Abstract
Note: This paper is dedicated to Aaron and Elizabeth Waters on the occasion of Dr. Waters' retirement. A drill hole, a few hundred feet within the supposed feather edge of the Triassic rocks of the Newark-Gettysburg Basin, near Thomasville, Pennsylvania, penetrated about 800 ft of Triassic strata. This anomalous section consists of a thick basal limestone conglomerate, a calcareous facies, including limestone and black shale, and an upper sequence of fining-upward cycles of sandstone and red mudstone. This record shows that the southeast margin of the Triassic basin is not a simple overlap as heretofore thought. The stratigraphic and structural problems disclosed by the borehole record here described cannot be fully resolved without further drilling or geophysical surveys.
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