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Re: Rocks and Minerals B/C
Posted: April 20th, 2017, 6:04 pm
by Magikarpmaster629
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...
Re: Rocks and Minerals B/C
Posted: April 20th, 2017, 6:12 pm
by dxu46
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).
Re: Rocks and Minerals B/C
Posted: April 20th, 2017, 6:13 pm
by Magikarpmaster629
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.
Re: Rocks and Minerals B/C
Posted: April 20th, 2017, 8:54 pm
by bhavjain
What famous formations should we know? (ex. Giant's Causeway)
Re: Rocks and Minerals B/C
Posted: May 4th, 2017, 3:41 pm
by dxu46
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.