Research Article|October 01, 1954
AVERAGE CHEMICAL COMPOSITIONS OF SOME IGNEOUS ROCKS
GSA Bulletin (1954) 65 (10): 1007-1032.
19 Aug 1953
Average chemical compositions are given for the common plutonic rock types and their volcanic equivalents. An attempt has been made also to give the general average chemical compositions of silicic, intermediate, subsilicic and ultramafic igneous rocks