
1) Earth 2) Ground
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https://www.crosswordclues.com/clue/saprolite

Saprolite is a chemically weathered rock. Saprolites form in the lower zones of soil profiles and represent deep weathering of the bedrock surface. In most outcrops its color comes from ferric compounds. Deeply weathered profiles are widespread on the continental landmasses between latitudes 35°N and 35°S. Conditions for the formation of deeply ...
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http://en.wikipedia.org/wiki/Saprolite

(from the article `aluminum processing`) ...apatite and alunite in Europe, kaolinite in the southeastern United States. Other nonbauxite sources of alumina are also available: alumina clays, ...
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http://www.britannica.com/eb/a-z/s/30

A rock chemically disintegrated in its original place as a result of deep weathering of the bedrock surface.
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http://www.scientificpsychic.com/etc/geology-glossary.html

[
n] - a deposit of clay and disintegrating rock that is found in its original place
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http://www.webdictionary.co.uk/definition.php?query=saprolite

saprolite 1. Thoroughly decomposed, earthy rock, lying in its original place. 2. Soft, clay-rich, thoroughly decomposed rock formed in situ by chemical weathering of igneous and metamorphic rocks.
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http://www.wordinfo.info/words/index/info/view_unit/1893/2

A soft, clay-rich, thoroughly decomposed rock formed in place by chemical weathering of igneous or metamorphic rock. Forms in humid, tropical, or subtropical climates.
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https://www.encyclo.co.uk/local/20094
noun a deposit of clay and disintegrating rock that is found in its original place
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.