■790 [Assembly 



brokeo limestone, about equal in quantity to the rock, thrown off 

 by theporphyric eruption, are scattered upon the top of an hyper- 

 stene hill, two miles distant, and two hundred feet high, and 

 in a direct line with this porphyry vein. Large and produc- 

 tive quarries of limestone, from which valuable exportations of 

 building materials are annually made, are wrought in Essex 

 and WillsI)oro\ Various fossils occur in this rock, and also in the 

 slate or shale which lies contiguous. Many of these remains are 

 of gre^t size, and in unusual preservation. A few years since, a 

 single fossil of a reptile was exhumed by Mr. Clark, measuring 

 two feet in length, and so perfect in its preservation, that the 

 form of the minute scales could be distinguished. The northern 

 extremity of Willsboro' point, is occupied by a slate ledge, identi- 

 cal iu appearance, and its fossiliferous character, with the same 

 formation, upon the Islands and the Vermont shore of the lake. 

 At Mount Trembleau, as in Willsboro', Westportand Moriah, the 

 fiyperstene rock plunges into the lake in a bold, ragged, and per- 

 pendicular wall. A very peculiar and large deposit of stalagmite 

 lies upon the north bank of the Boquet, near, but not subjacent 

 apparently, to a mass of limestone. Several veins of kaolin, de- 

 velope at Mt. Trembleau, upon the lake shore, beneath the hyper- 

 sten@. Similar masses occur in other sections of the county. A 

 specimen from Putnam's iv)nd, in Schroou, was subjected to ana- 

 lysis, many years since, by Professor Eaton* and pronounced by 

 him eminently pure and exempt Irom injurious combinations. 

 I/imestonej and very clear quartz rock, sup]>osed to be adapted 

 to the glass manufacture, and beds of clay, of gi'eat purity, occur 

 in St. Armand.f 



A long and attractive list of rare and boautitul minerals might 

 be exhibited, which are incorporated with the rocks of Essex 

 county, or imbedded in its earth. Particular localities are pe- 

 culiarly rich in these deposits. The crest of a hill upon the 

 premises of Col. Calkins, near Lake George, aifords a choice field 

 for the researches of the scientific explorer. The avalanches, at 

 Long pond, in Keene, presents a site still more lavishly supplied 



•Mr. Tread'.rn.y. 

 t Kliaa Goodapccd, Esq. 



