CONTENTS. XV 



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

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

 Poridotites, 191, 192. Steatite Rocks alteration forms of Gabbro and Diabase 

 (Diorite), 192. Actinolite and other schists derived from Peridotite, 192. Ani- 

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

 alterations, 192. 



SECTION X. 



Peridotite. — Its Classificatio)^ 192-194 



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 miueralogical ones, 193. Probable varieties 

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

 Limburr/ife of RosEXBUSCH, 193. Terms applied to tlie fragmental forms of 

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

 tite, 191. Essential terms in describing Peridotites, 194. 



CHAPTER IV. 



THE BASALTS. 



SECTIOX I. 

 The Meteoric Basalts 195-20G 



Variett.— Basalt. 195, 196. 



Stannern, Moravia, 19.5. Constantinople, Turkey, 195. Jonzac, France, 196. 

 Petersburg, Tennessee, 196. Frankfort, Alabama, 190. 



Variett. — G-abbro, 1 96-205. 



Luotolaks, Finland, 196. Massing, Bavaria, 197. Juvenas, Franco, 197. 

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

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

 Aqueo-igneous origin of Eruptives, 201. ]\Ianegaum, 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-Meteop.ites 206-208 



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

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

 site type, 208. 



