Along the east portion of this wedge and instead of being an acid in trusive is a light colored glassy arkosic mud, massive, unbedded, and apparently about 20 feet thick. It contains in the lower quarter a seam one to five inches thick in which Bastin discovered Platyschisma helicites in abundance and large size, - over an inch thick. The seam also contains some large lamellibranchs with Cyrtodonta-like dent- ition and resembling Megalonus in outline altho the precise outline is only very obscurely preserved. These fossils are C:24:7(C). This band of rock is tuffaceous, - inclosing small angular fragments of pink rhyolite, and rounded pebbles of half an inch thickness (1/4 to 1 1/4 inches) of gray rock, cf. limestone (?). Below this, the rock resembles the fine grained freestone bands of Birch Point in lithol- ogy. A specimen is 1107. Above it the rock is mottled and includes bits of pink rhyolite, equals 1108. Specimen 1109 is the diabase dike on the northwest side of the cove.