منابع مشابه
Mars Sediment Analog? Dark Biomineralized Mn-oxide/hydroxide Cemented Sandstone of Low-t Spring Origin
SANDSTONE OF LOW-T SPRING ORIGIN. J. L. Berkley, Department of Geosciences, SUNY Fredonia, Fredonia, NY 14063 and Kaitlyn Dykstra, Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, PA 15213. Introduction: Detailed petrological analysis of a dark black to dark brown conglomeratic sandstone in southwestern New York State shows that its cementing agent is composed mainly o...
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BACKGROUND Congenital dermal sinuses represent cutaneous depressions or tracts that are lined by stratified squamous epithelium. They communicate between the surface of the skin and deeper structures and may occur anywhere along the craniospinal axis. These sinuses are thought to result from abnormal separation of the cutaneous and neural ectoderm between the third and fifth week of intrauterin...
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Research has been conducted into the diagenesis of the Luxembourg Sandstone. Literature studies were followed by a visit to the outcrop, after which thin sections were studied. The Luxembourg Sandstone Formation has been deposited in the Hettangian and Sinemurian, both lower Jurassic ages. A sea strait connecting the Northern German Basin and the Paris Basin was located in present day Luxembour...
متن کاملAnisotropy of sandstone permeability
Small-scale probe permeability measurements on differently oriented faces of highly compacted and quartz-cemented Viking Formation sandstones yield detailed permeability distributions that appear to be diagnostic of the grainand lamina-scale fabric of the samples. Permeability anisotropy of a single structureless'-appearing sample is low, reflected by a kV / kH-ratio of 0.7; corresponding k-di...
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Single-wall fullerene nanotubes were converted from nearly endless, highly tangled ropes into short, open-ended pipes that behave as individual macromolecules. Raw nanotube material was purified in large batches, and the ropes were cut into 100- to 300-nanometer lengths. The resulting pieces formed a stable colloidal suspension in water with the help of surfactants. These suspensions permit a v...
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ژورنال
عنوان ژورنال: Geological Magazine
سال: 1937
ISSN: 0016-7568,1469-5081
DOI: 10.1017/s0016756800089020