72 



THE EOCEXE DEPOSITS OE MAKTLAXD 



, Section eaut of bridge at Upper Jfarlfjoro, Frlo.ce George' n County. 



.;._ f Feet. 



2 I Glauconitic clay 22 



Z_ 'j Pink clav, without jrlaucouite or fossils 22 



i I 



^ 



Eocene. 



C Coarse glauconitic sand 32 



Shell marl with Gihhula glawlula^ FisHuridea marlboroeriHiH, 

 Lucina aquiarux^ iJiplffdonta marlboroenHiis, Venericard'ta jAart- 

 icoHta v'lr. reyUi., Pteria, lirnula, Cijjcvllaea gigantea, Leda 



jjo.riUif, Xucula ovula f ^ 3 



Indurated ledge with Turritella mortord, T. hurfterona, Menalia ■ 

 ohrv.ta, Co.lyptro.phorv.is jackisoni, Panojiea elongata, Meretrix 

 ovo.to, var. pjygo. Jjoainiopiiii lentu-ularix, Venericardia plani- 

 coita var. regia, CraiHO.telUtes alaeformiH, Antarle maryland- 

 ica., Glycymeris idoneuH, CucvMaea gigantea, Leda pariUa, 



Nucula ovvla 



Glauconitic sand full of fine fragments of shells accompanied 

 by tanozoa, echinoid spines aud foraminifera ; and with 

 Ontrea comprreHHiroistra, GrypTiaeoHtrea vomer, and Plo.tidia 

 raarylawlica. (Known as Bryozoan sandj 5 



Total 88 



Neocene. 



Eocene. 



Section in ravine one niile Houth of Thrift, Pririce George'' a County. 



Feet. 



Lead-colored clay with Miocene fossils 40 



C Dark argillaceous greensand 7 



I Argillaceous greensand,packed with Venericardia pio- 



1 tapo.f:oenxiis 1 



Dark glauconitic clay 3 



Layer of Venericardia jiotapjacoerusin 



Greensand with many scattered specimens of Ven.er- 



icardio, pqtapae'jewiiH 3 



Line of concretions 



Glauconitic clay with Venericardia polapacoensis 4 



Dark greensand 5 



Layer packed with shells of Venericardia potapacoenxis 1 



Argillaceous greensand 1 



Line of concretions 



Argillaceous greensand 3 



Greensand with Venericardia potaparoenmH 1 



Dark glauconitic clay 3 



Layer of shells of Venericardia potapacoermiH 



I Dark clay, with much glaaconite — 



Inches. 



Total. 



6 



Sectiori, on hank of Patur.ent Tiiver one-quarter mile below oiouth of Lyona Creek, 



Calvert County. j.^^^ ^^^^^ 



Sand and gravel 6 



C Diatomaceous clay 9 



J Siliceous indurated stratum with Miocene fossils . . 10 



] Brown gritty clay, with abundant casts of Miocene 

 I fossils 4 



Pleistocene. 



Neocene. 



Eocene. 



i . ( Argillaceous greensand, with abundant casts of 



'=' 5* J Nanjemoy fossils 10 



^ S / Line of concretions 



Argillaceous greensand and talus 20 



Total r,(i 



