A COAL-MEASURE FOREST 



243 



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one just described. The section figured (Fig. 2) is a mile or more north 



of the spring, but has a similar double character. It is impossible 



to be certain that the disturbance is due to a 



double appressed fold separated by faults, but 



such is the appearance. At this locality the 



western side of the break is also exposed, and 



is a distinct fault, with much alteration and 



excretion of quartz. A curious quartz breccia 



is a feature of the fault on the western side. '^> 



The upper Coal Measures or Permo-Carbonifer- "^'^'v^-'; 



ous appears on the west, and about half a mile ^^' 



west of the fault we found fossils including 



Phillipsia major and other types known to be 



well up in the series. 



Unfortunately, the paleontology of the Sandia 

 series is too little known at present to enable 

 us to locate it definitely with respect to the 

 divisions now recognized in the Middle West. 

 We have determined in it, immediately above 

 the fire clay beds, Productus costatus, Spirifer 

 earner atus, Amhocoelia planoconvexa, Seminula 

 argentea (small form), Derbia crassa (?), 

 bryozoa, etc. In the lower part of the division 

 immediately following the Sandia beds there is 

 a large fauna, of which the following may be 

 mentioned: Eupachycrinus verrucosus, Reticu- 

 laria lineatus, Amhocoelia planoconvexus, Spirifer 

 striatus, Spirifer cameratus, Pro- 

 ductus cora, Productus nebracen- 

 sis, P. semireticulatus, Seminula 

 argentea (large form), Derbia 

 crassa , Chonetes granulifera , 

 Dielasma bovidens (rare at this 

 horizon, abundant higher up), 

 Streblopteria ( ?). It may be 

 noted that Eupachycrinus is known in the Kansas section from 

 the Earlton to the Severly, Chonetes granulifera commences in the 



^ I.ter.»X Ij^f^'^^" 



