144 PHYSIOGRAPHY AND GEOLOGY OF THE COASTAL PLAIN PROVINCE. 



Just above Bayport Wharf there is a well exposed cliff about 90 to 100 

 feet high, showing essentially the same kinds of materials given in preced- 

 ing section, with the exception of the fossiliferous bed which is wanting. 

 The same prominent laminated clay layer is present but has perhaps dipped 

 a few feet lower than in the section described above. 



II. Section right tank of Rappahannock River one-half mile below 



Bayport. 



Feet 

 Pleistocene Loam grading into sand and gravel . . . .about 15 



Miocene. St. Mary's Greenish-gray sand mottled with yellow .. about 15 



Total 30 



III. Section right hanJc of Rappahannock River, one-half mile above Punch 



Feet 

 Boiul Point, and about two and one-half miles below Bayport. 

 Pleistocene Loam grading down into drab clay with a thin 



band of pebbles at base 11 



Miocene. St. Mary's Greenish-gray argillaceous sand with many fos- 

 sils, slightly indurated in places near top, 

 the cement being iron oxide. Most numer- 

 ous species are Melina maxillata, Area cen- 

 teneria, and Vermetus virginicus 6 



Total 17 



The exposure with essentially the same strata extends for about 200 

 yards along the shore. 'The most abundant .species of fossils are Melina 

 maxillata, Area centenaria, Vermetus virginicus, Ostrea, Turritella variabil- 

 is, Fanopea goldfussi, Crassatellites turgidulus (?), Area staminea, Pecten 

 madisonius, Ecphora quadricostata, Chione latilirata, Disainisca luqubris^ 

 Anomia aculeata. 



IV. Section right tank of Rappahannock River at Waterview Wharf. 



Feet 

 Pleistocene Sand, clay and loam 12 



Miocene. St. Mary's Greenish-gray sand. An undulating, slightly 



rusty layer occurs about 3 feet above base 

 containing casts of Miocene shells in a poor 

 state of preservation. In places some of the 

 calcium carbonate remains 6 



Total 18 



Along the shores of TJrbanna Creek and in the bluff along the river 

 between Urbanna Creek and Kelson's Wharf in West TJrbanna the St. Mary'a 

 Miocene is exposed. It consists of a buff to gray sand in which there is a 

 bed of shell marl containing a wide variety of molluscan species. The bank 



