20 PHYSIOGRAPHY A^^D GEOLOGY OF THE COASTAL PLAIN PROVINCE. 



A very good account of the Cape Henry sand hills is given. From the description it is 

 evident that the sand dunes have changed very little during the past hundred years, 

 although Latrobe found that the growth and advance of the sand dunes had been compara- 

 tively rapid for some time previous to his observations. 



1809 



Latrobe, B. H. An account of the Freestone quarries on the Potomac 

 and Eappahannock rivers. Eead Feb. 10, 1807. 



Trans. Amer. Phil. Soc, vol. vi, pp. 283-293. Phila.. 1S09. 



The quarries of Potomac sandstone near the mouth of Aquia Creek and on the 

 Rappahannock River near Fredericksburg are described. Latrobe likened the deposits 

 to the sand dunes at Cape Henry and suggested a common origin for both deposits. He 

 supposed that at one time the Potomac sands were beach dunes which had been heaped 

 up by the wind. 



Maclure, William. Observations on the Geology of the United States, 

 explanatory of a Geological Map. Eead Jan. 20. 1S09. 



Trans. Amer. PhiL Soc, voL vi, pp. 411-428, map. Phila., 1809. Republisneil 

 with additions in 1817 and 1818. 



A general account of the geology of the United States in which the limits of the 

 Atlantic Coastal Plain are roughly defined and the Coastal Plain deposits briefly described 

 under the title of the "Alluvial Formation."' 



1818 



Mitchell, Samuel L. Observations on the Geology of Xorth America, 

 illustrated by the description of various organic remains found in that 

 part of the world. 



Cuvier's Essay on the Theory of the Earth, pp. 319-424, 3 pis., New York, 1818 

 Mention is made of vertebrate bones and teeth found in Richmond of the ribs and 

 vertebrae of a whale found near Williamsburg in 1S02, and the remains of a mammoth 

 found in 1811 on the York River about 6 miles east of Williamsburg. The Richmond 

 fossils were probably from the Aquia. the Williamsburg ones from the St. Mary's or 

 Yorktowu. and tlie bont's of the mammoth from the Talbot. 



1824 



Finch^ John. Geological Essay on the Tertiary Formations in 

 America. Eead before the Acad, of Nat. Sci. at Phila., July 15. 1823. 



Amer. Jour. Sci.. vol. vii, pp. 31-43, New Haven, 1824. 



In this article the writer objects to the term "Alluvial" being used to include all 

 the Coastal Plain formations and advocates the separation of the Tertiary formations 

 from the alluvial beds. He correlates the fossiliferous beds at Richmond (Eocene?) and 

 Williamsburg (Miocene) with the London Clay. 



1826 



Pierce, James. Practical remarks on the shell marl region of the 

 eastern parts of Virginia and Maryland, and upon the bituminous coal 

 formation in Virginia and the contiguous region. 



Amer. Jour. Sci., vol. ii, pp. 54-59, New Haven, 1826. 



