Ancient Lake Bonneville from 18,000 to 16,000 B.P. Wall Map

By: Buck Ehler Lake Bonneville has inspired, intrigued, and fascinated countless people since the first map depicting its maximum extent was published in G.K. Gilbert's Lake Bonneville monograph in 1890.  Were it not for the prominent Bonneville, Provo, and other relic shorelines across the eastern Great Basin, It would be hard to imagine a giant lake once covering what is now among the driest places on the continent.  Lake Bonneville existed from about 30,000 to 13,000 years before the present (B.P.).  Rising to its maximum extent, depicted on this map, it retreats to its current state as the Great Salt Lake and other relics closed basin lakes across its once great extent. The map attempts to transport the reader to the time of Lake Bonneville at its maximum extent from 18,000 to 16,000 Before Present (B.P).  This was a time during the last ice age when colder and wetter weather led to mountain glaciers and multiple large lakes across the Great Basin. New and modified names of geograp