336 PEOF. THOMPSON'S STATEMENTS. 



ing from fifty to nine hundred feet above the Lake ; and through this whole extent the 

 rock consists of a reddish or reddish-gray sandstone. At the Sugar Loaf, Glebe Hill, and 

 Mutton Hill in Charlotte,* and through Shelburne, it appears to be a nearly pure silicious 

 red sandstone, exhibiting very distinct strata. From Lonerock Pointf northward, the 

 rock is considerably calcareous, and the marks of strata are nearly obliterated. Its color 

 is variegated, and in many places variegated with reddish-gray and yellowish-white. At 

 Lonerock Point, and at several places in Colchester, this rock is seen lying upon the black 

 slate [Hudson River] ; and at the former place fragments of it are found imbedded in the 

 slate. At Bluff Point the lowest strata visible have very much the appearance of the 

 strata further north, above mentioned, but the stratification is very distinct. Fig. 244 



represents a section running through it. 

 From the west end, near the water, is red 

 dolomite, b exhibits shrinkage cracks, and 

 c fucoids. The dip is 25 E. near the water 

 at a ; but is 10 E. at c. 



"At the Sugar Loaf in Charlotte, the lower 



Section at Bluff Point strata of the red sandstone formation for ten 



or twelve feet above the black slate are in- 



terstratified with green shale. The dip of the red sandstone proper in Burlington varies 

 from about 8-12 E., with the exception above named at Bluff Point. The places where 

 it may be seen to best advantage are Willard's Ledge [Fig. 237], half a mile south of the 

 village, and at the foot of Winooski Falls [in Fig. 236.] The strata at these places vary 

 in thickness from an inch to two feet, and the different strata vary considerably in the 

 fineness of the materials and the shades of color. At Willard's Ledge there is one stra- 

 tum, about four inches thick, of almost pure white quartz, which may be traced for a long 

 distance. Other strata are almost black, while others are slaty, with a green surface ; 

 others are contorted, variegated and jointed. The position of several of these are shown 

 in Fig. 238. b is in places very compact and beautiful, having some resemblance to agate. 

 Between the strata of sandstone at this locality are interspersed at several places ex- 

 tremely thin layers of quartz, some colorless and nearly transparent, others more opaque, 

 bearing dendrites upon their surfaces. The upper strata at Willard's Quarry are nearly 

 white and quite calcareous ; and they become more and more calcareous till the silicious 

 matter is all gone, and they are nearly pure unstratified limestone [Eolian.] 



" At Winooski Falls the red sandstone passes equally sudden into gray sandstone with 

 more carbonate of lime. Beautiful ripple marks occur in many of the strata of red 

 sandstone both at Winooski Falls and Willard's Ledge. What appear to be impressions 

 of rain drops are frequently met with, and at Winooski Falls, Redrock Point, and Bluff 

 Point, fucoids are abundant. 



" Half a mile east of the gray calcareous sandstone at Winooski Falls is a sharp uplift, 

 marked 8 on Fig 236, and exhibited upon a larger scale in Fig. 239. It is almost wholly 

 brown quartz. It is succeeded on the east by a calcareous sandrock, in which the traces 



*There is also a small patch of gray sandstone belonging to this formation upon a small hill west of the general range, half a mile 

 south of Charlotte Village. C. H. H. 



fShatp Shins. 



