interfinger

[in-ter-fing-ger]

in·ter·fin·ger

[in-ter-fing-ger]
verb (used without object) Geology.
(of sedimentary rocks) to change laterally from one type to another in a zone where the two types form interpenetrating wedges.

Origin:
1970–75; inter- + finger
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Interfinger is always a great word to know.
So is loam. Does it mean:
rich soil containing a relatively equal mixture of sand, silt and a smaller proportion of clay
ratio of the volume of the pores of a substance to the total volume of the mass
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