CONTENTS 



PAGE 



PREFACE ^'^ 



INTRODUCTION 21 



DEVELOPMENT OF KNOWLEDGE CONCERNING THE PHYSICAL 

 FEATURES OF PRINCE GEORGE'S COUNTY, WITH BIBLIOG- 

 RAPHY. By Bexjamin L. Miller 24 



24 

 IJSTTRODUCTORY 



HisTORTCAL Review ■'^ 



General Contributions -'^ 



Historical Review of the Various Geologic Groups 27 



The Crystalline Rocks of the Piedmont Plateau 27 



The Lower Cretaceous 28 



The Upper Cretaceous 29 



The Eocene ^^ 



The Miocene ** "- 



The Pliocene ( ?) and Pleistocene 32 



Bibliography ^^ 



THE PHYSIOGRAPHY OF PRINCE GEORGE'S COUNTY. By Bex.tamin 



L. Miller ^^ 



INTRODUCTORY 



TOPOGRAPHIC Description '^^ 



Topographic Features '^^ 



Tide Marshes ^'^ 



Lafayette Plain "^^ 



Sunderland Plain 'J* 



Wicomico Plain ^_ 



Talbot Plain ^^ 



The Drainage of Prince George's County "<» 



Stream Divides 



Tidewater Estuaries ' ^ 



The Potomac River 1' 



The Patuxent River "^ 



TOPOGRAPHIC History 



The Lafayette Stage '^^ 



The Sunderland Stage *" 



CI 



The Wicomico Stage 



The Talbot Stage ^^ 



The Recent Stage ^^ 



THE GEOLOGY OF PRINCE GEORGE'S COUNTY. By BEXJAiii.x L. 



Miller ^^ 



83 

 Introductory 



S4 

 The Crystalline Rocks °^ 



