xviii TABLE OF CONTENTS. 
Page. 
Localities of conglomerate of this era... 160 
Topographical features; hilly; peculiar characters... 160 
Examples: Long island, Hudson valley, Connecticut, Massachusetts. 161 
Mantle of drift over all Northern States and Territories. 162 
Sometimes covered with quaternary and alluvial... 162 
Great development of drift in the prairie region of the West... 162 
Features strongly marked; mirage of prairies ... 162 
Terraces of prairies; lines of boulders like coast line. 162 
Boulders now deposited similar in appearance and similarly grouped. 162 
In groups and scattered. .. 163 
Boulders and erratic blocks . 163 
Definition.... 163 
Form not always due to attrition. 163 
Atmospheric agency. Examples. 163 
Gravel and pebble beds due to aqueous causes. 164 
Boulders distributed over hills and mountains as well as plains and valleys, often far 
distant from their sources.• 164 
Boulders of Long island and Hudson valley from the northward . 164 
Evidences; general division of the subject. 164 
Boulders of Long island.. 165 
Easthampton. 165 
Near Nepeage beach. 165 
From Nepeage beach to Montauk point. 165 
Of what composed. 165 
References to similar rocks in place. 165 
On Shawango Neck and near Fort pond... 166 
Culloden’s and Jones’ reefs. 166 
Kidd’s money. 167 
Near Three-mile harbor . 167 
Between-Springs and Fireplace. 167 
Southhampton, near Sagg-harbor.•. 167 
Between Canoe-place and Sagg-harbor. 167 
Shinnecock hills. 167 
Red oxide of iron throughout the hills of Long island. 167 
In groups in the Shinnecock hills. 168 
Southold; section of drift near Horton’s point... 168 
In some places disintegrated in the clay beds. 168 
Referred to localities of similar rocks. 168 
Sections showing position of. 168 
Singular veins in. 169 
At Horton’s point. 169 
Size of; description of large one at Oyster-pond point. 160 
