
CONTENTS xi 
CHAPTER “X 
JOINTS 
PAGE 
Joints Close and Gaping. Joints in Bedded Rocks—Master-joints, 
Dip- and Strike-joints. Joints in Igneous Rocks—in Granitoid 
Rocks, Prismatic Joints. Joints in Schistose Rocks. Slicken- 
sides. Origin of Joints—Contraction, Expansion, Crustal 
Movements : : : : ‘ - 144-154 
CRAPPER EAT 
FAULTS OR DISLOCATIONS 
Normal Faults. Dip-faults and Strike-faults—their Effect upon 
Outcrops. Oblique Faults. Systems of Faults. Step-faults. 
Trough- and Ridge-faults. Shifting of Faults. Reversed 
Faults. Transcurrent Faults. Origin of Faults : 155-176 
CHAPTER XII 
STRUCTURES RESULTING FROM DENUDATION 
Outliers and Inliers. Unconformity. Overlap. : 177-183 
CHAPTER XIill 
ERUPTIVE ROCKS: MODE OF THEIR OCCURRENCE 
Intrusive Eruptive Rocks. Plutonic or Abyssal and Hypabyssal 
Rocks—their General Petrographical Characters. Batholiths 
—Granite as a type; phenomena along line of Junction with 
Contiguous Rocks ; Xenoliths ; speculations as to Assimilation 
of Rocks by Granite, etc. Laccoliths of North America. 
Sills or Intrusive Sheets appear to be much denuded Lacco- 
liths. Necks or Pipes of Eruption—their General Phenomena 184-201 © 
CHAPTER XIV 
ERUPTIVE ROCKS: MODE OF THEIR OCCURRENCE— 
continued 
Dykes and Eruptive Veins—their General Phenomena. Composite 
Dykes. Exogenous or Intrusive Veins—their association with 
Batholiths, etc. Endogenous or Autogenous Veins—Pegmatite 
Veins; General Phenomena of Contemporaneous Veins. 
Segregation Veins. Effusive Eruptive Rocks—Crystalline 
Effusive Rocks and Pyroclastic or Fragmental Effusive 
Rocks ; . ° . . : : 202-211 
