Rocks and Minerals B/C

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Magikarpmaster629
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Re: Rocks and Minerals B/C

Post by Magikarpmaster629 » April 20th, 2017, 6:04 pm

dechirico wrote:Any advice distinguishing diatomite from chalk? I don't have a Rocks & Min box to practice with, so I'm afraid I'm a bit rusty in physical identification.
They give different streaks, although I forgot which one was which...
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Re: Rocks and Minerals B/C

Post by dxu46 » April 20th, 2017, 6:12 pm

Magikarpmaster629 wrote:
dechirico wrote:Any advice distinguishing diatomite from chalk? I don't have a Rocks & Min box to practice with, so I'm afraid I'm a bit rusty in physical identification.
They give different streaks, although I forgot which one was which...
Well, doesn't Chalk (limestone, containing carbonates) effervesce? Diatomite doesn't effervesce, at least. Also, Diatomite is lighter than Chalk (diatoms).

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Re: Rocks and Minerals B/C

Post by Magikarpmaster629 » April 20th, 2017, 6:13 pm

dxu46 wrote:
Magikarpmaster629 wrote:
dechirico wrote:Any advice distinguishing diatomite from chalk? I don't have a Rocks & Min box to practice with, so I'm afraid I'm a bit rusty in physical identification.
They give different streaks, although I forgot which one was which...
Well, doesn't Chalk (limestone, containing carbonates) effervesce? Diatomite doesn't effervesce, at least. Also, Diatomite is lighter than Chalk (diatoms).
If you're given HCl tests, which is certainly not always. But yes, that would work.
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Re: Rocks and Minerals B/C

Post by bhavjain » April 20th, 2017, 8:54 pm

What famous formations should we know? (ex. Giant's Causeway)
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Re: Rocks and Minerals B/C

Post by dxu46 » May 4th, 2017, 3:41 pm

bhavjain wrote:What famous formations should we know? (ex. Giant's Causeway)
You don't need to know them specifically, but you should include info for formations and such in a page for that rock/mineral that the formation is related to. For example, since the Giant's Causeway is made of basalt, in your Basalt section, you should put a picture and a bit of info on the Giant's Causeway.

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