Collapsed till and glacial-lake deposits (of late Wisconsin and Holocene(?
(tg)Till, ice-contact deposits, glaciofluvial deposits, and glaciolacustrine deposits of late Wisconsin and Illinoian age taClayey to loamy till of Illinoian age tkGround-moraine deposits (Loamy till of Illinoian age) tjEnd-moraine deposits (Loamy till of Illinoian age) tfLoamy till of Illinoian and pre-Illinoian age tpClayey to loamy till of pre-Illinoian age thClayey to sandy till of pre-Illinoian age tbLoamy till of pre-Illinoian age (tr)Pre-Illinoian age discontinuous till, discontinuous glaciofluvial deposits, and concentrations of erratic boulders and cobbles faSurficial deposits, surficial materials, and bedrock masses that were deformed and (or) transported intact by glacial ice (lk)Beach sand and dune sand of Holocene age (in beaches, spits, and barriers) lcClay and silt (Glacial and postglacial lake deposits of Holocene and late Wisconsin age) lfSilt and sand (Glacial and postglacial lake deposits of Holocene and late Wisconsin age) lsSand and gravel (Glacial and postglacial