The shorelines of Lake Bonneville have been warped by isostatic processes, as was recognized by Gilbert and extensively studied since Gilbert's day. Earth's crust subsided beneath the weight of the water while the lake existed, but when the lake evaporated and the water load was considerably reduced, the crust beneath the lake basin rebounded. As a result, the elevation of the Bonneville shoreline is 74 meters (243 ft) higher in the Lakeside Mountains (1626 m, 5335 ft), west of Great Salt Lake near the center of the Lake Bonneville water load, than at Red Rock Pass (1552 m, 5092 ft), where the lake was very shallow. As an example of isostatic deformation of the shorelines, the elevation of the Bonneville shoreline near Salt Lake City is 1586 meters (5203 ft), but on Antelope Island in Great Salt Lake, the elevation of the same shoreline is 1599 meters (5246 ft).