Sandstone is a clastic sedimentary rock composed mainly of sand-sized silicate grains. Sandstones make up about 20 to 25 percent of all sedimentary rocks. This specimen is from Utah in the United States, and is generally referred to as Navajo Sandstone. Because of its thickness, massiveness, colour, and its decorative carving, the Navajo sandstone is the most conspicuous and best known unit in the Mesozoic sequence in the plateau country. It has been described in many scientific and popular publications and pictured in pamphlets and on postcards issued by tourist bureaus and transportation companies.
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50x50x50mm, 200g approx