Question about igneous rocksgreenspun.com : LUSENET : Introductory Geology, Oswego State : One Thread
What is the name for an igneous rock that is coarse-grained, dark gray in color, and contains mostly Ca-rich plagioclase and a lot of ferromagnesian silicates too?
-- Sharon Gabel (email@example.com), October 30, 2002
Well sharon, Gabbro consists of lots of feldspares and mafics and is Calcium rich. If it was fine grain it would be basalt and a bit darker.
-- Paul Roddy (firstname.lastname@example.org), October 31, 2002.