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Texture after acid test


Vnaz50

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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 by DPS Ammonite
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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.

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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.

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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. 

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Definitely not chert.  Most likely dolomitic limestone.

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