364 E. HUNTINGTOlf GLACIAL PERIOD IN NON-GLACIATED REGIONS 



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I "-S 'j;'. 



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 I.Vf.V, 



^^^^^ 



05) 130 rt'Ct— Gruvut. 



— — — Uui-oufominy. 

 (44) 4 feet — Cross-t>C(l(]i»] saiid. 



(43) IV, tii'I— Pink clny. 



142) 4 ft*t— Bnnd«J ereea. wblte, yellnw. niiil brown tiny. 



(41) 4 feol— Brown clay, sllglit iiiicniifiji'inlly 

 (40J G fwt— PlDb cluy. 



(311) S feel— Ureen I'Iny. ■ 

 (.18) 3 fwt— Pink olny. 



(37) Vi fool— GypBuui. 



(30) 6 feel— Green dny, 

 (35) 2 feel— Purple clny: 

 (.■M) reel— Pink clny, 



(33) — —Bund of Krll and (Inc wmrt. 



(32) ]0 feet— Plot clny 



(31) Vt fool— Flue gniY.?! 



(30) 6 feet— Green oliiy wllU wliKe biinJn 



J20) 10 feet— riiib clny 



(291 rt*l— Diriy green cluy. 



'J7) 35 feet— Pliik clay, pnrtly Urown. 



2 feet — Plue yellow eantL 

 6 feet— Green tiny. 



r2ii 20 feel— Pink clny wHli Hue U;indR of Hnnd.- 



(23) 4 feet— Ftnc browD enud nnd piiiV 



(22) B feet— Green clay 



(211 2 feet — Floe tirowu sand. 



(20) 20 fi-et- Pliik clny. 



(IW) 2 feet- Very flue Btfnd. 

 (18) 3 feel— Pink clny uni] ennd. 

 (17) 4 feet— Green clny. 



(10) 10 feet- Plnh clny. 

 (13) 1 fool— Fine snnd. 



(11) 12 feet^Pluk clnr- 



(13) — —Band of fine aand. 



(12) 5 fe«t— Green clny. 



(Ill 1 fool— Fine yellow sand, 

 (10) 2 ffTOt— Purple clay, 



(!') 4 fiiet- Pink clny. 



(8) 2 fc«t — SoDdy plnh clay. 



i feet— Plnli clny. 



10 Xeet— Green clny wtUi r yellow Ixind 

 — —Bond ot grlL. 



IS re«t— Sandy pink ellt. 



1 foot — Grfly*J. 



2 fc«C — Brown aand. 



Figure 3. — Section of Clay Deposits in 

 old Lake Bed of Seyistan. 



Locality near Kuh-i-chaku, northwest of 

 the lake. Scale : 1 inch = 60 feet. 



(swamp of Seyistan), is a broad and 

 exceedingly shallow expanse of fresh 

 water surrounded by a vast reedy 

 swamp. Occasionally, during years 

 of unusually high floods, this lake dis- 

 charges to another lying farther south, 

 the intensely salt God-i-Zirrah. Both 

 lakes are surrounded by the bed of an 

 older, larger lake. The bed is a plain, 

 splendidly fertile wherever water is 

 available for irrigation. It is sur- 

 rounded by a bluff cut by the expanded 

 lake of ancient times. At the top of 

 the bluff a huge desert of wind-blown 

 sand and parched gravel stretches mile 

 after mile toward the distant moun- 

 tains. 



During the latter part of the Qua- 

 ternary era volcanoes broke out in 

 various places within the limits of the 

 old lake. In the course of their erup- 

 tions earth movements took place, and 

 large portions of the lake bottom were 

 uplifted and covered in part with caps 

 of lava. Subsequent erosion by the 

 lake has cut into the uplifted strata, 

 with the result that in some places 

 there are bluffs' from 400' to 600 feet 

 high. The strata thus exposed reveal 

 the history of the Seyistan basin dur- 

 ing and preceding the time Icnown 

 elsewhere as the Glacial period. The 

 record is simple and apparently easy 

 to interpret. There is no greater em- 

 phasis on one phase than on another, 

 and nothing seems to be lost. 



PLEI8T00ENB (AND PLIOCENE) 

 DEPOaiTS OF 'SEYISTAN 



1. Subaerial red beds. — The na- 

 ture of the deposits uplifted at the 



