Vnaz50 Posted February 23, 2021 Share Posted February 23, 2021 What causes certain pieces of chert to have a plastic look and texture after an acid test Link to comment Share on other sites More sharing options...
DPS Ammonite Posted February 23, 2021 Share Posted February 23, 2021 (edited) It looks like the “chert” might actually be a carbonate that dissolved in acid creating mini karsts. Will acid still cause the rocks to fizz? Edited February 23, 2021 by DPS Ammonite 1 My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
Vnaz50 Posted February 23, 2021 Author Share Posted February 23, 2021 These don’t fizz any longer Link to comment Share on other sites More sharing options...
JohnJ Posted February 24, 2021 Share Posted February 24, 2021 Chert is not noticeably affected by most acids. Encrusting carbonate material will be removed, but the chert will no be dissolved. These pieces do not look like chert. 1 The human mind has the ability to believe anything is true. - JJ Link to comment Share on other sites More sharing options...
Vnaz50 Posted February 24, 2021 Author Share Posted February 24, 2021 Looks like my yard has some interesting items. All of the shells in my backdrop pic is from the yard also. Link to comment Share on other sites More sharing options...
erose Posted February 25, 2021 Share Posted February 25, 2021 What kind of acid? Chert is silica and not many acids touch that. Link to comment Share on other sites More sharing options...
Vnaz50 Posted February 25, 2021 Author Share Posted February 25, 2021 16 minutes ago, erose said: What kind of acid? Chert is silica and not many acids touch that. Hydrochloric acid Link to comment Share on other sites More sharing options...
LabRatKing Posted February 25, 2021 Share Posted February 25, 2021 48 minutes ago, Vnaz50 said: Hydrochloric acid Hydrochloricwon’t dissolve silica. You would need aquavitae or hydrofloric for that. (Nasty stuff both of them DO NOT TRY at home) To answer your question it is a result of differing densities and variations of composition. Link to comment Share on other sites More sharing options...
Vnaz50 Posted February 26, 2021 Author Share Posted February 26, 2021 1 hour ago, erose said: What kind of acid? Chert is silica and not many acids touch that. Thats why I’m confused. I was told this was chert. However the bucket fizzes when I put it in there. Link to comment Share on other sites More sharing options...
JohnJ Posted February 26, 2021 Share Posted February 26, 2021 Definitely not chert. Most likely dolomitic limestone. 1 The human mind has the ability to believe anything is true. - JJ Link to comment Share on other sites More sharing options...
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