CONTENTS 



Page 



Stratigraphic relations 158 



Lithologic character 158 



Strike, dip, and thickness 159 



Paleontologic character 159 



Areal distribution 159 



Detailed sections 160 



York River 160 



James River 162 



Pliocene (?) 175 



The Lafayette formation 176 



Name 176 



Lithologic character 176 



Strike, dip, and thickness 178 



Stratigraphic relations 178 



Paleontologic character 178 



Areal distribution 178 



Quaternary 179 



Pleistocene 179 



Columbia group 179 



The Sunderland formation : 181 



Name 181 



Lithologic character 181 



Strike, dip, and thickness 182 



Stratigraphic relations 182 



Paleontologic character 182 



Areal distribution 183 



The AA'icomico formation 183 



Name 183 



Lithologic character 183 



Strike, dip, and thickness 184 



Stratigraphic relations 184 



Paleontologic character 184 



Area] distribution 185 



The Talbot formation 185 



Name 185 



Lithologic character 185 



Strike, dip, and thickness 187 



Stratigraphic relations 188 



Paleontologic character 188 



Areal distribution 189 



Recent 189 



CORBELATION OF THE VIRGINIA COASTAL PlAIX 191 



Cretaceous 191 



Lower Cretaceous 191 



Tlie Patuxent formation 192 



The Patapsco formation 194 



Upper Cretaceous 195 



Tertiary 199 



Eocene 200 



The Aquia formation 200 



The Nanjemoy formation 201 



Miocene 202 



The Calvert formation 203 



St. Mary's formation » 203 



The Yorktown formation 204 



Pliocene (?) 205 



The Lafayette formation 205 



Quaternary 205 



Pleistocene 20G 



