RECENT. 



109 



Virginia line. Indications of such a division of the Talbot can be observed 

 in a few places in A^irginia but are not distinct enough to be mapped. 

 Unlike conditions in the two adjoining regions give evidence of the differ- 

 ential movements that took place during the uplifts and submergences of 

 the Pleistocene. 



Table of Pleistocene Formations. 



Recent. 



The recent deposits consist of beaches, sand bars, sand spits, sand 

 dunes, flood plains and other fluviatile deposits, and humus. These deposits 

 represent the results of all the geological agencies now at work in modify- 

 ing the surface of the Coastal plain, and are variously developed in the 

 different portions of the region, dependent on the character of the adjacent 

 formations and the distribution of the various streams and currents. A 

 great Eecent terrace, similar in all particulars to those of Pleistocene 

 date, is now being laid down beneath the bed of the present sea and estuaries 

 and along the border of the coast and tidal streams. Beaches are frequently 

 being formed, while great sand bars are common. Sand dunes adjoin the 

 coast, and are especially prominent in southern Virginia and North Caro- 

 lina, where from Cape Henry southward they are a conspicuous feature of 

 the coastal topography. The rivers during flood are constructing flood 

 plains, which coalesce with the deposits of the estuaries. Over the land sur- 

 face the transfer of material and the development of soils, with their 

 accompanying humus, are going on everywhere. 



14 



