Geological Society of America Bulletin, Volume 87Geological Society of America, 1976 - Geology Vols. for 1938-61 include as pt. 2 of the December issue the Society's Abstracts, later published separately. |
Contents
981993 | 981 |
Nature and implications of asymmetric seafloor spreading | 994 |
Abrahams | 1016 |
42 other sections not shown
Other editions - View all
Common terms and phrases
America Bull analyses andesite anomalies aragonite axial basalt basement Basin belt biotite calcite caldera carbonate cataclastic Cenozoic clay cleavage composition concentration cores Cretaceous crystals dacite deformation deposits depth diabase dike eastern emplacement Eocene fault feldspar Figure flow folds foliation Formation formed fracture Fresnillo Geology Geophys gneiss grains granitic gravity indicate intrusive Island isotopic Jour Lake late lava layers limestone lineation magma magnetic MANUSCRIPT RECEIVED Massif megabreccia ment metamorphic rocks minerals Miocene Mountains North occur oceanic ophiolite orogeny outcrops Pacific Paleozoic percent phenocrysts plagioclase plate plutonic Precambrian quartz range ratios region Ridge samples schist sedimentary rocks sediments sequence silica slope solution southern specimens stratigraphic structural subduction suggest surface Survey Table tectonic temperature Tertiary thick thrust tion transform faults trench trends tuff turbidites U.S. Geol unit upper Valley volcanic rocks Yukon Crystalline Terrane zone