INTRODUCTION

 

 

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1

 

 

 

GEOLOGIC OVERVIEW

 

 

Jean Prior

2

 

 

 

BEDROCK GEOLOGY OF BLACK HAWK AND BREMER COUNTIES

 

 

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7

 

 

 

SILURIAN-DEVONIAN AQUIFER

 

 

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10

 

 

 

The interstate substitution program

 

 

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12

 

 

 

Cedar Falls Prairie Lakes Excavation Site

 

 

James Walters

13

 

 

 

Cedar Hills Sand Prairie

 

 

Daryl Smith

19

 

 

 

Cedar Bend Savana

 

 

Daryl Smith

26

 

 

 

Yokum Quarry, finchford

 

 

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41

 

 

 

Silurian-Devonian unconformity Loomis Quarry

 

 

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48

 

 

 

Paha area, west of denver

 

 

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57