|
Post by toiv0 on Jan 17, 2017 5:31:15 GMT -5
I just found this geology site and didn't have time to look around until this morning. Pretty interesting for some base info. Has some articles on types of rocks, gems, major impact sites, and just stuff. geology.com/
|
|
|
Post by victor1941 on Jan 17, 2017 9:58:58 GMT -5
The geology.com website has some real interesting articles and was a good find.
|
|
Fossilman
Cave Dweller
Member since January 2009
Posts: 20,709
|
Post by Fossilman on Jan 17, 2017 10:56:35 GMT -5
Going to be my reading material,through this cold snap...Interesting site!
|
|
panamark
fully equipped rock polisher
Member since September 2012
Posts: 1,343
|
Post by panamark on Jan 17, 2017 12:18:19 GMT -5
There is some good stuff on the site, but also some inaccuracies so read with care. I don't think the site is written by a true geologist/scientist as it has a lot of errors.
This particular inaccuracy on their site has been discussed in great detail: "Black is the most common color of obsidian. However, it can also be brown, tan, or green. Rarely, obsidian can be blue, red, orange, or yellow."
No one has been able to document a case of real obsidian in blue. And green, orange and yellow are highly debatable. Many unscrupulous people have tried to sell blue glass as rare obsidian.
|
|