This preliminary geologic map is an interim geologic map product prepared to document the progress of mapping the surficial geology of Whitley County, Indiana. Mapping was extended westward outside the Whitley County boundary to aid in unit correlation and interpretation. The shaded area will be mapped as part of 2013 STATEMAP project. The map area is contained within the region formerly occupied by the Huron-Erie Lobe and Erie Lobe ice streams in northeastern Indiana. The map area is underlain by unconsolidated deposits of Pleistocene and Holocene age that range from 150 ft to at least 300 ft thick. Landforms and near-surface sequences in the map area record complex interactions and relations between the Huron-Erie and Erie Lobes during late Wisconsin glaciation.