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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Africa
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West Africa
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Primary terms
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Africa
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Cenozoic
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middle Quaternary (1)
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upper Pleistocene (1)
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upper Quaternary (2)
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Tertiary
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Neogene
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Miocene
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Pebas Formation (1)
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Pliocene (1)
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Paleogene
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Eocene
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lower Eocene
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Willwood Formation (1)
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Oligocene (1)
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Paleocene
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upper Paleocene (1)
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Paleocene-Eocene Thermal Maximum (1)
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Chordata
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Vertebrata
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Pisces
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Chondrichthyes (1)
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Osteichthyes (1)
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Tetrapoda
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Amphibia (1)
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Reptilia
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Archosauria
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volcanic rocks
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inclusions
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intrusions (4)
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Invertebrata
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Arthropoda
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Mandibulata
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Insecta
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Pterygota
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Neoptera
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Endopterygota
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Hymenoptera (2)
-
-
-
-
-
-
-
Mollusca
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Bivalvia
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Heterodonta
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Veneroida
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Veneridae (1)
-
-
-
-
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Protista
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Foraminifera (1)
-
-
-
isotopes
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radioactive isotopes
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C-14 (1)
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Rb-87/Sr-86 (1)
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stable isotopes
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marine geology (1)
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Mesozoic
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Cretaceous
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Lower Cretaceous (1)
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Upper Cretaceous
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Campanian
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Dinosaur Park Formation (1)
-
-
-
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Jurassic
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Middle Jurassic
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Aalenian (1)
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Bajocian (1)
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Upper Jurassic (1)
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Triassic
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metal ores
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Sr/Ca (1)
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strontium
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Rb-87/Sr-86 (1)
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cadmium (1)
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rare earths
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europium (1)
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metamorphic rocks
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metasomatism (5)
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Mexico
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Trans-Mexican volcanic belt (1)
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mineral deposits, genesis (5)
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mineral exploration (3)
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Paleozoic
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Upper Pennsylvanian
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Missourian (1)
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Silurian
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Upper Silurian
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Salina Group (1)
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palynomorphs
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pollen (1)
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petroleum
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petrology (2)
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Phanerozoic (1)
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phosphorus
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organic phosphorus (1)
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placers (1)
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Plantae
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Spermatophyta
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Angiospermae
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Quercus (2)
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plate tectonics (4)
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pollution (2)
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Precambrian
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upper Precambrian
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Proterozoic
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Paleoproterozoic (1)
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planar bedding structures
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cyclothems (1)
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sedimentation (2)
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sediments
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clastic sediments
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boulders (1)
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clay (2)
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soil mechanics (2)
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soils (3)
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South America
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Amazon Basin (1)
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Argentina
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Rio Negro Argentina (1)
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Brazil
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Brazilian Shield (1)
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Goias Brazil (1)
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Chile (1)
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Orinoco River (1)
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stratigraphy (3)
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structural geology (1)
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sulfur (1)
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tectonics (3)
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tectonophysics (1)
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tunnels (1)
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United States
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Bighorn Basin (1)
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California (1)
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Delaware Basin (1)
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Florida (1)
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Forest City Basin (1)
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Idaho (1)
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Illinois (2)
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Illinois Basin (2)
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Iowa (1)
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Michigan
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Michigan Lower Peninsula
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Wayne County Michigan (1)
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Midcontinent (1)
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Missouri (1)
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Nevada
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Carlin Trend (1)
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Oregon
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Grant County Oregon (1)
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Texas
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Loving County Texas (1)
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Marathon Geosyncline (1)
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Reeves County Texas (1)
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West Texas (2)
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Washington (1)
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Wyoming
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Big Horn County Wyoming (1)
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Park County Wyoming (1)
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Washakie County Wyoming (1)
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USSR (2)
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volcanology (1)
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weathering (1)
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rock formations
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Fort Union Formation (2)
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Roraima Formation (1)
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sedimentary rocks
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sedimentary rocks
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carbonate rocks
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limestone (3)
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chemically precipitated rocks
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evaporites
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salt (1)
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clastic rocks
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sandstone (1)
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shale (2)
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sedimentary structures
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sedimentary structures
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planar bedding structures
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cyclothems (1)
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sediments
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sediments
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clastic sediments
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boulders (1)
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clay (2)
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soils
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soils (3)
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Spodosols (1)
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Mano Deposit
Polytypism of cronstedtite from Nižná Slaná, Slovakia
West Africa placer deposits as labeled on the map (Kono, Tongo, Mano and Lo...
Abstract This guidebook volume is a compilation of field excursions offered at the 47th annual meeting of the North-Central Section of the Geological Society of America, held in Kalamazoo, Michigan, May 2013. These field trips examine a wide range of geological time intervals and topics, from Silurian salt, to Cretaceous cosmic impact, to newly interpreted Mississippian–Pennsylvanian Michigan stratigraphy, to Quaternary glacial landscape formation, sand dune development, and present-day coastal bluff stability/erosion issues. Trips geographically range throughout southern Michigan and northern Indiana from Detroit, Michigan, in the east to the Kentland Quarry in Indiana to the west. Early depositional events within the Michigan Basin are examined deep underground in the Detroit Salt Mine (trip leaders: W.B. Harrison III and E.Z. Manos [onsite leader]). This salt mine has been in operation for more than 100 years, and extends for miles beneath the city of Detroit. Kentland Quarry, located in northwest Indiana, is the site of a Cretaceous-aged meteorite impact (trip leader: J.C. Weber). This site allows for surface examination of a similar style impact event that occurred in now buried Ordovician-age (Trenton) rocks located in Cass County, (southwest) Michigan. Mississippian-aged fluvial deposits have been traditionally classified as the youngest bedrock exposed in Michigan. These rocks crop out in the center of the Michigan Basin near Grand Ledge, Michigan (trip leaders: N.B.H. Venable, D.A. Barnes, D.B. Westjohn, and P.J. Voice). Younger, more recently identified, Pennsylvanian rocks will be the subject of a related core workshop at the Michigan Geological Repository for Research and Education (MGRRE) in Kalamazoo (workshop leaders: S. Towne, W.B. Harrison, and D.B. Westjohn). The regional, surficial geology of southwest Michigan is highlighted by three field trips. The first trip details the glacial landforms and sedimentary features formed by the differing dynamics of the Michigan and Saginaw lobes of the Laurentide Ice Sheet (trip leaders: A.E. Kehew, A.L. Kozlowski, B.C. Bird, and J.M. Esch). The two other trips follow along the Lake Michigan eastern shoreline and examine development of sand dune complexes (trip leader: E. Hansen) and present-day, coastal bluff stability and erosion issues (trip leaders: R.B. Chase and J.P. Selegean).