TABLE OP CONTENTS 
CHAPTER I. 
Page. 
Introduction. 1 
Extent of the district examined. 1 
Rock formations and classification. 2 
Sketch of the distribution of these formations. 2, 3 
CHAPTER II. 
aUATERNARY SYSTEM. 4 
Subdivisions, alluvial, quaternary and drift. 4 
1. Alluvial division. 4 
{a), Fluviatile alluvions . 4 
Of the Hudson, Overslaugh. 5 
Tributaries of the Hudson. 5 
Wood creek on Lake Champlain. 6 
Ooze flats and islands of the Hudson. 7 
Bottom lands of the tributaries of the Hudson... 10 
{h). Lacustrine and marsh alluvions . 10 
a. Lake or shell marl..•• 10 
Causes of formation. 10 
How it may be recognized. 11 
Use^. 11 
Description. 12 
b. Peat, and description of. 12 
Locations in which it is found. 13 
Reason why confined to temperate and cold climates. 13 
Localities of peat and marl. 14 
(c). Marine alluvions . 17 
Salt marshes. 17 
Causes of their formation. 17 
3* 
