M: Ma Madagascar mafic magma magma chamber magmatism magnesium magnetic magnetic field magnetic north pole magnetic polarity magnetic polarity reversal magnetic pole magnetic reversal magnetic south pole magnetics magnetism magnitude mainshock mammal mammoth manganese manganese oxide mantle mantle plume map map color map key map server map symbol mapping mapping policy marble margin Mariana Trench Marie Curie Marina District marine marine limestone marine organism Marine Realms Information Bank marine sancturary Mars masonry mass mass spectrometer mass wasting mastodon matrix mature Mazatzal Mountains meadow meander measurement mechanical weathering mechanism medial moraine Mediterranean Sea medium bedded sandstone Megannum megmatite melting Memphis Menlo Park Mercury Mesopotamia Mesozoic Mesozoic Era metadata metadata dictionary metal metallic mineral metamorphic facies metamorphic grade metamorphic petrologist metamorphic rock metamorphism meteorite meteorologist meter metering metering equipment methane Mexico Mexico City mica mica schist Michael Faraday Michael Hamer microbe microchip microfilm microfossil microorganism microplate microrganism microscope microscopic crystal microwave microzonation mid-Atlantic ridge mid-ocean ridge mid-oceanic ridge Middle Ages Midwestern United States migrating fluid migration mineral mineral color mineral composition mineral deposit mineral identification mineral resource mineralogy mining Minnesota minute Miocene Mississippi River Mississippian Mitchell Caverns mitigation modeling Moho Mohorovicic' discontinuity moisture Mojave Mojave Desert Mojave River mold mollusk moment magnitude Monterey Monterey Bay Montserrat Moon moraine mosaic moss Mount Everest Mount Katmai Mount Saint Helens Mount St. Helens mountain mouse movement MRIB Mt mud mud crack muddy sediment mudflow multi-cellular organism multi-ringed model multibeam muscovite mutation myth
U.S. Department of the Interior | U.S. Geological Survey URL: http://walrus.wr.usgs.gov/infobank/programs/html/school/M_keywords.html Page Contact: InfoBank staff Page Last Modified: Tue Dec 16 06:27:35 PST 2008 (wcs)