282 INDEX. 



Jackson, C, T., geology of Ehode Island, 128. 

 " Saugus Jasper," 76. 



Kaolinite, in Roxbury, 272. 



analyses of, 273. 

 Labradorite, 16, 17, 18, 21. 

 Laurentian axis of Appalachian region, 2. 

 Laurentian rocks, absent from western New England, 2. 



of the Highlands of the Hudson, 2. 

 Limestone, Huronian, minerals of, 113-114, 115. ■ 

 serpentine of, 113, 115. 

 stratification of, 113-114, 115, 116. 

 Limestone, Montalban, Eozoon in, 139. 

 minerals of, 125. 

 stratification of, 139. 

 Limestone, Primordial, analysis of, 262 



in Weymouth, 193, lfl5. 

 on Nahant, 195, 262. 

 Long Island, geology of, 223. 

 Lovell's Island, geology of, 223 

 Lynnfield, limestone in, 115. 



Maine, crystallines of, 8. 



Maiden, slate in, 259. 



Marblehead Harbor, age of, 264. 



Marblehead Neck, concretionary structure in petrosilex on, 60-61. 



Norian boulder found on, 21. 



Primordial series on, 263-265. 



relations of granite to schist on, 38. 



relations of petrosilex to breccia on, 51-52. 

 Martin's Ledge, 216. 

 Massachusetts, prevalent lines of strike in, 9. 



surface geology of, 9, 10. 

 Matthew, G. ¥., 181, 183. 



Acadian geology, 8. 

 Norian rocks in New Brunswick, 20. 

 Merrimao Valley, stratigraphy of, 154-161. 

 Mica slate, Montalban, 136-137. 



relations to argillite, 143—144. 

 Milton, breccia in, 175. 

 Montalban system, 123-163. 



argillite of, 137-139. 



characteristics of, 123-124. 



chemical gradation in rocks of, 153. 



endogenous granite of, 130, 135. 



Eozoon canadense in limestone of, 125. 



gneiss of, 135-136. 



granite of, 130-135. 



general relations of, in Eastern Mass., 13. 



general relations of the rocks of, 140-154. 



