THE COESTEE AMPHIBOLITE AND SERPENTINES. 93 



that at a somewhat greater depth bed No. 4, which coiihl be very easily worked with 

 No. 3, would yield some good white marble. A part of the banded marble iu beds ') 

 and G is of a decidedly ornamental character and well adai)ted for some kinds of 

 decorative work. 



At the north end of the (luarry a dike of granite cuts off the strata, and although 

 there are indications that the marble continues beyond it, this has not been i)roved. 

 So far as known, the marble is entirely wanting north of the river. South of the 

 quarry the marble beds, although not actually exposed, are quite certainly continuous 

 for 200 to 300 feet, when they are again cut off by a mass of granite. 



The quarry, to vs^hich I was guided by Professor Crosby, is situated in 

 the extreme western part of Westfield, and is reached by lea\nno- the electric 

 cars at the crossroads east of the old Atwater place and going three-quarters 

 of a mile south, passing two houses south of the Little River bridge, and 

 going west by a field road, which runs northwest about a half mile to a 

 point 380 feet above the sea and overlooking the valley of Little River. 



The quany throws much light on the problem of the origin of the 

 enstatite beds. It contains tln-ee distinct beds of first importance: 



The first, the "black marble," like that of the old Atwater quaiTy, is a 

 black enstatite rock of coarse grain and wholly massive stracture and 

 slightly bronzy luster (the enstatite cleavage showing in faces one-half inch 

 in width by 2 to 4 inches in length), now in various stages of serpentinous 

 change, and mottled with foliated masses of bastite (marmolite), derived 

 from the enstatite, which are of high luster and rich apple-green color. 



The second bed is a black spotted marble — a white or gi'ayish, rather 

 coarsely crystalline, magnesian limestone — containing much shining tremo- 

 lite, effervescing moderately with strong hydrochloric acid, and spotted with 

 elongate crystals of the same black altered enstatite, one-quarter to one-half 

 inch wide and 2 to 6 inches long. These make a very regular reticulate or 

 open network over the prevailing white surface of the marble, forming a 

 remarkable rock. At times black squares of the mineral, with lighter and 

 less changed centers, are interspersed with the narrower rods, and the latter 

 radiate from the centers and sides of these squares with some regularity, 

 and connect them into a stellate pattern (see fig. 8, p. 152). Again the 

 squares may wholly replace the rods. 



These two beds are of massive sti-ucture and furnish large blocks, 

 which take a fine polish and promise to be of economic importance. 



The third bed, which connects the other two, is a thin, flat-foliated, 

 |)ale-green to Avliite marble, with films and flat small lenses of pale-green 



