CONTENTS. 
lii 
CHAPTER IX. 
UPPER SECONDARY FORMATIONS. 
Supennedial Order, (CretaceotiSf Oolitic ^ and Sandstone Groups.—' 
De la Beche.) 
Upper Secondary Rocks : how divided. — Secondary Rocks of 
England.— New Red Sandstone.— Oolite. — Green Sand. — 
Chalk.— Flints Page 94 
CHAPTER X. 
TERTIARY STRATA. — (Superior order, Conybeare.) 
{Supra-cretaceous Group of De la Beche.) 
Tertiary Strata. — What they include. — Lower Tertiary. — Lon- 
don Clay, — Middle Tertiary. — M. Deshaye's Classification. — 
Mr. LyelPs Classification. — Eocene. — Miocene.— Pliocene. — 
Crag. — Sections of the Thames Valley. — Thickness of Ter- 
tiary Beds in England 109 
CHAPTER XL 
BASALTIC AND VOLCANIC ROCKS. 
Volcanic Formations. — Trap Rocks, — Mineral Composition. — 
Augite Rocks. — Basalt. — Greenstone. — Trachyte. — Clink- 
stone. — Porphyry. — Amygdaloid. — Lava. — Scoriae. — Pumice. 
— TufF. — Conglomerates. — Wacke. — Whinstone. — Pitch- 
stone. — Volcano of Kirauea. — Trap Dikes. — Fingal's Cave. — 
StalFa.— Rocks altered by Dikes.— Faults.— How they cause 
a Dislocation of Strata 114 
CHAPTER XIL 
ALLUVIAL AND DILUVIAL DEPOSITES. 
Alluvial Deposites. — Bowlders.— Diluvial. — Mr. Lyell's Theory. 
—Post Tertiary.— Modern Deposites : Terrestrial, Lacustrine, 
Fluviatile 129 
CHAPTER XIIL 
AGENTS WHICH DESTROY ROCKS. 
Proofs of Changes on the Earth's Surface. — Mechanical Agents 
which destroy Rocks : Rains, Torrents, Rivers, Seas.— The 
Atmosphere.- Influence of the Sea upon the Land— In Europe 
—In America . . 132 
