[1] Lake Tight's origins date to nearly 2 million years before the modern era.

The glaciers of the Ice Age soon began to block the Teays, effectively damming the river and forming Lake Tight, near what is now Chillicothe, Ohio.

The reverse polarity of the clays points to an age greater than 700 ka, thus Pre-Illinoian.

A study in 2014 using Geographic Information System (GIS) Technologies, redefined the extent of Proglacial Lake Tight.

[3] Using National Elevation Datasets (NEDs) from the USGS, the author incorporated the 275-meter (902-foot) contour elevations into a GIS, spatially correlated the contours with Ohio Department of Natural Resources' GIS glacial, geologic, and topographic datasets, and developed a revised lake boundary that shows the areal extent of Proglacial Lake Tight was approximately 40% larger than has been previously estimated, covering some 25,740 km2 (9,940 sq mi).