CONTENTS. xiii 



Vakietv. — Serpentine, I'i^- ICl. 



Fitztown, Pennsylvania, 152. l"'nuiken.->toiii, Silusia, l')'^. Lcko, Norway, 1.02. 

 Waldheim, Saxony, 15.3. Thessaly, 153. Santiago, San Doinin<,'o, 15.'}, 15 1. 

 La Vega, San Domingo, 154. lirixlcgg, Tyrol, 154. II Piano, Ell>a, 154, 155. 

 Tasmania, 155. Windisch-Matrey, Tyrol, 155. St. Sabine, France, 155, 150. 

 River Oisain, Timor, 156. Riviere des Plantes, Canada, 150. Melbourne, Canada, 

 156. Galicia, Spain, 150. High Bridge, New Jersey, 150, 157. Zoblitz, Sax- 

 ony, 157, 158. Chip Flat, California, 158. Depot Hill, (Jalif'oniia, 158. Plnma.s 

 Co., California, 158. Finland, 158. Klopfberg, Austria, 15'J. Nezeros, Thes- 

 saly, 159. Fatu Tcmanu, Timor, 159. Wcstfield, Massachusetts, 159, 100. 

 Formation of Talc, 159. Lynufield, Massachusetts, 100. River Joa, San 

 Domingo, 100. Newport, Vermont, 101. Celinac, Austria, 101. Texas, Penn- 

 sylvania, 101. Chester, Pennsylvania, 101. 



Vakietv. — Porodite, 101, 102. 

 Fatu Luka, Timor, 101, 102. Strand, Timor, 102. 



SECTION V. 



Peridotite. — Its JMacroscopic Characters 162-165 



Structure of the jNIeteoric Peridotites, 102. Structure of the TeiTestrial 

 Peridotites, 103-105 ; least altered forms, 103; alteration characters, 103. Ap- 

 pearance of the Olivine Gi'oundmass, 163. Alteration of the Pyroxene Minerals, 

 163, 164. Segregations in Serpentine, 164. Translucency of Serpentine, 104. 

 " Slickensides " in Serpentine, 104. Products of extended alteration in Perido- 

 tite, 164. Term Serpent i lie m Mineralogy, 164. Variability of Serpentine, 164 ; 

 Schistose Structure in, 164. Production of Talc and Actinolite Schists, 104, 105 ; 

 of Dolomitic Limestones, 165. Fragmental states of Peridotite, 105. Origin of 

 Ophicalcites and brecciated Serpentines, 105. Introduction of the terms Merolite 

 and Merolitic for pseudo-fragmental rocks, 165. 



SECTION YL 

 Peridotite. — Its Microscopic Characters 165-175 



General Microscopic Structure of the Meteoric Peridotites, 165-167. The Rase 

 of, 166. The Chondri of, 166. The Olivine of, 166. The Enstatite of, 166. 

 The Iron and Pyrrhotite of, 166, 167. The Chromite and Picotite of, 160. 

 The Manbhoom Saxonite, 107. Union of Diallage and Augite Cleavage in Dial- 

 lage, 107. Lherzolitc, 107. Minor minerals in Meteoric Peridotites, 107. Frag- 

 mental Meteorites, 187. Microscopic characters of the Terrestrial Peridotites, 

 108-175; of Dunite, 168; alteration to Serpentine, 168. Transition in tlie 

 varieties of Peridotite, 168. Characters of Enstatite, 168, 169 ; of Diallage, 169 ; 

 of Augite, 169. Alteration of the Pyroxene Minerals, 169. Description of the 

 alterations in the Peridotites as shown in the plates, 169-172. The Eozoon ques- 

 tion, 172-174. Organic structure simulated in Felsites, 173. The snpiKiscd 

 Eozoon, and other organisms, the nioi'o perfect, the more the rock is altered, 173. 

 Tlie inclination to unduly extend one's line of study, 173, 174. Crucial tost in 

 disputed problems, 174. The Eozoon in segregated or veinstone deposits, there- 

 fore not of organic origin, 174. Microscopic characters of Picrite, 174, 175. 



