossils ? Link to comment Share on other sites More sharing options...
Ludwigia Posted December 18, 2020 Share Posted December 18, 2020 3 minutes ago, Rockwood said: Don't these look like faint shell mold fossils ? Not to me. 1 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Vnaz50 Posted December 18, 2020 Author Share Posted December 18, 2020 5 minutes ago, Ludwigia said: Not to me. I do know that some of these will dissolve when it comes out of water, and into the air, very rapidly. Almost like it’s in pixels. Link to comment Share on other sites More sharing options...
Kane Posted December 18, 2020 Share Posted December 18, 2020 3 minutes ago, Vnaz50 said: I do know that some of these will dissolve when it comes out of water, and into the air, very rapidly. Almost like it’s in pixels. Fossil shells will not dissolve in air or being exposed to water (unless for a long period of time). The composition of fossil shells usually makes them more resistant to dissolution if they are composed of calcium carbonate. 2 ...How to Philosophize with a Hammer Link to comment Share on other sites More sharing options...
Vnaz50 Posted December 18, 2020 Author Share Posted December 18, 2020 These are the same stones after being in water. Link to comment Share on other sites More sharing options...
Rockwood Posted December 18, 2020 Share Posted December 18, 2020 1 hour ago, Kane said: Fossil shells will not dissolve in air or being exposed to water (unless for a long period of time). The composition of fossil shells usually makes them more resistant to dissolution if they are composed of calcium carbonate. If the carbonate component of a fossil shell was already dissolved out the less soluble replacement minerals would wash away easily. Link to comment Share on other sites More sharing options...
Kane Posted December 18, 2020 Share Posted December 18, 2020 5 minutes ago, Rockwood said: If the carbonate component of a fossil shell was already dissolved out the less soluble replacement minerals would wash away easily. Yes, but usually the matrix erodes first. If we're talking steinkerns, then the whole thing dissolves equally. Thanks. 1 ...How to Philosophize with a Hammer Link to comment Share on other sites More sharing options...
Rockwood Posted December 19, 2020 Share Posted December 19, 2020 7 minutes ago, Kane said: usually Link to comment Share on other sites More sharing options...
Kane Posted December 19, 2020 Share Posted December 19, 2020 17 minutes ago, Rockwood said: Fairly moot in this case. ...How to Philosophize with a Hammer Link to comment Share on other sites More sharing options...
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