Now showing items 1-10 of 318
STRUCTURAL GEOLOGY, STRATIGRAPHY AND PETROLOGY OF THE ELKHORN RIDGE ARGILLITE, IN THE SUMPTER AREA, NORTHEASTERN OREGON
The Elkhorn Ridge Argillite exposed in the Bourne-Sumpter area of eastern Oregon is a broken formation of metamorphosed (greenschist facies) hemipelagic sediments, reefal carbonates, rare clastics, mafic volcanics and ...
Sedimentology and structural geology of the Endicott Mountains allochthon, central Brooks Range, Alaska
The Endicott Mountains allochthon is an east-west striking stack of north-northwest vergent thrust sheets which were emplaced during late Mesozoic and Cenozoic (Brookian) orogenesis. Thrust sheets in the allochthon are ...
Separating tectonic, eustatic, and episodic depositional processes in the stratigraphic record of the basins of southeastern and northwestern Australia (Cretaceous Period)
Four dynamic processes interact to create the stratigraphic record in a basin: climate, sediment supply, eustasy, and subsidence. To identify the contribution of each of these processes, techniques that can uniquely separate ...
STRUCTURE OF THE NORTHERN SIERRA NEVADA, CALIFORNIA
Structural features on megascopic, mesoscopic, and microscopic scales have been examined in a study area located in the central portion of the northern Sierra Nevada (west of Lake Tahoe). Structures observed within the ...
Imaging complex structures with semi-recursive Kirchoff migration
Attempting to image the subsurface in areas of complex geology and rapid lateral velocity variation is a challenging problem. In particular, using prestack Kirchhoff migration in conjunction with first arrival travel times ...