Precipitation in the area averages about 100–200 millimetres (4–8 in). Groundwater close to the surface and runoff sustain Kelso Wash.[2]Dunes frequently blocked its course, impounding temporary lakes that filled with sediments during the early Holocene.(Sweeney et al. 2020, p. 2328) The wash has cut as deep as 11 metres (36 ft) into the ground, and its course is flanked by river terraces.(Sweeney et al. 2020, p. 2318) The Union Pacific Railroad closely parallels the wash (Ramsey et al. 1999, p. 661).
^ abcWells, Stephen G.; Brown, William J.; Enzel, Yehouda; Anderson, Roger Y.; McFadden, Leslie D. (2003-01-01). "Late Quaternary geology and paleohydrology of pluvial Lake Mojave, southern California". Geological Society of America Special Papers. 368: 81. doi:10.1130/0-8137-2368-X.79. ISBN978-0-8137-2368-6. ISSN0072-1077.
Ramsey, Michael S.; Christensen, Philip R.; Lancaster, Nicholas; Howard, Douglas A. (1999-05-01). "Identification of sand sources and transport pathways at the Kelso Dunes, California, using thermal infrared remote sensing". Geological Society of America Bulletin. 111 (5): 646–662. doi:10.1130/0016-7606(1999)111<0646:IOSSAT>2.3.CO;2. ISSN0016-7606.