254 TnE MAKQUETTE IIIOXBEARING DISTRICT. 



sight the appearance of an unconformity is very strong- indeed. (See fig. 10, 

 p. 243.) However, when the supposed conglomerate is followed along the 

 strike, its brecciated character is found gradually to disappear and it changes 

 into ordinary quartzite. The fragments, instead of being waterworn, are 

 distinctly angular. Moreover, while at first sight there appears to be a 

 wide variety of fragments in the breccia, all of these are obtainable from 

 the immediately adjacent beds. It appears that when the series was folded 

 the more plastic limestone yielded to the pressure, in both a major and 

 a minor way, by folding, while the brittle cherty quartzite was fractured 

 through and through, the movement of the fragments over one another, and 

 of the bed as a whole, being sufficient to truncate the minor waves of the 

 marble. In a large way tlie belt of dolomite and that of the quartzite and 

 breccia are conformable. 



In the west part of the SE. ^ sec. IS is exposed the contact between the 

 Mesnaixl quartzite and the Kona dolomite, which here has a general strike 

 approximately north and south and a dip to the east, but with minor cross 

 folds with east-west axes. At the top of the Mesnard is cherty quartzite, 

 which is followed by thin beds of novaculite and slate before the impure 

 limestone is reached. 



Kona Hills. — Tlic uiost extcusive exposures of the formation are on the 

 Kona Hills (Atlas Sheet XXXIV), which rise from 300 to 400 feet above 

 Goose Lake, and make up a great series of bluffs in sees. 11, 1"2, 13, and 

 14, T, 47 N., R. 26 W. It is from these extensive and typical exposures 

 that the formation is given its name. Facing the southeast arm of Goose 

 Lake are bold, almost vertical cliff's, 2()0 feet high. At the point where the 

 lake widens these cliffs slope rapidly to the north, following approximately, 

 with a somewhat regular incline, the dip of tlie formation. The lowest 

 exposure here found is a very impure dolomite. Above this follows a 

 succession of interlaminated, impure dolomites, red and black slates, cherts, 

 quartzose dolomites, cherty quartzites, at places brecciated, and occasional 

 beds of nearly pure quartzite, or even of conglomerate. These various 

 strata may have thicknesses from an inch or less to a number of feet. The 

 layers of quartzite, usually not more than a foot or two in thickness, and 

 oftentimes less, are generally interstratified with the d(Uomitic slates. In 



