“Indurated Bitumen” in the trap of the Connecticut valley. 181 
were occupied partly by a similar bitumen, and partly by a dark 
green chlorite.” “Copper has been found in veins in the anterior 
amygdaloidal ridge west of the Hanging Hills,” near Meriden, 
and “a similar bitumen is found in the matrix of the veins, which 
consists ons geri calcareous spar and sulphate of barytes 
Page . In the trap range west of Middletown “ where the 
stream (ihe "Mattabesick) crosses the third (Eastern) ridge, con- 
siderable quantities of indurated bitumen have been found in the 
the 
trap appears as a dike and is oon \etially eS brown indu- 
rated shale small veins occur” in the trap and shale <ieeeioet 
ituminous limestone,” and here there is a dike of indurated clay 
with disseminated bitumen, “adjoining which the shale sowie 
in cross seams of brown spar with bitumen and 
age 385. Near the north point of Farmmgton Mosca west 
of north from New Britain, the amygdaloid ‘ Ya setamsang in agates 
and has its pores partly occupied “i indurated bit 
The localities above mentioned are within escape miles of 
ew heaping to the northeast and north. 
388. South of Hartford, toward the psgnanle end of the 
ay ridge called Rocky Hill, ai als it is nearly east and west in 
course, it “ crosses a wide valley in in which is a aed bed of bitu- 
minous shale containing fish i impressions, recently excavated for 
coal.” The ridge terminates toward the north in low swells of 
rated sk loid; and just northeast is a mass of dark gk ar — 
assic Sandstone formation grat often containing 
nee " eaoutoh u dedér in the e eesleneiri shale and 
estan and the latter, particularly, is sometimes impregnated 
with n naphtha? 
Percival’s facts thus have great importance toward settling the 
i, as to the origin of the Aerts of the ae — 
ey w that the material occurs in the Triassic rocks 
naphtha; as a flexible haiciadurated sab tae, which he sailed 
caoutchouc; and as a firm, brittle coal-like reper which he calls 
indurated bitumen. Professor C. U. She epard, h is associate in the 
Survey of Connecticut, mentions the “ a Um, bitumen” (Rep. 
