KAOLINITE FROM THE TERMINAL MORAINE OF STATEN ISLAND Peur. F. Kenn, Colwmb'ia Uniaers'ity. Isolated patches of white clay occurring in the terminal moraine of Long Island, Staten fsland, and southern New Jersey have been

Isolated patches of white clay occurring in the terminal moraine of Long Island, Staten fsland, and southern New Jersey have been mentioned in a number of geologic descriptions. Such an occurrence was recently encountered during excavation for a building site and samples were submitted to the mineralogical laboratory of Columbia University for identification by Messrs. Schoonmaker and Kirkman. Examination proved the clay to be composed essentially of kaolinite and muscovite. In view of the unusual occurrence, however, the clay app3ars to merit descript;on. Recent studi:s1 of clay minerals suggest that a review of a number of the early described occurrences of "kaolin" would be worth while. This paper is submitted as a part of such a program. The clay outcrops along the west bank of a small creek about one-half mile southwest of Princess Bay Station on the Staten Island Railroad. The locality lies 100 yards north of Hylan Boulevard, and may be reached by following the west bank of the creek from the beginning of the west approach of the creek bridge on the boulevard. The creek cuts through the terminal moraine at this point and flows southeast into the head of Princess Bay, on the south side of Staten Island. (Staten Island' sheet, IJ.S.G.S. lopographi,c n+ap.) The excavation in which the clay was encountered penetrates the glacial till of the terminal moraine to a depth of thirty feet. The material overlying the clay is typical till of the type peculiar to the Staten Island section of the terminal moraine. It consists of loosely consolidated clay studded with boulders of variable size and is made up of a heterogeneous assortment of materials' The white clay occurs at the bottom of the excavation (Fig. 1). The clay varies from a fraction of an inch to a foot in thickness