Rocks and Minerals Question Marathon

[iYOA]

*nvm plz delete this post

[tornado guy]

Here's another one.....

Indentify (Click to Show Hidden Text)

[img]http://upload.wikimedia.org/wikipedia/commons/0/0d/DioriteUSGOV.jpg[/img]

[hexagonaria]

Tentative answer.. (Click to Show Hidden Text)

Is it some kind of pegmatite?

[quizbowl]

I'll take a gander (Click to Show Hidden Text)

Diorite

[hexagonaria]

I'll take a gander (Click to Show Hidden Text)

Diorite

thats what I thought at first but I thought it was too coarse-grained. You could be right though.

[tornado guy]

I'll take a gander (Click to Show Hidden Text)

Diorite

ya...

[quizbowl]

C:

Tell me something I don't know about this

[starfield]

[hide]Rhyolite[/hide]

Something you don't know...
Eruptions of this advanced form of Igneous rock are rare, only 3 eruptions of Rhyolite have been recorded since the 20th century, the eruptions were at the ST. Andrew Strait Volcano in Papua New Guinea, Novarupta Volcano in Alaska, USA and Chaiten in Southern Chile

[hexagonaria]

is this supposed to be easy? Because I've been trying to figure this one out for a while and I can't even figure out what it is.

[quizbowl]

Your guess (Click to Show Hidden Text)

Rhyolite

Something you don't know...
Eruptions of this advanced form of Igneous rock are rare, only 3 eruptions of Rhyolite have been recorded since the 20th century, the eruptions were at the ST. Andrew Strait Volcano in Papua New Guinea, Novarupta Volcano in Alaska, USA and Chaiten in Southern Chile

Good job! And that's quite awesome.