CONTHNTS 



I'ACiK 



I'KKFACK [ 15 



THE EOCENE DEPOSITS OF MAKYLANI). IJv Wii.i,ia.m \Ui.uhk (i.aick 



AND OkuUOE CUKTIS Mautin ] ;) 



I \ I'itoDHCTION , 21 



II isiDuic \i, i;i;vii:\v -^4 



liini.ioouAi'iiY :;i 



Genkhai, Stkatkjkaimiii Kki.ations 44 



Cretaceous 4-, 



Eocene 4(; 



Neocene 47 



Pleistocene 48 



DisTuinuTioN OF Stkata 4'.) 



Deiinvivie 4'.( 



Maryland oO 



Virginia 51 



General Chauacteu of the Deposits 52 



Composition 52 



Strilce and Dip 53 



Tliiclcness 54 



Okigin of the Materials 54 



Origin of Greensand 55 



Depth of Sedimentation 57 



Stratigraphical and Paleontological Characteristics 57 



Formations and Faunal Stages oS 



The Aquia Formation or Stage 59 



The Piscataway Member or Substage 60 



The Paspotansa Member or Snbstage 02 



The Nanjemoy Formation or Stage 64 



The Potapaco ^Member or Snbstage 65 



The Woodstock Member or Snbstage 66 



Local Sections 67 



The Potomac River Section 67 



Other Sections 71 



Geological and Geographical Distribution of Species 73 



Table showing Distribution of Maryland Eocene species 73 



Correlation of Deposits 82 



Correlation of the Deposits within the Middle Atlantic Slope 82 



Correlation of the Deposits with the Eocene Formations of the Gulf States. 83 



Paleontological Criteria 84 



Geological Criteria 89 



European Equivalents 91 



