Peat discovered below drift near Titusville, formerly called "inner Illinoian," has carbon-14 age of 31,400+\-2,100 yrs. Overlying drift, herein named Titusville Till, is not Illinoian but is late early Wisconsinan or late Altonian of Lake Michigan lobe classification. Titusville Till is surface material between eastern boundary of that till and boundary of Kent Till. It is overlain by Kent Till west of Kent margin. Commonly underlain by sand or gravel ranging from fraction of an inch to 15 ft in thickness, which in turn lies upon bedrock or upon till of an as yet unknown age.

Source: GNU records (USGS DDS-6; Reston GNULEX).

Unit is oldest till on surface of northeastern OH. Usually subsurface, however, and the thickest of the subsurface tills, averaging 20 ft. Described as very sandy, coarse, and pebbly, very compact, dark gray. Weathers to a distinctive olive-brown with manganese stains. Underlies Kent Till; overlies Mapledale Till or bedrock. Age is early Wisconsinan (Altonian).

Source: GNU records (USGS DDS-6; Reston GNULEX).

Age assignments of Wisconsinan units in northern OH and northwestern PA have relied upon sections exposed at Titusville, PA, and at Garfield Heights, OH. A section recently exposed at Mt. Giliad, OH, has required a revision of the age of the Titusville, Garfield Heights, and Millbrook Tills. Titusville was originally interpreted as younger than 40 ka, but older than the late Wisconsinan Kent Till. The late early or early middle Wisconsinan Titusville was considered correlative with the Magadore, Millbrook, and Jelloway Tills. Although the peat at the Titusville section has a 14-C age of about 40,000 yrs B.P., its stratigraphic relation to the Titusville is uncertain as it is separated from it by about 180 m of covered section. Therefore, the age of the Titusville Till at its type section is unknown.

Source: GNU records (USGS DDS-6; Reston GNULEX).