Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 16 of 16 for “"nonmarine"”.
-
Quantifying periods of diffusion in marine and nonmarine vertebrate fossils using rare earth elements
Concentrations of rare earth (REE), U, Th, and other trace elements (TE) were measured using LA-ICP-MS along transects across five Late Eocene brontothere bones from the terrestrial Late Eocene Chadron Formation of Nebraska and four Miocene marine mammals from the Atlantic Coastal Plain. Samples …
-
The Lower Pennsylvanian New River Formation: a Nonmarine Record of Glacioeustasy in a Foreland Basin
… Appalachian Basin consist predominantly of nonmarine, coal-bearing facies that developed within a fluvio-estuarine, trunk-tributary drainage system in a foreland-basin setting. Sheet-like, sandstone-mudstone bodies (up to 100 km wide and 70 m thick) developed in an axial trunk drainage …
-
Stratigraphy, Depositional History, and Brachiopod Paleontology of Virgilian Strata of East-Central Illinois
… Illinois consists of alternating marine and nonmarine strata divided into eight modified cyclothems: Omega, Shumway, Bogota, Newton, Mint Creek, Greenup, Toledo, and Woodbury. The modified cyclothems are recognized with lower boundaries at top of coal or base of the lowest marine stratum. The …
-
Molluscan paleontology of the Pliocene Peace Valley "beds" and Ridge Route "formation" (Ridge Basin group), Ridge Basin, southern California
… than 600 m of section were measured.</p> <p>The nonmarine molluscs of the Ridge Route "formation" and Peace Valley "beds" consist of ten species: one unionid, Anodonta oregonensis (Lea); three sphaeriids, Musculium lacustre (Muller), M. transversum (Say), and Pisidium (Cyclocalyx) nitidum Jenyns; …
-
Sedimentological constraints on Middle Miocene extensional tectonism of the southern Las Vegas Range, southern Nevada
… is 335-m-thick and consists of interbedded nonmarine limestone, siltstone, sandstone, conglomerate, megabreccia, and volcanic ash. The formation represents deposition in a shallow, permanent lake 12 to 16 Ma. Post 12 Ma, the formation was faulted by north-striking, normal faults. …
-
Revision and description of Keuper (Middle Ladinian to Rhaetian) invertebrate trace fossils from the southern part of the Germanic Basin and studies of related material
… composed of rocks representing various nonmarine environments dominated by red-bed facies. The Würzburg Formation, the Stuttgart Formation, and the Hassberge Formation, all representing deposits of extended river systems, contain the richest ichnofauna. Trace fossil abundance is …
-
High-resolution temporal records of magmatism, sedimentation, and faulting at evolving plate boundaries
… Chapter 1 creates a regional stratigraphy for nonmarine sedimentary and volcanic rocks throughout central and western Washington and demonstrates that the depositional history of these rocks is consistent with accretion of over thickened oceanic crust (Siletzia terrane) and passage of a …
-
Basin analysis of Tertiary strata in the Pattani Basin Gulf of Thailand
… Miocene regressive package comprises marine to nonmarine sediments. Deposition of the synrift sequences corresponded to rifting and extension which included episodic block faulting and rapid subsidence. Post-rift succession comprises: 1) an Early to Middle Miocene regressive package of shallow …
-
Reconstructing long term sediment flux from the Brooks Range, Alaska using shelf edge clinoforms
… km3) were simulated. Sediment flux, marine and nonmarine diffusivities, and basin subsidence were systematically varied until a match was found for the foreset and topset slopes, as well as progradation rates over a 6 milion year period. The ability of STRATA to match the seismically interpreted …
-
Reconstructing long term sediment flux from the Brooks Range, Alaska, using edge clinoforms
… km3) were simulated. Sediment flux, marine and nonmarine diffusivities, and basin subsidence were systematically varied until a match was found for the foreset and topset slopes, as well as progradation rates over a 6 million year period. The ability of STRATA to match the seismically …
-
Geochemical Approaches to Paleobiology, Paleoclimatology, and Chronostratigraphy of the Cretaceous Cloverly Formation
… comparisons with other late-Early Cretaceous nonmarine deposits. I examine the ecohydrology and paleoenvironment of a local Cloverly fossil assemblage by analyzing the 18O of biogenic phosphates from a large set of vertebrate fossils. This has resulted in the first quantitative surface-air …
-
Paleozoology of cores from the Tyler Formation (Pennsylvanian) in North Dakota, U.S.A.
… 1 insect, and 1 echinoderm. Chordates include 1 "nonmarine" shark, at least 1 paleoniscoid fish, and 1 possible crossopterygian fish. A new genus and species of eocarid malacostracan is described and represents the first report of the family Tealliocarididae from. North .America and the first …
-
Origin and stratigraphic architecture of the Middle Permian lower and upper Quanzijie low-order cycles, Bogda Mountains, NW China
… in time-stratigraphic analysis of complex nonmarine fluvial-lacustrine strata. In the second part of this work, the depositional environments of the upper QZJ LC are interpreted as a mixture of meandering and ephemeral stream and loess deposits. Loess in the region is poorly-documented and …
-
SOURCE AND MATURATION OF HYDROCARBONS IN THE FRIO FORMATION OF THE HUMBLE FIELD, SOUTHEAST-TEXAS GULF COAST BASIN
… and Woodbine formations, which also deposited in nonmarine-marine transitional environment and are consistent with predicted geologic ages. Comparison of the Humble oils with the South Liberty oils (Banga et al., 2011) and Brazoria oils (Guo, 2004) show they belong to one single genetic family …
-
Heavy minerals of the Cretaceous Hell Creek and Paleocene Ludlow Formations of Slope and Bowman counties, North Dakota
… Formations of southwestern North Dakota are nonmarine sediments of alluvial origin. The heavy minerals of these formations were specifically studied to determine the source rock types and their provenance, and generally assess the diagenetic processes which affected the heavy minerals. …
-
Fluvial sedimentation in continental half-graben basins
The stratigraphic architecture of intracontinental rift basins is defined by a dynamic relationship between depositional belts associated with the basin floor and flanking tributary streams on the piedmont. Spatiotemporal distributions of these deposits are sensitive to basin geometry, subsidence …