CORRELATION WITH THE RATON SECTION 611 



volume of data was obtained which is not yet ready for publication. 

 Great numbers of fossil plants were collected from both coal-bearing 

 formations, and a special study of them is being made by F. II. Knowl- 

 ton. Although his study is not complete, it has progressed so far that he 

 feels justified in stating definitely that the plants from the two forma- 

 tions constitute two distinct floras; that the upper one is post-Laramie 

 in age, and that the lower one, formerly (111) called '^Laramie or 

 older (?),'' is clearly Montana and older than recognized Laramie. In- 

 asmuch as the study of these floras is incomplete, it is thought best to 

 withhold the lists of species. The rock formations of this field and their 

 relations to each other are shown in the following section : 



Generalized Section of Roclcs in the Raton Coal Field, New Mexico 



Feet 



Sandstone and shale, conglomeratic at the base, coal-bearinj;, con- 

 taining fossil plants of post-Laramie age 1,G00± 



(Unconformity.) 



Sandstone and shale, coal-bearing, containing fossil plants which 

 Knowlton regards as older than Laramie 0-475 



Sandstone (Trinidad) containing Anomial sp. ; fish bones ; Halymenites 

 major Lesq. ; Inoccramus haraltini Morton; Inoccramus f^agensis 

 Owen; Inoccramus sp. ; Lcgumcn? sp. ; Mactra warrenana M. and 

 H. ; Mactral sp. ; Mytilusi sp. ; Panopwa'i sp. ; TeUina scitula M. and 

 H. ; Tellina sp 100± 



Shale with concretions and thin layers of limestone. Near the top the 

 shale contains the following Pierre fossils : Ancyloceras sp. ; Ani- 

 somyon? sp. ; Anomia sp. ; Area sp. ; Avicula sp. ; Baculites oimtus 

 Say; Baculites comprcssus Say; CrassatcUitcs cimarroncnsis White; 

 Fasciolaria (Piestochilus) sp- ; Fasciolaria sp. ; Heteroccras chcy- 

 ensis M. and H. ; Hetcroceras sp. ; Inoccramus harabinl Morton ; 

 Inoccramus ohlonoiis Meek; Inoccrainiis sagcnsis Owen; Inoccramus 

 vanuxemi M. and H. ; Inoccramus sp. ; Lcda sp. ; Lima sp. ; Liopisfha 

 (Cymella) undata M. and H. ; Lucina occidcntalis (Morton)?; 

 Lucina sp. ; Lunatia sp. ; Mactra sp. ; Martcsial sp. ; Mosasanr 

 bones; Nautilus dckayi Morton; Nemodon sp. ; Odontotasis 1 sp. ; 

 Ostrea patina M. and H. ; Ostrea sp. ; Placenticcras intcrcalare M. 

 and H, ; Placenticcras ivhitfieldi Hyatt?; Placenticcras sp. ; Pty- 

 choceras sp. ; Pyiifususf sp. ; Scaphites nodosus Owen; Scaphitcs 

 sp. ; Syncycloncma sp. The lower part of the shale contains Benton 

 and Niobrara fossils. The following were collected in the Raton 

 field: Baculites asper Morton; Coilopoccras novimcxicanum Hyatt; 

 Inoceramus dimidius White; Inoccramus fragilis H. and M.?; In- 

 occramus lahiatus Schlotheim ; Inoceramus sp. ; Ostrea luguhris 

 Conrad ; Ostrea sp. ; Prionocyclus icyomingensis Meek ; Scaphitcs 

 ventricosus M. and H 8.000± 



Sandstone (Dakota). 



Total 5,175 



