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Showing 1 to 20 of 33 for “"Fluvial deposits"”.
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Variations in the architecture of fluvial deposits within a marginal marine setting, Eocene Sobrarbe and Escanilla formations, Spain
Fluvial systems located near marginal-marine settings are prolific hydrocarbon reservoirs around the world. Outcrops that contain strata that can be correlated from fluvial deposits to coevally deposited marginal marine deposits are important because they provide a rare opportunity to relate …
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Paleoenvironmental Variability across the Cretaceous-Tertiary Boundary in the Alberta Foreland Basin, as Interpreted from Fluvial Deposits and Paleosols, Red Deer River Valley, Alberta, Canada.
… (KT) boundary of south-central Alberta indicates fluvial aggradation and variability of paleosol morphology in response to foreland orogenesis. The depositional history records an evolution from amalgamated, multi-story, braided sand bodies to accretionary, single-story, overbank-prone meandering …
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Investigating rates and mechanisms of lateral erosion in a small bedrock river using erosion pins, structure-from-motion photogrammetry, and optically stimulated luminescence dating: Konza Prairie, northeast Kansas
… the mechanics of vertical bedrock incision, the fluvial processes driving lateral bedrock erosion and the timescales over which it occurs remain poorly understood. In order to advance our understanding of how bedrock rivers erode laterally over time, I investigated past and present erosion rates …
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Surface geology for land use planning, Minot, North Dakota area
… Formation, Pleistocene glacial till, ice contact fluvial deposits, and other fluvial deposits of the Coleharbor Group, and Holocene fluvial and eolian deposits of the Oahe Formation.</p> <p>Expansion of the Minot metropolitan area has resulted in conflict between urban development and planned …
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A Paleontological Study of Pedimeant Gravels of Southwestern North Dakota Which Exhibit Evidence of PermaFrost Activity
… photos. The molluscan fauna collected from the fluvial deposits which cover the pediment surfaces indicates that there was a relatively warm, moist climate during the time of deposition. Because of paleontological, topographic, and geomorphic evidence, it is suggested that the two sites of …
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Fault segmentation, fault linkage, and hazards along the Sevier fault, southwestern Utah
… a downward decrease in space between faults. (3) Fluvial deposits indicate three downcutting stages of a south-flowing stream. Some slip along the Sevier fault occurred after the first two stages and tilted the deposits. (4) 570 ka basalt is offset ∼3 m. Thus, the young slip rate is 0.018 …
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Cosmogenic dating of fluvial terraces in the Sorbas Basin, SE Spain
Long term fluvial incision spanning the Late Cenozoic is recorded in many fluvial systems around the world by terrace landform sequences. The incision manifests itself as inset sequences of river terraces which form terrace staircases. The timing of the onset of incision and the rate incision then …
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Tertiary Sediments of the Big Hole Valley and Pioneer Mountains, Southwestern Montana: Age, Provenance, and Tectonic Implications
… debris flows, small alluvial channels, and rare fluvial deposits. U-Pb geochronology of detrital zircons and air-fall tuffs indicates the presence of Oligocene to Middle Miocene sedimentary rocks outcropping at the surface. Though the presence of detrital muscovite in several outcrops indicates …
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Tertiary Sediments of the Big Hole Valley and Pioneer Mountains, Southwestern Montana: Age, Provenance, and Tectonic Implications
… debris flows, small alluvial channels, and rare fluvial deposits. U-Pb geochronology of detrital zircons and air-fall tuffs indicates the presence of Oligocene to Middle Miocene sedimentary rocks outcropping at the surface. Though the presence of detrital muscovite in several outcrops indicates …
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Fluvial processes, beaver activity, and climate in the greater Yellowstone ecosystem and rock type control on hillslope morphology and soil development in the Sandia Mountains, New Mexico
… between historical and natural variability in fluvial systems in the Greater Yellowstone Ecosystem. I used beaver-pond and other fluvial deposits as proxy records of beaver occupation to compare historical fluvial activity to that throughout the Holocene. The Holocene record prior to …
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Evolution and Architecture of an Incised Valley in the Upper Cretaceous Eagle Formation in South-Central Montana
… (SB), and transgressive surface of tidal-fluvial erosion (TSE). Within this sequence stratigraphic framework, 4 facies association, internal lower-order architectures (i.e. channel forms, lateral accretion sets, crevasse splays) and higher-order regional surfaces (i.e. sequence boundaries) …
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Evolution and Architecture of an Incised Valley in the Upper Cretaceous Eagle Formation in South-Central Montana
… (SB), and transgressive surface of tidal-fluvial erosion (TSE). Within this sequence stratigraphic framework, 4 facies association, internal lower-order architectures (i.e. channel forms, lateral accretion sets, crevasse splays) and higher-order regional surfaces (i.e. sequence boundaries) …
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Architecture and origin of fluvial cross-bedding based on flume experiments and geological examples field case studies: Rillo de Gallo, Spain and Northumberland, UK
… their internal sedimentary structures formed in fluvial environments within different depositional settings at Rillo de Gallo, (Spain) and Seaton Sluice, (Northumberland). In addition, flume experiments using well-sorted fine sand were used to investigate some of the factors controlling cross-bed …
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Architectural Models for Lower Pennsylvanian Strata in Dickenson/Wise County, Southwest Virginia: A Reservior Case Study
… the northwestern region of the basin are braided-fluvial deposits and were sourced by the cratonic Archean Superior Province to the north. This orthogonal relationship between the southeastern coal-bearing siliciclastics and the northwestern quartzarenites reflect a trunk-tributary drainage system …
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Sedimentology, Stratigraphic Evolution and Provenance of the Cambrian – Lower Ordovician Potsdam Group in the Ottawa Embayment and Quebec Basin
… paleoenvironments are recognized: (a) braided fluvial, (b) ephemeral fluvial, (c) aeolian, (d) coastal sabkha, (e) tide-dominated marine and (f) open-coast tidal flat. Fluvial strata were examined in particular detail and interpreted to consist of two end-member kinds. Braided fluvial deposits …
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Depositional history, environments of deposition, and hydrocarbon potential of the Newcastle Formation (Lower Cretaceous) of eastern North Dakota
… borders of the state. These were often capped by fluvial deposits.</p> <p>Again the sea transgressed, inundating the recently deposited Newcastle sediments. Deeper, quieter water conditions allowed for the deposition of the Mowry Shale on top of the Newcastle Formation.</p> <p>Estimates of the …
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Characterization of fluvial facies distributions and cyclicity using terrestrial lidar: Paleocene Nacimiento Formation, Kutz Canyon, New Mexico
The fluvial deposits of the early Paleocene Nacimiento Formation are comprised of variegrated mudstones with interbedded paleosols and channel sandstone bodies. This study documents these strata in a ~1 km2 outcrop area at Kutz Canyon, San Juan Basin, New Mexico, by employing fully georeferenced …
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Identifying source rocks and reservoir elements of South China Sea grabens using 3D seismic data, West Natuna Basin, Indonesia
… graben fill consists of basal alluvial fans and fluvial deposits during fault initiation, lacustrine flooding and deposition of lacustrine shales during fault linkage, and fluvial-lacustrine deltaic deposits in the through-going fault stage. During fault death shallow lacustrine shales, as well …
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