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by zimmy1235
April 13th, 2013, 8:54 am
Forum: 2013 Study Events
Topic: Rocks and Minerals Question Marathon
Replies: 690
Views: 58757

Re: Rocks and Minerals Question Marathon

Is the first one Barite?
by zimmy1235
February 26th, 2013, 6:06 pm
Forum: 2013 Study Events
Topic: Rocks & Minerals B/C
Replies: 116
Views: 20408

Re: Rocks & Minerals B/C

I'm looking at chert and chalcedony, and was wondering if someone could explain the terms microfibrous and microcrystalline, and possibly cryptocrystalline as I don't totally get their difference and how they apply to each of the previous specimens.
by zimmy1235
February 17th, 2013, 9:00 am
Forum: 2013 Study Events
Topic: Fermi Questions C
Replies: 41
Views: 11801

Re: Fermi Questions C

Thank you! I have the scientific notation and most units down I'm more just looking for the obscure units because I've been getting hammered by questions on tests about beardseconds, planck lengths, and such so I wanted to go over those and see what other ones there are.
by zimmy1235
February 16th, 2013, 12:25 pm
Forum: 2013 Study Events
Topic: Fermi Questions C
Replies: 41
Views: 11801

Re: Fermi Questions C

Does anyone have a good in depth list of units that covers all the normal ones and as many obscure units as possible?
by zimmy1235
February 16th, 2013, 9:50 am
Forum: 2013 Study Events
Topic: Rocks and Minerals Question Marathon
Replies: 690
Views: 58757

Re: Rocks and Minerals Question Marathon

Correct, your turn Pleistocene
by zimmy1235
February 15th, 2013, 8:50 am
Forum: 2013 Study Events
Topic: Rocks and Minerals Question Marathon
Replies: 690
Views: 58757

Re: Rocks and Minerals Question Marathon

[img]https://www2.imperial.ac.uk/earthscienceandengineering/rocklibrary/shared/hs_2502_1.JPG[/img] [img]http://www.dinojim.com/Geology/GeoBasics/Images/Sedimentary/Chalk.JPG[/img]
by zimmy1235
February 14th, 2013, 8:37 pm
Forum: 2013 Study Events
Topic: Rocks and Minerals Question Marathon
Replies: 690
Views: 58757

Re: Rocks and Minerals Question Marathon

Sphalerite; main ore of zinc, also used as a gemstone occasionally
by zimmy1235
January 23rd, 2013, 9:19 pm
Forum: 2013 Study Events
Topic: Rocks and Minerals Question Marathon
Replies: 690
Views: 58757

Re: Rocks and Minerals Question Marathon

Both of you have one incorrect mineral
by zimmy1235
January 23rd, 2013, 6:39 pm
Forum: 2013 Study Events
Topic: Rocks and Minerals Question Marathon
Replies: 690
Views: 58757

Re: Rocks and Minerals Question Marathon

[img]http://tinyurl.com/ajpjb7g[/img]
by zimmy1235
January 22nd, 2013, 4:18 pm
Forum: 2013 Study Events
Topic: Rocks and Minerals Question Marathon
Replies: 690
Views: 58757

Re: Rocks and Minerals Question Marathon

Answer|The top one is a barite rose and the bottom one is a gypsum rose. I could tell by the much more defined and sharp edges on the gypsum rose, though a giveaway sign is weight because barite has a much higher specific gravity than gypsum. These rose crystals form when sand is trapped inside the...

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