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millet-seed sandstone

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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.
CatarinaMassano
Portugal
Local time: 04:33
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Summary of answers provided
3grés encontrado em regiões áridas/ desérticas (do Arizona)
Claudio Mazotti


  

Answers


30 mins   confidence: Answerer confidence 3/5Answerer confidence 3/5
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
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