SUPERINTENDENT
~Herbert E. Gregory~

_Publication Approved by the Board of Control_

Drainage Modifications and Glaciation
in the Danbury Region
Connecticut

By
RUTH SAWYER HARVEY, Ph. D.

HARTFORD
Printed by the State Geological and Natural History Survey
1920

CONTENTS.
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Page

Introduction 9

Regional relations 11

Rocky River 15
Description of the river and its valley 15
Relation of the valley to geologic structure 16
Junction of Rocky and Housatonic Rivers 18
Abnormal profile 18
Preglacial course 20
The buried channel 23
Effect of glaciation 25

The Neversink-Danbury valley 27

Still River 30
Statement of the problem 30
Evidence to be expected if Still River has been reversed 31
A valley wide throughout or broadening toward the south 32
Tributary valleys pointing upstream 34
The regional slope not in accord with the course of the Still 35
Evidence of glacial filling and degrading of the river bed 36
Glacial scouring 36
The Still-Saugatuck divide 38
Features of the Umpog valley 38
The preglacial divide 42
The Still-Croton divide 43
Introduction 43
Features of Still River valley west of Danbury 43
The Still-Croton valley 44
Glacial Lake Kanosha