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21:52 Oct 29, 2006
This question was closed without grading. Reason: Other
English to Portuguese translations [PRO] Science - Geology / geology
English term or phrase:millet-seed sandstone
A sandstone consisting essentially of small spheroidal grains of quartz; typical of deposits accumulated under desert conditions.
grés encontrado em regiões áridas/ desérticas (do Arizona)
Explanation: Não encontrei nenhuma tradução em PT, apenas explicações do q se trata em inglês.
Sandstones form in a variety of ways. Arizona sandstones are extremely common rocks that are accumulated in either water originally, usually marine, or as windblown deposits in arid continental areas. Red , yellow, buff, and brown sandstones form as continental deposits in shallow marine environments where iron may be oxidized. Sandstone formed in lucustrine environments often exhibits cross bedding formed in deltas. Millet-seed sandstone forms in arid environments. The quartz sand grains are rounded by the wind. Large-scale dune bedding may indicate continental deposition. Sandstones that are not usually found in Arizona include a number of less common varieties. www.azcu.org/rocksmineralsaz/index.html
Claudio Mazotti Brazil Works in field Native speaker of: Portuguese PRO pts in category: 28