no XEW YCmK STJ^XE HX^CUM 



and there is a somewhat dewier boiied cfaamidi a short distance to 

 the nortli side. In eadi case this old rhamif^l bed lock is prafaablf 

 kss fredi and siAstantial, doe to f oimer weathering, than tine pres- 

 ent exposed surfaces. 



In each case g^bcial d^c^its readi a dndkness of more tha?n 200 

 feet within die narrow TaU^ or gorge, e^edally along die nordi 

 Taflej wall within the limits of the proposed dam. 



^edal geological conditiaas. The Actors in which there is 

 most Taiiation and wfaicfa are of most sigiiificance in a con^aratiTe 

 stodr are tlmse belon^ii^ to die glacial drift d^oahts. In order to 

 properlj estimate the influence of some of diese features it will 

 be necessary to briefly consider tlie ^rpes of material r^resented 

 at diSFerent places and the conditions under which diey were 

 formed. 



Types :: Tr.^-t:.i. 7 -~- ; : riildery till, mixed clay, 



sand- ^: T : riant type of uuifiial . 



ItforiEf v^ag^iont the r^on, 



and is . t i^.z : :- ^: - ^- at ^bces quite 



san^, ': : : lijost everps : t : t . t iterial becai^e 



of its i: T : :er. 



Lam -A 3 fe- n talily in the Beaver Idll near 



its moj: r Bridge, and in the : r 



drgwa} T : ^1 r ^^^tion appears in : 7 



slon;^ t!. 1: .: 1. : _ : :\ ':-;:-: .. -^.r'^rly quiet water ;_:-: 



as die "1-^: :: :. .i::- 7 : :^ t t : illy impel viocis. 



Gras?€l kiaiocks. A few sm^ -ainic ocr: :.■ 



indicath^ a. dun^ng ground f ' ; r ^ :. : -: : 2 ?Tn?^' -.i- 

 occupy the flat immediatehr wef: ; 1: ;: -:;: : 7 t 

 at a very late stage, ^kd into the coarse 01 ^ : : _ 



whose deha d^cmts occupy the sandy bee: t i^t 5^0 :-:: 



contour just north of Olive Bridge. 



Assorted gras^l and samd. This m a terial r jevdoped 



just nordi of OKve Bridge. It seems to h^ . -fella de- 



posit at the mouth of a glabra! stream that ^ : t nain 



vaUcy at diis p::-: 7 t : iDg water w£ : t : "e 



day and extrei::T -: t t 7 ^^-ther cmi t t -- 



the bottom of o ^ ::at was e: 7 : 



tqiper portion cf rr.r Zr -y- The da:: : 



of water whicr -1: r "t -r: -: : t : ^ t -.-. 



proposed " Ohr-- I' ^t 7 r i r- : : : ^^ t 



dam were in p^ ~ : : ^ - - - 



