Clay Mineral Studies on Terracesuf Zayandehroud River in Isfahan

In 1 his experiment for SI udyi ng and co mparing of clay m i nera Il. in t he sol is uf river terraces, fou r profi les se lec teu and ),:unpICtl a, reprc.chr('39')>enlcd profiles for mineralogical analysis. Three profile..; were on th ree terraces of Zayanuehrood river in Pole - ShllhrCSlan Ihal caen of them has different ages, and the forth is loca ted un the o ld rive r alluvial pla in and is o lde r th an three terraces. So il samples were prepared according to the proposed method Ichr('39')ly Killric and Hope. X - ray technique was used 10 determine Ihe minerals present in the rine and coarse clay fr the pre),cm:e of Ollart:r, Kll nlin i tc, IlI i1t~, r hl ori rc ;end :1 l ill ie. POlygorskitc in all soils. In the soil of hi gher terrace there is Smel.:ti lc and in the old plainchr('39')s so ils the Smectit e and Pnlygorskitc arc dominant. This co nfirms the idea that Smeclite procc.~s.