1) Scottish surname 2) Sedimentary rock
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https://www.crosswordclues.com/clue/gault
Gault is a clay formation of stiff blue clay deposited in a calm, fairly deep water marine environment during the Lower Cretaceous Period (Upper and Middle Albian). It is well exposed in the coastal cliffs at Copt Point in Folkestone, Kent, England, where it overlays the Lower Greensand formation, and is found in exposure on the south side of The ...
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http://en.wikipedia.org/wiki/Gault
heavy clay used for bricks
Found on
http://phrontistery.info/g.html
• (n.) A series of beds of clay and marl in the South of England, between the upper and lower greensand of the Cretaceous period.
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http://thinkexist.com/dictionary/meaning/gault/
Gault noun [ Confer Norw.
gald hard ground, Icelandic
gald hard snow.]
(Geol.) A series of beds of clay and marl in the South of England, between the upper and lower greensand of the Cretaceous period.
Found on
http://www.encyclo.co.uk/webster/G/14
The Gault is a series of beds of clay and marl in the South of England, between the upper and lower greensand of the Cretaceous period. They vary in colour from a light grey to a dark blue, and are developed chiefly in the neighbourhood of Folkestone (hence oftenc called Folkestone marl).
Found on
http://www.probertencyclopaedia.com/browse/HG.HTM
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