While examining and measuring uppermost Triassic and marine Jurassic sections during 1952 and 1953, Triassic facies relationships were established which necessitate revisions of the present nomenclature. The revisions include a reinterpretation of the Triassic-Jurassic boundary and the elimination of the name Nugget(?) sandstone in areas south and west of the Freezeout Hills in northern Carbon County, Wyoming. A new name is proposed for this sandstone unit. Stratigraphic studies on the upper part of the Triassic are continuing and the short summary that follows is presented as an interim report in hope that it may be of immediate usefulness to other...

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