i found it in sarra blonca
2007-09-11 05:24:39 · 6 answers · asked by nathankell9 2 in Science & Mathematics ➔ Earth Sciences & Geology
i found in a place called vally of fires
2007-09-11 05:28:09 · update #1
i found in a place called vally of fires
2007-09-11 05:28:12 · update #2
Valley of Fires is Pliocene to Recent basalt flows, so if you found it there it is probably basalt. Sierra Blanca is an Eocene porphyritic diorite intrusion (if I remember right). There is not much chance of obsidian at either of those locations. Sierra Blanca is 35 miles from the Valley of Fires and if you found it there it might be a hydrothermal deposit like galena.
2007-09-11 09:09:39 · answer #1 · answered by Amphibolite 7 · 0⤊ 0⤋
If it was found in a volcanic area it could be obsidian which is a type of natural glass created by heat and pressure on certain minerals. If you try to chip off a piece and it fractures like glass, that will prove its obsidian. Ancient man used it to make weapons like knives and arrowheads.
2007-09-11 05:36:42 · answer #2 · answered by marcuslycus 2 · 2⤊ 0⤋
Obsidian. (A mere guess, as I don't have a clue where Sarra Blonca is. I guess obsidian can only naturally occur where volcanic emission can reach.)
2007-09-11 05:35:17 · answer #3 · answered by Anonymous · 2⤊ 0⤋
Obsidian - volcanic glass
http://en.wikipedia.org/wiki/Obsidian
2007-09-11 05:29:19 · answer #4 · answered by kano7_1985 4 · 1⤊ 0⤋
your given info is less but because you said it's regular,i think it cannot be Obsidian.
i think it's ether black Apatite or Pyroxene.
2007-09-12 03:57:05 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Might be a lump of coal, if its really light
2007-09-11 05:32:43 · answer #6 · answered by Anonymous · 0⤊ 1⤋