U.S. Geological Survey Professional Paper

Alaska augite borehole Bransonia CALL Cambrian Claystone clinopyroxene coal bed compositions compressive deformation deposits Devonian dikes displacement east rift zone Eopteria eruption Euchasma excavation figures Formation fossils gape gastropods genus Geological Survey gratacapi groundmass Hippocardia holotype Horizon and locality Kalaupapa Kalaupapa section KEYBRD Kilauea Koae fault system Kobayashi Kodiak land lavas lb/in² lectotype Left-lateral view Limestone Lower Ordovician magma mantle margin Mauna Mauna Loa middendorffi Grewingk Middle Ordovician minerals mining Miocene Molokai monoplacophorans Mytilus middendorffi oil shale olivine overburden pallial paratype pegma pelecypods percent phenocrysts plagioclase plate Plicatomytilus Pojeta posterior principal stress probe protoconch radial retractor Ribeiria rift zone Right-lateral view rocks rostroconchs samples sandstone sensor shale shell layer showing smectite south flank species specimens strata Stratigraphic stress changes stress concentration SUBROUTINE SUBROUTINE NAME subsidence surface Technophorus tion tunnel TYPE U.S. Geol USNM valves ventral vertical Volcano