446 REPORT ON NATIONAL MUSEUM, 1886, 



California. — Arouud the Bay of San Francisco there occur sandstones 

 of a considerable variety of colors which are beginning to come into use 

 to some extent. The i^revailing colors here are brownish and gray. 

 On Angel Island, in Marin County, there occurs a fine sandstone of a 

 greenish-gray color, which has been used in the Bank of California 

 building, and others of a lighter shade are found in various i)arts of 

 Alameda County. A few miles south of San Jose, Santa Clara County, 

 there are also inexhaustible sui^plies of liglit gray and buft" stone, but 

 which are at present worked only in a small way, Near Cordelia, So- 

 lano County, there occurs a coarse, dark-gray volcanic tuif, that can, 

 perhaps, be utilized for rough construction should occasion demand. 



Colorado. — This State contains a variety of sandstones, of good qual- 

 ity, but which, owing to lack of transportation facilities and the thinly 

 settled condition of the country, are as yet in little demand. Near Fort 

 Collins, in Larimer County, a fine light-gray stone occurs which is ex- 

 cellent for flagging and foundations, but contains too much pyrite for 

 fine building r)urposes. At Coal Creek, in Fremont County, is also a 

 fine grayish or bulf stone closely resembling that of Berea, Ohio. As 

 seen by the writer in the stone-yards of Denver, this is a most excellent 

 material, being free from flaws, of good color, and cutting to a sliarj) 

 edge. It is stated that it occurs in inexhaustible quantities and is 

 obtainable in blocks of large size. At Glencoe, above Golden, in Jefier- 

 son County, there occurs a deep salmon-red stone of a beautiful warm 

 and lively hue. It is said to work with considerable diificulty, but 

 is much sought on account of its color. Its principal market is now 

 Chicago, but it is a matter of regret that it can not be introduced into 

 our eastern markets. Near Morrison, in the same county, there occur 

 extensive beds of red and nearly white sandstone. Tlie white is not 

 considered desirable, but the red is much sought for trimming pur- 

 poses. It is stated to absorb water readily, and hence to be peculiarly 

 liable to damage from frost. The light-colored stone used in the con- 

 struction of the court-house at Denver was obtained from Cretaceous 

 beds near Caiion City. Trinidad, Las Animas County, also furnishes 

 a good sandstone, which is used in Denver, and another important stone 

 of good quality is brought from Amargo, in Rio Arribo County, across 

 the line in New Mexico. 



Connecticut. — As already noted (ante, p. 289) the first quarries of sand- 

 stone to be systematically worked in this country were those located 

 in the now well-known Triassic beds at Portland and Middletown in this 

 State. The area of the Triassic deposit in Now England as given by 

 Dana* extends from New Haven on Long Island Sound to northern 



* Manual of Geology, p. 404. The entire area of the Triassic Banilstoncs in the 

 United States as given by this authority is divided into three parts : (1) the Connec- 

 ticut area as given above ; (2) the Palisade area, commencing along the west side of 

 the Hudson River in the southeast corner of New York, near Piermont, and stretch- 

 ing southwestward, through Pennsylvania, as far as Orange County, Va., about IJaO 

 miles long ; and (3) the North Carolina area, commencing near the Virginia line and 

 extending through North Carolina over the Deep River region, 120 miles long. 



