INTERESTING LOCALITIES OF TUE KONA DOLOMITE. 255 



one place ripjjle luavks were seen in the beds above and l)elow a layer of 

 conglomerate. The close intermingling of mechanical and nonmechanical 

 sediments suggests that at the time of the deposition of the lower half of 

 these beds the water was not very deep, and perhaps a shore-line was not 

 distant. The colors of the rocks vary from the dark gray of the slates, 

 through various shades of buff and brown, to nearly white in the case of 

 one or two of the dolomites or quartzites. Following aliove these beds 

 are others comprising all of the foregoing kinds, and also heavy beds of 

 nearly pure, coarsely granular dolomite, some of which are 20 feet 

 thick. The total thickness of the beds thus far exposed measures about 225 

 feet. The argillaceous beds are extensively affected 1)}^ a slaty cleavage, 

 which frequently stops abruptly at the more massive dolomite or quartzite 

 beds (fig. 9, p. 243). 



After an interval of no exposure, the next place north on Goose Lake 

 is occupied by coarsely crystalline, nearly pure, pink dolomite, with occa- 

 sional layers of more finely crystalline material and a few layers of chert. 

 After another interval of no exposure are very large outcrops of similar 

 dolomite, some layers of which, however, are very quartzose, and a few lay- 

 ers of which are shaly. The northernmost exposure is a coarsely crystalline 

 dolomite, containing many nodules of coarsely crvstalline quartz. Of the 

 large exposures southeast of Goose Lake, probably not more than one-third 

 of the thickness is composed of reasonably pure dolomite, the remaining 

 two-thirds being largely mechanical sediments. Farther to the east the 

 proportion of mechanieal material is not so great. 



Of the numerous large exposures east of Goose Lake, only a few 

 are platted on the atlas sheet, and these are mainlv along the outer borders 

 of the area This area has, however, been sufticiently traversed to show 

 that there are everj^where great bluffs of the dolomite. 



As explained in the general folding of the area, east-west and north- 

 south forces were about equally strong, although the folds with north-south 

 axes are, upon the whole, of larger dimensions and less dips than those 

 with east-west axes. It follows that strikes and dips can be found in 

 almost any direction, and the true structure is perceived by general study 

 rather than by taking strikes and dips. As a result of the folding, the 



