Quartzone sandstone from the Nanushuk Group, having abundant quartz-overgrowth development. Central North Slope, Alaska.
Summary
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.
Summary
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.
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