I've come to you guys/gals for help before, and I have come back to ask yet another question.

http://home.gcn.cx/george/rock.bmp

that is a picture of a rock (it makes you download it, i don't know why). I need to know what the name of it is. I think that it's an extrusive igneous rock, but i'm not sure.

Any help would be greatly appreciated.
Thanks in advance
-George