13G MISSOURI BOTANICAL GARDEN 



that at the present time its contents are well studied. Among 

 the 800 or more pubHcations mentioned, in 1890, by Samp- 

 son * as deahng with the geological problems of Missouri, a 

 large percentage treat of paleontology only. A bibliography, 

 more ample and arranged according to a different system, 

 is given by Keyes,t since the publication of which a number 

 of others, dealing with St. Louis county, have appeared. 



am on 



Acad 



cmy of Science of St. Louis. 



For the geology of that part of Illinois considered in the 



present 



paper, the publications of the Geological Survey of 

 and those of the U. S. Geological Survey have been 



for 



by Weeks.! 



bibliographic refer- 



THE MISSOURI SECTION. 



p 



In this portion of our territory the Pleistocene, the Car- 



bonifcrous 



and Jura 



posed. Neocene^ Eocene, Cretaceous 



both 



are found in the Illinois 



measures 



as well as 



above 

 non of 



of the River des Peres. 

 coal field. 



An excellent idea of the formations, as occurring in St. 

 . Louis county, may be obtained from a general section pub- 



* Sampson, F. A. A Bibliography of tlie Geology of Missouri. Geo- 

 logical Survey of Missouri. Arthur Winslow, State Geologist. Bulletin 



2 : 5. 1890. 



t Kcyes, C. R. Bibliography of Missouri Geology. Missouri Geo- 

 logical Survey. Charles Kcyes, State Geologist. 10 : 219. 1896. 



t Weeks, F. B. Bibliography of North American Geology, Paleon- 

 tology, Petrology and Mineralogy for 1892-1900 inclusive. Bull. U. S. 

 Geol. Survey. ISS. 1902. — Index to North American Geology, Paleon- 

 tology, Petrology and Mineralogy for 1S92-1900, inclusive. Bull. U. S. 

 Geol. Survey. ISO. 1902. 



§ Gallaher, Jno. A. Preliminary Ileport on the structural and eco- 

 nomic Geology of Missouri. Missouri Geologic;il Survey. 13 : 167, 1900. 



