alb3846953
graywacke
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Title: graywacke
Caption: A sample of Graywacke. Greywacke (German grauwacke - signifying a grey rock) is a variety of sandstone generally characterized by its hardness, dark color, and poorly-sorted, angular grains of quartz and feldspar.
Category: SCIENCE • nature • Ecology & Environment • Geology & Fossils
Credit: Album / Science Source / Ted Kinsman
Releases: ? Model Release: No - ? Property Release: No
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Image size: 3610 × 2400 px | 24.8 MB
Print size: 30.6 × 20.3 cm | 1421.3 × 944.9 in (300 dpi)
Keywords: ECOLOGY & ENVIRONMENT • FELDSPAR • FELDSPATH • GEOLOGIA • GEOLOGY & FOSSILS • GEOLOGY • GRAYWACKE • HAND SAMPLE • MINERAL • NATURAL • NATURE • QUARTZ • ROCK SPECIMEN • ROCK • ROCKS • ROCKY • SAND STONE • SANDSTONE • SCI • SCIENCE AND TECHNOLOGY WISSENSCHAFT SCI • SCIENCE • SCIENCE-TECHNOLOGY • SCIENCE_AND_TECHNOLOGY WISSENSCHAFT SCI • SILHOUETTABLE • STONE • STONES • WHITE BACKGROUND
