The origin of a most contentious rock.
Palin
J Michael
JM
D018534:Earth, Planet; D019015:Geologic Sediments / Q000737:chemistry; D006116:Greenland; D007501:Iron; D019369:Life; D008903:Minerals / Q000032:analysis; D011791:Quartz / Q000032:analysis; D013995:Time
D008903:Minerals; C092478:pyroxene; D011791:Quartz; D007501:Iron