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all geography including DSDP/ODP Sites and Legs
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Africa
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North Africa
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Western Sahara (1)
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West Africa
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Ghana
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Mauritania (1)
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Asia
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Black Mesa Basin (1)
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Eastern Canada
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Western Canada
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Channeled Scabland (1)
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Europe
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North America
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Basin and Range Province (6)
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Polynesia
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San Francisco Mountain (1)
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United States
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Arizona
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Apache County Arizona (4)
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Kane County Utah (8)
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isotopes
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O-18/O-16 (3)
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Sr-87/Sr-86 (1)
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metals
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Sr-87/Sr-86 (1)
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noble gases
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helium
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oxygen
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O-18/O-16 (3)
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sulfur
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S-34/S-32 (1)
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fossils
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Chordata
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Vertebrata
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Pisces
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Chondrichthyes
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Euselachii (1)
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Tetrapoda
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Amphibia (1)
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Mammalia
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Theria
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Eutheria
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Edentata (2)
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Rodentia
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Myomorpha
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Cricetidae
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Neotoma (1)
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Reptilia
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Diapsida
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Archosauria
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dinosaurs
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Ornithischia (1)
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Synapsida
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ichnofossils
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Invertebrata
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Chelicerata
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Protista
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microfossils
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problematic microfossils (4)
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palynomorphs
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Plantae
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Filicopsida
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thallophytes (2)
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geologic age
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Cenozoic
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Quaternary
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upper Holocene (4)
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Pleistocene
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lower Pleistocene (2)
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upper Quaternary (3)
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Tertiary
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Neogene
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Bidahochi Formation (1)
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Miocene
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lower Miocene (1)
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Pliocene (1)
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Paleogene
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Eocene
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lower Eocene (1)
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Oligocene (2)
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Paleocene
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lower Paleocene
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K-T boundary (2)
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Sespe Formation (1)
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upper Cenozoic (1)
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Mesozoic
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Cretaceous
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Upper Cretaceous
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K-T boundary (2)
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Glen Canyon Group (1)
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Jurassic
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Carmel Formation (1)
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Lower Jurassic (6)
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Middle Jurassic
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Bajocian (1)
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Page Sandstone (7)
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Upper Jurassic
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Entrada Sandstone (1)
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Kayenta Formation (3)
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lower Mesozoic (1)
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Navajo Sandstone (9)
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Triassic
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Lower Triassic
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Permian-Triassic boundary (1)
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Moenkopi Formation (2)
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Upper Triassic
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Chinle Formation (3)
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Wingate Sandstone (1)
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Paleozoic
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Cambrian
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Middle Cambrian
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Bright Angel Shale (1)
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Tapeats Sandstone (3)
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Carboniferous
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Redwall Limestone (1)
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Upper Mississippian (2)
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Pennsylvanian
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Lower Pennsylvanian (1)
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Watahomigi Formation (1)
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Ordovician
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Viola Limestone (1)
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Permian
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Coconino Sandstone (4)
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Esplanade Sandstone Member (1)
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Guadalupian (1)
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Kaibab Formation (4)
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Lower Permian (1)
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Middle Permian (1)
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Upper Permian
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Permian-Triassic boundary (1)
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Supai Formation (1)
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Phanerozoic (1)
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Precambrian
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Archean (1)
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Chuar Group (11)
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Unkar Group (12)
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upper Precambrian
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Proterozoic
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Mesoproterozoic (5)
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Neoproterozoic
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Cryogenian (1)
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Paleoproterozoic (4)
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igneous rocks
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igneous rocks
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plutonic rocks
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lamprophyres
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ultramafics
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peridotites (1)
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volcanic rocks
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basalts
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flood basalts (1)
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pyroclastics
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scoria (3)
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tuff (2)
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rhyolites (1)
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metamorphic rocks
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metamorphic rocks
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metaigneous rocks (1)
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metasedimentary rocks (4)
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metavolcanic rocks (1)
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schists (2)
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-
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meteorites
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meteorites
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iron meteorites
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minerals
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molybdates
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powellite (1)
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organic minerals (1)
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oxalates (1)
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phosphates
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apatite (4)
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monazite (1)
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silicates
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framework silicates
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feldspar group
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alkali feldspar
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K-feldspar (3)
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sanidine (1)
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silica minerals
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coesite (1)
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lechatelierite (1)
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stishovite (1)
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orthosilicates
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nesosilicates
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olivine group
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olivine (2)
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zircon group
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zircon (11)
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-
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sheet silicates
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mica group
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biotite (1)
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sulfates
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barite (1)
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gypsum (1)
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halotrichite (1)
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vanadates
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carnotite (1)
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-
-
Primary terms
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absolute age (26)
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Africa
-
North Africa
-
Western Sahara (1)
-
-
West Africa
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Ghana
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Bosumtwi Crater (1)
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Mauritania (1)
-
-
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Asia
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Indian Peninsula
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India
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Maharashtra India
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Lonar Crater (2)
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asteroids (1)
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bibliography (3)
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biogeography (1)
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biography (1)
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Canada
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Eastern Canada
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Quebec (1)
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Western Canada
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Alberta (1)
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Northwest Territories
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Tuktoyaktuk Peninsula (1)
-
-
-
-
carbon
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C-13/C-12 (4)
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C-14 (5)
-
-
catalogs (2)
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Cenozoic
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Quaternary
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Holocene
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upper Holocene (4)
-
-
Pleistocene
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lower Pleistocene (2)
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upper Pleistocene
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Wisconsinan (1)
-
-
-
upper Quaternary (3)
-
-
Tertiary
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Neogene
-
Bidahochi Formation (1)
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Miocene
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lower Miocene (1)
-
-
Pliocene (1)
-
-
Paleogene
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Eocene
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lower Eocene (1)
-
-
Oligocene (2)
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Paleocene
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lower Paleocene
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K-T boundary (2)
-
-
-
Sespe Formation (1)
-
-
-
upper Cenozoic (1)
-
-
Chordata
-
Vertebrata
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Pisces
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Chondrichthyes
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Euselachii (1)
-
-
-
Tetrapoda
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Amphibia (1)
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Mammalia
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Theria
-
Eutheria
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Edentata (2)
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Rodentia
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Myomorpha
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Cricetidae
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Neotoma (1)
-
-
-
-
-
-
-
Reptilia
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Diapsida
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Archosauria
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dinosaurs
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Ornithischia (1)
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Saurischia
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Sauropodomorpha (1)
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Theropoda (2)
-
-
-
-
-
Synapsida
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Therapsida (1)
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clay mineralogy (1)
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climate change (4)
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continental drift (1)
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coprolites (2)
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crust (11)
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crystal growth (1)
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crystal structure (2)
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crystallography (1)
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data processing (6)
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deformation (4)
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diagenesis (3)
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Earth (1)
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earthquakes (9)
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East Pacific Ocean Islands
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Hawaii
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Maui County Hawaii
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Maui (1)
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environmental geology (1)
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Europe
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Central Europe
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Germany
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Bavaria Germany
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Western Europe
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faults (30)
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foliation (2)
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geochemistry (13)
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geochronology (8)
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geomorphology (19)
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geophysical methods (7)
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ground water (6)
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heat flow (2)
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hydrology (9)
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ichnofossils
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Eubrontes (1)
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Grallator (1)
-
-
igneous rocks
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plutonic rocks
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diabase (2)
-
lamprophyres
-
minette (1)
-
-
ultramafics
-
peridotites (1)
-
-
-
volcanic rocks
-
basalts
-
flood basalts (1)
-
-
pyroclastics
-
scoria (3)
-
tuff (2)
-
-
rhyolites (1)
-
-
-
intrusions (6)
-
Invertebrata
-
Arthropoda
-
Chelicerata
-
Arachnida (1)
-
-
-
Mollusca
-
Cephalopoda
-
Ammonoidea (1)
-
-
-
Protista
-
Foraminifera (1)
-
Thecamoeba (1)
-
-
-
isostasy (1)
-
isotopes
-
radioactive isotopes
-
C-14 (5)
-
-
stable isotopes
-
C-13/C-12 (4)
-
He-3 (1)
-
O-18/O-16 (3)
-
S-34/S-32 (1)
-
Sr-87/Sr-86 (1)
-
-
-
lava (10)
-
magmas (4)
-
mantle (2)
-
maps (3)
-
Mesozoic
-
Cretaceous
-
Upper Cretaceous
-
K-T boundary (2)
-
-
-
Glen Canyon Group (1)
-
Jurassic
-
Carmel Formation (1)
-
Lower Jurassic (6)
-
Middle Jurassic
-
Bajocian (1)
-
Page Sandstone (7)
-
-
Upper Jurassic
-
Entrada Sandstone (1)
-
-
-
Kayenta Formation (3)
-
lower Mesozoic (1)
-
Navajo Sandstone (9)
-
Triassic
-
Lower Triassic
-
Permian-Triassic boundary (1)
-
-
Moenkopi Formation (2)
-
Upper Triassic
-
Chinle Formation (3)
-
-
-
Wingate Sandstone (1)
-
-
metal ores
-
uranium ores (1)
-
-
metals
-
actinides
-
uranium (1)
-
-
alkaline earth metals
-
barium (1)
-
strontium
-
Sr-87/Sr-86 (1)
-
-
-
arsenic (1)
-
copper (1)
-
lead (1)
-
molybdenum (1)
-
nickel (1)
-
rare earths (1)
-
vanadium (1)
-
-
metamorphic rocks
-
metaigneous rocks (1)
-
metasedimentary rocks (4)
-
metavolcanic rocks (1)
-
schists (2)
-
-
metamorphism (5)
-
meteorites
-
iron meteorites
-
octahedrite
-
Canyon Diablo Meteorite (1)
-
-
-
-
Mexico
-
Michoacan Mexico
-
Paricutin (1)
-
-
-
mineral deposits, genesis (1)
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mineral resources (1)
-
mineralogy (2)
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minerals (1)
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Mohorovicic discontinuity (1)
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Moon (3)
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noble gases
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helium
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He-3 (1)
-
-
-
North America
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Basin and Range Province (6)
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North American Cordillera (1)
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Western Interior (1)
-
-
Oceania
-
Polynesia
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Hawaii
-
Maui County Hawaii
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Maui (1)
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-
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oil and gas fields (1)
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orogeny (5)
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oxygen
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O-18/O-16 (3)
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paleobotany (1)
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paleoclimatology (7)
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paleoecology (10)
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paleogeography (12)
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paleomagnetism (5)
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paleontology (7)
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Paleozoic
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Cambrian
-
Middle Cambrian
-
Bright Angel Shale (1)
-
-
Tapeats Sandstone (3)
-
-
Carboniferous
-
Mississippian
-
Redwall Limestone (1)
-
Upper Mississippian (2)
-
-
Pennsylvanian
-
Lower Pennsylvanian (1)
-
Watahomigi Formation (1)
-
-
-
Ordovician
-
Viola Limestone (1)
-
-
Permian
-
Coconino Sandstone (4)
-
Esplanade Sandstone Member (1)
-
Guadalupian (1)
-
Kaibab Formation (4)
-
Lower Permian (1)
-
Middle Permian (1)
-
Upper Permian
-
Permian-Triassic boundary (1)
-
-
-
Supai Formation (1)
-
-
palynomorphs
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acritarchs (2)
-
-
petroleum (1)
-
petrology (3)
-
Phanerozoic (1)
-
phase equilibria (1)
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Plantae
-
algae (3)
-
Pteridophyta
-
Filicopsida
-
Pecopteris (1)
-
-
Lycopsida
-
Lepidodendron (1)
-
Stigmaria (1)
-
-
Sphenopsida
-
Equisetales
-
Calamites (1)
-
-
-
-
-
plate tectonics (5)
-
pollution (1)
-
Precambrian
-
Archean (1)
-
Chuar Group (11)
-
Unkar Group (12)
-
upper Precambrian
-
Proterozoic
-
Mesoproterozoic (5)
-
Neoproterozoic
-
Cryogenian (1)
-
-
Paleoproterozoic (4)
-
-
-
-
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GeoRef Categories
Era and Period
Epoch and Age
Book Series
Date
Availability
Coconino County Arizona
Alterite and Magnesioalterite, Two New Oxalate Minerals, from the Vermillion Cliffs, Coconino County, Arizona, USA Available to Purchase
Anthropogenic influence on groundwater geochemistry in Horn Creek Watershed near the Orphan Mine in Grand Canyon National Park, Arizona, USA Open Access
Runoff required to drive postimpact gully development on the walls of Meteor Crater (Arizona, USA) Available to Purchase
Polygonal linear depressions in the Coconino Sandstone (Permian) of Arizona, and their relevance for interpreting paleoenvironment Open Access
Active seismic exploration along a human lunar mission traverse analogue in the San Francisco volcanic field Available to Purchase
Zircon (U-Th)/He thermochronology reveals pre-Great Unconformity paleotopography in the Grand Canyon region, USA: REPLY Open Access
Zircon (U-Th)/He thermochronology reveals pre-Great Unconformity paleotopography in the Grand Canyon region, USA: COMMENT Open Access
Comparative morphometric analysis suggests ice-cored pingo-shaped landforms on the dwarf planet Ceres Open Access
WEATHERING PITS VERSUS TRAMPLE MARKS: A REINTERPRETATION OF THE “DINOSAUR DANCE FLOOR”: A JURASSIC NAVAJO SANDSTONE SURFACE IN THE VERMILION CLIFFS NATIONAL MONUMENT, ARIZONA Available to Purchase
Realignments of the Colorado River by ∼2 m.y. of rotational bedrock landsliding: The Surprise Valley landslide complex, Grand Canyon, Arizona Open Access
Zircon (U-Th)/He thermochronology reveals pre-Great Unconformity paleotopography in the Grand Canyon region, USA Open Access
Geodynamic significance of a buried transient Carboniferous landscape Available to Purchase
ABSTRACT Rampart craters are omnipresent features on volatile-rich solid planetary surfaces. This raises the question whether, and how many, rampart craters are present on Earth. We reviewed the terrestrial impact crater record with regard to possible rampart morphologies and present detailed morphological analyses of these terrestrial craters here. Our results show that the Ries crater in Germany, Bosumtwi crater in Ghana, Tenoumer crater in Mauritania, Lonar crater in India, and Meteor crater in the United States are terrestrial rampart craters. The Ries and Bosumtwi craters can be classified as double-layer ejecta (DLE) craters, whereas Tenoumer, Lonar, and Meteor craters can be classified as single-layer ejecta (SLE) craters. Tenoumer and Meteor craters show rampart as well as common lunar-like ejecta characteristics within their ejecta blankets and, thus, appear to be hybrid craters. In addition, we discuss seven crater structures that show at least some morphological or lithological peculiarities that could provide evidence for possible ejecta ramparts. Considering the low number of terrestrial impact craters with well-preserved ejecta blankets, the relatively high proportion of rampart craters is astonishing. Obviously, the formation of layered or rampart craters is a common and not a rare process on Earth.
Early Pleistocene–to–present paleoclimate archive for the American Southwest from Stoneman Lake, Arizona, USA Available to Purchase
Petrogenesis of the 91-Mile peridotite in the Grand Canyon: Ophiolite or deep-arc fragment? Open Access
Detrital sanidine 40 Ar/ 39 Ar dating confirms <2 Ma age of Crooked Ridge paleoriver and subsequent deep denudation of the southwestern Colorado Plateau Open Access
Estimating the contribution of tributary sand inputs to controlled flood deposits for sandbar restoration using elemental tracers, Colorado River, Grand Canyon National Park, Arizona Available to Purchase
Evaluating the Shinumo-Sespe drainage connection: Arguments against the “old” (70–17 Ma) Grand Canyon models for Colorado Plateau drainage evolution Open Access
A comprehensive anatomical and phylogenetic evaluation of Dilophosaurus wetherilli (Dinosauria, Theropoda) with descriptions of new specimens from the Kayenta Formation of northern Arizona Available to Purchase
Journey to the Grand Canyon: A geologic and hydrologic excursion across Arizona’s magnificent heartland Available to Purchase
ABSTRACT The Grand Canyon is perhaps our planet’s most widely recognized and single most important geologic landform. The goals for this trip are to give participants an understanding of the canyon’s formation and its dynamic hydrologic system. While our destination is clear, the journey will also provide opportunities to discuss Arizona’s larger geologic setting within the Basin and Range, Transition Zone, and Colorado Plateau physiographic provinces. Stops and discussions will include: (1) geologic setting and groundwater environment of the Phoenix basin; (2) Cenozoic landscape development of the Transition Zone; (3) Montezuma Well, a unique arid-land spring contained within a travertine mound; (4) ascent of the Mogollon Rim, the state’s second largest landform and entryway to the Colorado Plateau; (5) the San Francisco Volcanic Field and surrounding volcanic features, including Sunset Crater, a late Holocene scoria cone; and (6) multiple stops in Grand Canyon National Park to discuss its varied geology. The principal focus here will be on evolving concepts of the canyon’s formation since the time of John Wesley Powell, including the flurry of research results proffered in the past 20 years. Participants will walk the Trail of Time, Earth’s largest man-made geologic exhibit at over 2 km. Another equally important discussion will cover the modern hydrologic system of the canyon, which yields a tenuous supply of potable water from a single inner-canyon spring for over six million annual visitors and 2,500 full-time residents. The National Park Service has prioritized the replacement of the Trans-Canyon Waterline due to climate change concerns.