Bulletin, Issues 32-34

20 feet 20 Inches 44 8 Meshes albite Amelia area Amelia County angular quartz biotite boulders cent channels chert chiefly Chowan-Dismal Swamp Coastal Plain crystals deposits dikes Dismal Swamp Dismal Swamp terrace drainage east elevation fairly well sorted Fall Belt feet wide feldspar Figure finer finest grades fluvial garnet Geol geologic gneiss Goochland grades contain half a mile heavy mineral grains Henry County hornblende ilmenite James River kaolinized loam loam gravel lower terraces mainly marine material medium sand mica microcline millimeter grades moderately well sorted muscovite North Carolina occurs pebble grades pegmatite Piedmont Plateau places Plain of Virginia Pleistocene Potomac River Princess Anne County Princess Anne terrace quartz grains Rappahannock remnants rock Sample sand and gravel schist showing mechanical composition slope Southampton County streams subangular quartz Sunderland Sunderland formation Sunderland terrace surface Surry scarp terrace and formation terrace formations tidal tion upland well-sorted Wicomico Wicomico formation Wicomico terrace