INDEX. 283 



Montg;lban system in Nashua and Merrimao Valleys, 154-161. 



in Rhode Island, 127-128. 



in Western Mass., 126-127. 



limestone of, 139. 



lines of strike of, in Mass., 129. 



mechanical origin of the rocks of, 145-152. 



mica slate of, 136-137. 



minerals of, 125. 



newer than Huronian, 153-154. 



steatite in, 125-126, 127, 128. 



stratigraphical breaks In, 144. 



subdivisions of, 129. 

 Moon Island, rocks of, 223. 



Nahant, analysis of feldspar on, 17. 



analysis of limestone on, 262. 

 Naugus Head series on, 14, 15, 16. 

 slate on, 195, 261-263. 

 Nantasket, geology of, 197-201. 

 Narragansett basin, relations to Gulf of Maine, 182. 

 Nashua Valley, geology of, 129, 131, 136-139, 142-144. 



stratigraphy of, 154-161. 

 Naugus Head series, 14-23. 



characteristic minerals of, 15-18. 

 coarse feldspar of, 15, 16, 17. 

 exotic rocks of, 14, 15, 22. 

 general relations of, 13, 21. 

 in Brookline, 23, 231. 

 in Medford and Somerville, 22. 

 in Franklin, 23, 104. 

 in Reading, 23. 

 in Sharon and Foxboro', 23. 

 labradorite in, 16, 17, 18. 

 lithological characters of, 15-18. 

 relations of to Huronian, 14, 18-22. 

 resembles Norian system, 13, 21. 

 stratified rocks, of, 15, 16. 

 New Brunswick, geology of, 162-163. 

 Norian rocks in, 20. 

 Newbury, limestone in, 112-115. 



toadstone in, 57-60. 

 New England, prevalent lines of strike in, 2. 

 New England geological province, longitudinal division of, 3. 



outlines of, 1. 

 Newfoundland, geology of, 163. 



relations of to New England, 1. 



relations of uncrystalline rocks to topography in, 181. 

 Newport, R. I., geology of, 179-180. 

 Nichols, W. R., on kaolinite, 272-273. 

 Niles, W. H., relations of granite and slate, 37-38 



