Location of Berger Bluff and some other important Pleistocene archeological and paleontological sites. Also shown are the modern Gulf shoreline and the position of the shoreline at various times in the Pleistocene (when sea level was lowered, as immense quantities of water were frozen in landlocked ice sheets). The submerged paleochannels of Texas rivers, now drowned by rising sea level, are also shown. From Brown (2006:Fig. 2.8)