290 11. S. Sunivicrs: 



oocmrence, distribulimi, \'n\-\\\ of [u'lililc-s, vtc, tliiui on the 

 presence "I sti-iiited boulders. 



Very few sections through the connlonierato are met with, the 

 bulk of tlu\ niiderial lyiii^' in it valley between the present river 

 bed and tlui hills to the east, and the thickness is only known 

 from llm depth of lioros and shafts put down alonf; the line 

 orijifinally proposed fnr tho weir siite. Unfortunately the shafts 

 have been. HUed in, so that no information ca.n be obtained in 

 them. 



The ^oneral distribution of the coufjlomerate is shown in the 

 acoomiJanyintj: sketch map of the area. The upper jiortion lies 

 near tlio base of a. stcicp scarp to the south of Mt. Samaria, and 

 it becomes almost impossiblo to trace it on account of the fallen 

 material from the scarp in places completely covering; the sur- 

 face. \l is in this part, however, that- the best section occurs, a 

 small cross valley exposintr a thickn,ess of -iOft. of cons^lomerate. 

 The pebbles are mostly small, beinp; between 2 and 4 inches in 

 diameter, larirer ones beiuLi,' rare. Most of the pelvbles show 

 fa.cettin^', and are all smooth and polished, but no striatinns 

 wea^o crbsei'ved. The pelibles consist almost entirely of hard 

 quartzite, and are set in a fine-fjrained mata*ix. In general the 

 whole mass is tirndy cemented together, and large blocks of con- 

 gloiiierato are found along the bed of the cross valley. At this 

 point the uppei" part of the conglomerate is about 100ft. alvove 

 the level of Wild Ho.u,- ("reek. 



Along the Broken Rivev, above its junction with Back Creek, 

 abundant boulders and pelibles occur in the bi-d of the river, 

 and although now waterworn and showing no signs of facetting, 

 they quite posisibly represent resorted glacial material, especially 

 as many of the boidders cmisist of a dyke rock comjiosed t^f a 

 soda hnrnblende, and an alkali felspar, which must have travelled 

 a cinisiderable distance, a.s no outcrop of such n rock occurs 

 ahmg the stream for nuvny nules above Dawes' Flats, where boul- 

 ders (d' it are extremely common. 



Along the sides of the valley and well above present Hood 

 level, are found pidiblcs (d' quartzite resting on the gi^anites, aaul 

 the form of tliese pebbles suggessts a glacial origin. So far I 

 have liad no o|iport unity of examining the oountiy higher up 

 the valKy, where possibly more cnnglomerate would be found. 



