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Show Figure 1 ( left). Regional map showing Lahontan basin and nearby pluvial lakes, selected shoreline elevations in meters, and areas of the largest middle Pleistocene ( medium shading) and late Pleistocene lakes ( light shading, Lahontan; dark shading, other pluvial lakes). Queried arrows on drainages show possible links between basins during highest lake stands; dashed lines show possible enlarged area of Lahontan basin. BR, Black Rock Desert; SC, Smoke Creek Desert; W, Winnemucca; BM, Battle Mountain; GS, Granite Springs Valley; R, Reno; CC, Carson City; WL, Walker Lake; RM, Rhodes Salt Marsh. Figure 2 ( below). Preliminary correlation of late Pliocene and Pleistocene lacustrine deposits and shorelines in western Nevada. Bold letters are identified tephra layers: L, Lava Creek; Rp, Rye Patch; B, Bishop; G, Glass Mountain; T, tuff of Taylor Canyon; H, Huckleberry Ridge; LS, La Salida tuff of Kettleman Hills. Arrows indicate range of age uncertainties. AF, Alloformation. N Northern Lake Walker Lake basin Lahontan ( So. Lake Lahontan) ^\> S30^/ SehooAF ~*\? 8S6ZP^ \ JI3SQ^ EetzaAF \^* J3{>/ o CO ^ J* 4W1^ L] H* P] >,£ ® in " S 35 • 2| co S^ • g- o 3 a X^ Mfig/ | B? N \^ S6 § /^ j G Jar. Lake Columbus- Rennie A Lake Clayton Lake Russell \) 49Q^\ B N I R + fossilsi \ x2" T8Sl/'' ( overflow to Owens River drainage) A \> 48Q^ Shoreline and altitude in meters G Jar. A Age control for lacustrine deposits: bold denotes tephra, N or R is polarity, Jar. is Jaramillo event Range of age uncertainty T R - J T + H Periodically connected via Redlich Summit and other thresholds? many | tephra i layers LS 22: 17- (° verflow X^ 277-/ Walker" River drainage) / K v j several i I possible! I tephra [ j matches | |