Fossiiisation. 7G 



Clark. Mathews [et alii]. Report on 

 the physical features of Maryland, to- 

 gether with an account of the exhibits 

 of Maryland mineral resources made by 

 the Maryland geological survey. 

 (Special Publication, Volume VI, Parts 

 1 and II.) Baltimore, 1906. 



Cockerel! ."i474. Florissant ; a Mio- 

 cene Pompeii. 



Collier. 5480. The Arkansas coal- 

 field. 



Gaudry. 5007 

 arctica. 



Patagonia and Ant- 



0220 



The Meso-Silurian 



Frouty. 6007. 

 deposits of Maryland 



Spencer. 6138. [Replacement of 

 bones by zinc and lead minerals.] 



Sternberg- 6161. My expedition to 

 the Kansas chalk for 1907. 



Udden. 6198. Fossil tracks in the 

 Del Rio clay. 



Walcott. 6222. Cambrian sections 

 of the Cordilleran area. 



Wilson. 6259. A travertine deposit 

 in Tippecanoe county, Indiana. 



