T M D F Y 



■An mkm 1| l M" .»l' JmmmUm lAl JIm S 



-A., Page. 



AbingtoD, Mass., latilt in 129 



Abmgton quadrangle, Coal Measure beds m 193-194 



Achelaus Hill, West Newbury, Mass., Cambrian 



rocksat :.. .... 388 



Acknowledgments to coadjutors 211 



Agraulus strenuus, occurrence of 389, 390, 391, 392 



Alethoptens, occurrence of - 181 



Allegheny Mountains, age and character of 10 



Almys Pond, R. I., granite near 316 



Amphibolite m dike at Lincoln, character of . . , 108 



Analyses, coals ...... 83,161,191 



limestone 150 



Annularia, occurrence of 191,285 



Annularia longifolia, occurrence of 268,320,321 



Anthracomartus woodruflB, occurren ce of 202 



Appalachian Mountains, ancient mountain range 



east of and parallel to .,.-.. ..- U 



difference m degree of erosion in eastern and 



western parts of 40-46 



difference in form of folds on east and west 



sides of 12~1B 



folds of 10-13 



form and origin of basins east of 13 



Aq uidneck Coal Company, oi>erations of 207 



\ quidneck Island, R I , Aquidneck shales on- ...... . 252-358 



coal beds of,-- 79,80 



coalmine in , ».,, 207 



folds on , 345 



granite area on , 273-274 



rocks of , 284-330 



suggested exploration for coal on , - . 85 



Aquidneck shales, areal distribution ot - 361 



debatable question as to inclusion ot Kingstown 



series m xviii-xix 



equivalence of Kingstown sandstones and 361-363 



foldersof 394 



fossils of-, 363 



geologic equivalents of - , 358-359 



occurrence and character of , , . 348-363 



table showing geologic place and equivalents of. 134 



thickness of 352-354,357-358,359 



view of wave-cut bench in , ^ , 352 



view sbo wing ff-etwork featbering of. 362 



Arkose, occurrence and significance of . , . « , , .. 50-55 



Ashton, R I., Cumberland quartzite at 106 



Ash ton schists, occurrence and character of 107 



Asterophyllites, occurrence of , 174,191 



Asterophy lutes equisetiformis, occurrence of . . . 168, 204 



Atlantic co^t, basins of sedimental depression on , . 13-15 



Carboniferous basmsof 38-39 



character and exteat of erosion on . , 44-46 



geologic history of shore land basins of 30-36 



Page. 



Attleboro, Mass., analysis of limestone from 1 50 



Carboniferous beds in 175-180 



sections at and near 153,176,177,182 



synclmeat 179-180 



view of Carboniterous sandstones at , 176 



views of conglomerate at and near 176, 184 



\iew of pebbles from Bighton conglomerate near. 18Q 



view of raindrop imprints on rocks near 178 



view of npple-marked sandstones near 178 



Attleboro district, Cambrian strata and fossils of . . . 38t5-393 



Attleboro sandstone, occurrence and character of . . 151-152 



table showing geologic place and equivalents of. 134 



Arachnida, occurrence of 202 



Archean rocks, occurrence and character of. , . 114-118 



Arkose, occurrence, character, and significance of. . 60-58, 



135-139, 284-286, 875-380 



Arnolds Mills, R. I., granite porphyry at ... , 117 



geologic section of beds near 157 



Barbers Height, R. I,, Kingstown series at 334 



Barton, G. H., acknowledgments to 211 



cited as to anticlinal structure of Hanging Rock 



district - 299 



cited on structure ot Hanging Rock ridge .... 367 



Basal conglomerates, occurrence of , 375-380 



Base-leveling, general character and extent of 47-49 



marine actions contributory to 70 



Beacon Hill, R. I , conglomerates at and near 304, 305, 369-370 



Beaver Head,R I., rooks oi - 338-339 



Bibliography of the Cambrian and Carboniferous 



rocks 212-214 



Bishop Rock, R.I., shales near 305-306 



Black Point, R. I,, rocks near 290-293, 364 



Blaokstone Coal Company, operations of. 206 



Blackstone River, folded and faulted Carboniferous 



shales on 162 



Blackstone series, geologic place of g 



occurrence, character, and relations of 104-109 



Blake Hill, Mass., fault block at ^. iso 



faults near 183-184 



thrust plane at 133 



Blattmarise, occurrenceof , , 203* 



Bogs, agricultural utilization of 73-79 



Bonnet (The), R. I., Kingstown series at .. 333, 334, 337, 344 

 Boston Basin, Mass., geologic history of 13-15, 24-25 



erogenic action in 24-25 



Boston Heck, R. I*, faulting near 377 



Kingstown series at 333 



Bowlder clay, thickness and character of 69-70 



Bowlder trains, length of 71-72 



Brachiopods, Cambrian, occurrence of . ... 109,110 111,112 



395 



