CONTENTS. 
Page. 
setter of transmittal . . . 7 
ntroduction . . 9 
jiterature _. 9 
jand form 18 
Green Mountain Range _ . 18 
Taconic Range 19 
Transverse valleys ■ 19 
Longitudinal valleys 20 
Rensselaer Plateau 20 
Hudson-Champiain valley 21 
?he Taconic landscape 21 
The lakes 22 
topographic types '. 23 
Plateau type 23 
Taconic type 23 
Hudson-Champiain type 23 
lock material 23 
Harder rocks 24 
Rocks of intermediate hardness 24 
Soluble rocks . _ ! 24 
Rocks disintegrated chiefly by physical processes 24 
Relation of rock material to surface form 24 
lock structure 26 
General structural characteristics 26 
Secondary structures 27 
General relation of structure and material to form 28 
Crosion 29 
General effect . . 29 
Processes of erosion 34 
Stream erosion 34 
Glacial erosion 36 
Particular effects . 38 
Anticlinal hills 39 
Synclinal hills ... ... 40 
Dissected hills 40 
Outliers 41 
Inliers 41 
Anticlinal valleys 42 
Synclinal valleys 42 
Ravines 43 
Fault scarps . 45 
Talus slopes ... 46 
he lakes as related to rock structure 47 
Conclusion 47 
index 51 
