Show UIG BIG LOST LAKE LAIM IN NEVADA during comparatively recent geo agic time a great lake flooded a umber of the valleys la in northwest rn nevada this lake has now al jiosa n oat completely disappeared but geologists have named it in its en lake lahontan in lionor honor of jaron la hanitan Hon tan itan one of the early explorers of the headwaters of the lissis at the tim time e of its great tat st expansion according to the unit d states geological survey depart lent of the interior this ancient ake abe covered square miles the deepest part of lake lahontan chich was feet deep djs was the ite bite of the present pyramid lake jue of its remnants so that its sur ice stood about feet above the surface of pyramid lake the an ent lake had no outlet except the no that led straight up its waters sing dissipated entirely by evaporation A large area a few miles north of winnemucca nev is covered with sand dunes ithac were formed since lake lahontan Lalion I tan disappeared these dunes are fully 75 feet thick and their steeper slopes are on the east side indicating that the whole vast 1 lc beld ld of sand is slowly traveling east ard the march of ahls sand is ir resistible esi esis tible and its progress has nece a number of changes in the oads in the southern part of little gumboldt lum boldt valley during aaring reent bears ears in some places in this region he telegraph poles have been buried 0 deep that they awe have had to be spliced iu in order to keep the wires above the crests of tile the sand dunes thes and ind Is of a yellow olor and forms beautifully curved adges and waves that are covered ath vl alth an ail artistic artisti c fretwork of wind ripples |