1) Geology terminology
Found on
https://www.crosswordclues.com/clue/subbasin
A subbasin is a structural geologic feature where a basin forms within a larger basin. It is sometimes spelled `sub-basin` depending on an author`s preference, but the predominant form is `subbasin`. Some subbasins are referred to as `sags`, although that term has a broader definition than a subbasin does. The term subbasin has common use i...
Found on
http://en.wikipedia.org/wiki/Subbasin
Major tributaries to and segments of the Columbia and Snake rivers.
Found on
http://www.encyclo.co.uk/local/21804
No exact match found.
