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Articles 421 - 424 of 424
Full-Text Articles in Physical Sciences and Mathematics
The Depositional Environment And Diagenetic Effects On Sand Bodies Within The Unconventional Resource Play Of The Spearfish Formation (Triassic) In North Central North Dakota, Matthew J. Sebade
Theses and Dissertations
The Triassic Spearfish Formation in North Dakota is comprised of three members, the Belfield, Pine, and Saude Members, in ascending order. This study focuses on the Saude Member in north-central North Dakota on the eastern margin of the Williston basin. Both the upper and lower contacts of the Spearfish in the study area are unconformable. In this region, the lateral distribution of red sandstone and argillaceous siltstone lithofacies were mapped using well log data. Four sandstone bodies were identified then mapped across the region using gamma ray logs. Sandstone bodies in descending order are the A sand, B sand, water …
Temporal And Spatial Evolution Of Wave-Induced Ripple Geometry: Regular Versus Irregular Ripples, Timothy Nelson, George Voulgaris
Temporal And Spatial Evolution Of Wave-Induced Ripple Geometry: Regular Versus Irregular Ripples, Timothy Nelson, George Voulgaris
George Voulgaris
Concurrent observations of inner shelf near bed hydrodynamics and acoustic imagery of the seabed are used to relate wave-induced ripple geometry (wavelength and orientation) to near bed directional wave velocities. The observations were collected on the continental shelf of the South Atlantic Bight at water depths of 9.5 and 30 m off the coasts of South Carolina (median size 177 mm) and Georgia (388 mm), respectively. 2-D spectral analysis techniques are performed on the imagery to automate detection of ripple wavelength, orientation, and irregularity. Our analysis shows that ripple irregularity is a time-dependent process dependent on magnitude, direction, and duration …
Rheology Of Magnesite, Caleb Holyoke, Andreas Kronenberg, Julie Newman, Christopher Ulrich
Rheology Of Magnesite, Caleb Holyoke, Andreas Kronenberg, Julie Newman, Christopher Ulrich
Caleb Holyoke
No abstract provided.
Microstructural Evolution During Strain Localization In Dolomite Aggregates, Caleb Holyoke, Julie Newman, Andreas Kronenberg
Microstructural Evolution During Strain Localization In Dolomite Aggregates, Caleb Holyoke, Julie Newman, Andreas Kronenberg
Caleb Holyoke
No abstract provided.