CONTENTS. XV 



Production of Serpentine through alteration of other rocks than Peridotitc, 191. 

 Literature of the Serpentine question, 191. Talcose llocks derived from 

 Peridotites, 191, 192. Steatite Hocks alteration forms of Gahliro and Diaha.se 

 (Diorite), 192. Actinolite and other schists derived from Peridotitc, 192. Am- 

 phibole Schists, 192. Origin of Magnesian Limestones, 192. Explanation of the 

 alterations, 192. 



SECTION X. 

 Peridotite. — Its Classification 102-194 



The use of Specific and Varietal Names, 192. Definition of Peridotite, 192. 

 Basis of varietal distinctions, 193. Definition of the varieties, 193. Alteration 

 varieties subordinate to the original mineralogical ones, 193. Probable varieties 

 to be found by future study, 193. Most variety names not important, 193. 

 Limburgite of Rosen'buscii, 193. Terms applied to the fragmental forms of 

 Peridotite, 193, 194. Tabular Classification of Siderolite, Pallasite, and Perido- 

 tite, 194. Essential terms in describing Peridotites, 194. 



CHAPTEE IV. 



THE BASALTS. 



SECTION L 

 The Meteoric Basalts 195-20G 



Variety.— Basalt, 195, 19G. 



Stannern, Moravia, 195. Constantinople, Turkey, 195, Jonzac, France, 196. 

 Petersburg, Tennessee, 196. Frankfort, Alabama, 196. 



Variety. — Gabbro, 196-205. 



Luotolaks, Finland, 196. Masshig, Bavaria, 197. Juvenas, France, 197. 

 Shergotty, India, 197, 198. Maskelynite, 198. Pawlowka, Russia, 198. Le 

 Teilleul, France, 198. Bishopville, South Carolina, 199-201. Chladnite, 199. 

 Aqueo-igneous origin of Eruptives, 201. Manegaum, India, 201, 202. Busti, 

 India, 202. Shalka, India, 202. Ibbenbuhren, Westphalia, 202. Greenland, 

 202-205. Assuk, 203. Ovifak, 203, 204. PfafF-Oberg, 204, 205. General 

 Structure of the Meteoric Basalts, 205 ; not fragmental, 205. Nomenclature, 

 205. Future changes, 206. 



SECTION IL 



The Pseudo-Meteorites 206-208 



Waterville, Maine, 206, 207. Piichland, South Carolina, 207. Igast, Russia, 

 207, 208. Waterloo, New York, 208. Concord, New Hampshire, 208. Ande- 

 site type, 208. 



