THE EOCEXE DEPOSITS OF MAEYLAXD 



Feet. 



Pleistocene. 



Eocene. 



V. Section three miles below Potomac Creek. 



Sand and graTel 2 



(' Greenish-gray argillaceous sand (Zone 15) -i 



Greenish-gray argillaceous sand with gj'psum crystals (Zone 



I 14) '. 5 



S g< <| Light gray greensand with band containing Yenericardia . 



c -g I potapacoensis (Zone 13) i 



I Greenish-gray argillaceous sand (Zone 12) 10 



(^ Indurated greensand with Venericarclia potapacoensis (Zone 11) 1 



s 



C 

 03 



Total. 



26 



VI. Section at Head of Xanjemoy Creek. 



Feet. 



Pleistocene. Sand and gravel 4 



>^ ^ { Greenish-gray argillaceous sand with layers containing 



2 jJ I Verier tear diet potapacoensis (Zone 15) 11 



Eocene. ."" §" 1 Light gray greensand with gypsum beds (Zone 14) 6 



H -g [ Light gray greensand with Fe7ier*c'«rf7iff/)o?«/)«foe««is (Zone 13) 3 



<^ ^ Covered to tide 75 



Total 99 



Pleistocene. 



VII. Section three miles above Popes Creek. 

 Gravel and sand , 



Eocene. 



a s 



Argillaceous greensand (Zone 15) 



g a J Greensand with gypsum crystals (Zone 14) 



"a -2 



^^ I Total 



VIII. Section two and one-quarter miles above Popes Creek. 

 Neocene. Diatomaceous earth 



. o o ' Greensand with fossil casts (Zone IT) 



^ L? ° ■) Greensand, somewhat argillaceous (Zone 16) 



a 1^ " ( 



6 ( Grayish black argillaceous greensand (Zone 15) with num- 



^ § ' erous bands of Yenericardia potapacoensis 2i\iA other fossils, 



j j2 ^ ( overlaid by a band of concretions .' 



Feet. 

 3 



14 



Feet. 

 10 



10 

 30 



Eocene, .a^ \ 



3 



Total. 



IX. Section of center of bluff at Woodstock. 



Pleistocene. Yellow and orange-colored sands and gravel 



Neocene. Diatomaceous earth with Miocene fossils 



[' Argillaceous greensand (Zone 17) 



I Dark greensand more or less argillaceous with Mitra potoma- 



I ce7isis, Strepsidura subscalarina, Turritella potomacensis, 



3Iesalia obruta, Corbnln oniscuSy Jferetrix subimpressa, Pro- 



tocardia lenis, Pecten dalli, Ostrea seUaeforniis, Glijci/meris 



Eocene, a -[ '^ [ idonens and Leda cultelliformis (Zone 16) 



Z f Greensand with TornateUaea bella, Cylichna venitsta, Etngicula 

 5, j dalli, Yenericardia potapacoensis and other forms (Zone 15) 



Feet. 



l^ 



Total 



