Zobrazeno 1 - 10 of 88 pro vyhledávání: '"Paul L. Heller"'
1
Dynamic topography and vertical motion of the U.S. Rocky Mountain region prior to and during the Laramide orogeny
Autor: Lijun Liu, Paul L. Heller
Publikováno v: Geological Society of America Bulletin. 128:973-988
Dynamic topography of Earth’s surface occurs in response to hydrodynamic stresses due to mantle flow beneath a flexible lithosphere. Here, we compare the predicted dynamic topography from an inverse-convection model that includes flat slab subducti
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c6b58891508b883ed22585a8ac33005c
https://doi.org/10.1130/b31431.1
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2
Origins of Bimodal Stratigraphy In Fluvial Deposits: An Example From the Morrison Formation (Upper Jurassic), Western U.S.A
Autor: James I. Drever, S. M. Trampush, Brandon McElroy, Snehalata Huzurbazar, Deidre Ratigan, Paul L. Heller, Atsushi Noda
Publikováno v: Journal of Sedimentary Research. 85:1466-1477
Changes in stacking density of fluvial channel-belt sand bodies are one of the most obvious aspects of alluvial architecture. The proximity of sand bodies to each other has been used as a field criterion to suggest major changes in external factors,
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9df3b2b4bdb8d430acf5e520d60284e3
https://doi.org/10.2110/jsr.2015.93
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3
Paleoslope Reconstruction In Sandy Suspended-Load-Dominant Rivers
Autor: Elizabeth Hajek, Ranie Lynds, Paul L. Heller, David Mohrig
Publikováno v: Journal of Sedimentary Research. 84:825-836
Constraining the depositional gradient of ancient alluvial river systems can aid in reconstructing landscapes and estimating paleodischarge by establishing boundaries on the climatic and tectonic history of continental sequences. We present three met
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b00bc33acf2d4f81822792e261ce0f8f
https://doi.org/10.2110/jsr.2014.60
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4
Middle Cenozoic uplift and concomitant drying in the central Rocky Mountains and adjacent Great Plains
Autor: Paul L. Heller, Brian G. Hough, Majie Fan, Sarah D. Allen
Publikováno v: Geology. 42:547-550
When and how the central Rocky Mountains (Rockies) of western North America gained modern topography remain controversial questions. We reconstruct the middle and late Cenozoic topography along a transect that extends from the Great Plains of western
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8782225b8a968be577bf4f4f8f57f5b7
https://doi.org/10.1130/g35444.1
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5
Evaluation of paleoclimatic conditions east and west of the southern Canadian Cordillera in the mid-late Paleocene using bulk organic δ13C records
Autor: Brady Z. Foreman, Paul L. Heller, Mark T. Clementz
Publikováno v: Palaeogeography, Palaeoclimatology, Palaeoecology. 376:103-113
Carbon isotope records from organic matter provide a key data set for constraining past fluctuations in the isotopic composition of atmospheric carbon dioxide (δ13Catm), hydrologic conditions, and plant community composition. Here we evaluate spatio
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cf6f043c2194ad08a160dbbf59507e57
https://doi.org/10.1016/j.palaeo.2013.02.023
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6
U–Pb detrital zircon geochronology and its implications: The early Late Triassic Yanchang Formation, south Ordos Basin, China
Autor: Paul L. Heller, Xiangyang Xie
Publikováno v: Journal of Asian Earth Sciences. 64:86-98
U–Pb detrital zircon geochronology has been used to identify provenance and document sediment delivery systems during the deposition of the early Late Triassic Yanchang Formation in the south Ordos Basin. Two outcrop samples of the Yanchang Formati
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bff011b4a936e337a1a8b5de6ac94ed6
https://doi.org/10.1016/j.jseaes.2012.11.045
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7
Far-traveled latest Cretaceous-Paleocene conglomerates of the Southern Rocky Mountains, USA: Record of transient Laramide tectonism
Autor: Ken Dueker, Paul L. Heller, Genevive Mathers, Brady Z. Foreman
Publikováno v: Geological Society of America Bulletin. 125:490-498
A solitary, thin, widespread conglomerate is found in latest Cretaceous-Paleocene sections in each of these Laramide basins of the Southern Rockies—the Table Cliff (northwestern Kaiparowits) Plateau and Uinta Basin (Utah), the Piceance Creek and De
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d7f5d94f876fda61e58333fb118a387e
https://doi.org/10.1130/b30699.1
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10
Field test of autogenic control on alluvial stratigraphy (Ferris Formation, Upper Cretaceous-Paleogene, Wyoming)
Autor: Paul L. Heller, Elizabeth Hajek, E. L. Schur
Publikováno v: Geological Society of America Bulletin. 124:1898-1912
Internally generated (autogenic) sedimentary processes can obscure signals of tectonic movements, climate conditions, or sea-level fl uctuations in alluvial basins. The stratigraphic effects of autogenic dynamics have been considered negligible on ti
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e1cf27bf32810d145c5c144a738afd05
https://doi.org/10.1130/b30526.1
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