Bartsch-Winkler, Susan

25 items:

Replacement by calcite cement in sandstone from the Nanushuk Group, Calcite replacement of detrital grains, leaving a clay rim around original (calcareous?) grain. Central North Slope, Alaska. Replacement by calcite cement in sandstone from the Nanushuk Group, Calcite replacement of detrital grains, leaving a clay rim around original (calcareous?) grain. Sample 78ACh35, Krupa anticline; magnification, 6,3 x 10. Central North Slope, Alaska. Published as Figure 43A in U.S. Geological Survey. Bulletin 1614. 1985. Categories: Image; Tags: Bartsch-Winkler, S. Collection, Bulletin 1614, Photographers, photo print
Tidal bore of about 1.5m amplitude: marks low tide in Turnagain Arm, Cook Inlet Region, Alaska. Cook Inlet Region, Alaska. Tidal bore of about 1.5m amplitude: marks low tide in Turnagain Arm, Cook Inlet Region, Alaska. The bore is moving from right to left, followed by the flood tide. n.d. Cook Inlet Region, Alaska. Portion published as Figure 1, in U.S. Geological Survey, Circular 1022. 1988. Categories: Image; Tags: Bartsch-Winkler, S. Collection, Circular 1022, Floods, Photographers, Professional Papers, All tags... photo print, Fewer tags
Complex wavefront of the Turnagain Arm bore. The bore is moving from right to left and is followed by flood tide. Cook Inlet Region, Alaska. Complex wavefront of the Turnagain Arm bore. The bore is moving from right to left and is followed by flood tide. Photograph taken from airplane at approximately 100 ft. altitude, n.d. Cook Inlet Region, Alaska. Portion published as Figure 6 in U.S. Geological Survey, Circular 1022. 1988. Categories: Image; Tags: Bartsch-Winkler, S. Collection, Circular 1022, Floods, Photographers, Professional Papers, All tags... photo print, Fewer tags
Quartz overgrowths on sandstone grains after clay formation, Nanushuk Group. Quartzose grains have overgrowths at points of low pressure (pore space) adjeacent to areas that were probably under high pressure (grain contacts). Central North Slope, Alaska. Quartz overgrowths on sandstone grains after clay formation, Nanushuk Group. Quartzose grains have overgrowths at points of low pressure (pore space) adjeacent to areas that were probably under high pressure (grain contacts). Overgrowths probably develop where clay coatings are absent. A polycrystalline quartz grain (upper left) has a pod of kaolinite growing on its surface. Sample 78ACh23, Kurupa anticline; magnification, 6.3 x 10, photomicrograph. Central North Slope, Alaska. Published as Figure 47A in U.S. Geological Survey. Bulletin 1614. 1985. Categories: Image; Tags: Bartsch-Winkler, S. Collection, Bulletin 1614, Formations, Photographers, Photomicrographs, All tags... photo print, Fewer tags
Quartzone sandstone from the Nanushuk Group, having abundant quartz-overgrowth development. Central North Slope, Alaska. Quartzone sandstone from the Nanushuk Group, having abundant quartz-overgrowth development. Sample 78ACh25, Marmot syncline. Quartz cement migrated from the monocrystalline quartz grain into the adjacent polycrystalline quartz grain, which has been corroded. Polarized light. Magnification, 6.3 x 10, photomicrographs. Central North Slope, Alaska. Published as Figure 48D in U.S. Geological Survey. Bulletin 1614. 1985. Categories: Image; Tags: Bartsch-Winkler, S. Collection, Bulletin 1614, Photographers, Photomicrographs, photo print

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