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Meteoric sphaerosiderite lines and their use for paleohydrology and paleoclimatology
Sphaerosiderite, a morphologically distinct millimeter-scale spherulitic siderite (FeCO 3 ), forms predominantly in wetland soils and sediments, and is common in the geologic record. AncientExpand
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The mid-Cretaceous water bearer: isotope mass balance quantification of the Albian hydrologic cycle
A latitudinal gradient in meteoric N 18 O compositions compiled from paleosol sphaerosiderites throughout the Cretaceous Western Interior Basin (KWIB) (34^75‡N paleolatitude) exhibits a steeper, moreExpand
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Late Ordovician (Turinian–Chatfieldian) carbon isotope excursions and their stratigraphic and paleoceanographic significance
Abstract Five positive carbon isotope excursions are reported from Platteville–Decorah strata in the Upper Mississippi Valley. All occur in subtidal carbonate strata, and are recognized in theExpand
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Palaeoclimatic constraints for palaeozoic Palaeolatitudes of Laurentia and Euramerica
Abstract Palaeozoic lithic palaeoclimatic data were plotted at the series or stage level for Laurentia (North America) and Euramerica. Their distribution was used to infer the extent of humid andExpand
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Evidence for increased latent heat transport during the Cretaceous (Albian) greenhouse warming
Quantitative estimates of increased heat transfer by atmospheric H2O vapor during the Albian greenhouse warming suggest that the intensified hydrologic cycle played a greater role in warming highExpand
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Models for circulation patterns in epicontinental seas applied to paleozoic facies of North America craton
Circulation in epicontinental seas develops in response to thermohaline, wind-driven, and tidal motions in various climatic, geographic, and bathymetric settings. Mass balance relations in a seawayExpand
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Middle and Upper Ordovician Paleogeography of the Region Bordering the Transcontinental Arch
Abstract Following a period of Whiterockian erosion, Middle Ordovician seas transgressed into the North American continental interior, and a diachronous sheet of clastic sediments (St. Peter, McLish,Expand
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Carbonate component chemostratigraphy and depositional history of the Ordovician Decorah Formation, Upper Mississippi Valley
The Decorah Formation of eastern Iowa was deposited on an open-marine subtidal shelf near storm wave base. Maximum transgression is represented in organicrich strata of the Guttenberg Member.Expand
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