Abstract

A short history of the term graywacke is given, illustrating the circular reasoning this term has produced. An urgent plea is made for either abandonment or restriction of the term. If the term is to be abandoned, the new name usamerite is suggested to describe a large group of rocks characterized by a size range from breccias to sandstones, a substantial quantity of fine matrix, poor sorting, variable rockfragments, and angular to subangular grains.

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