152 CARBONIFEROUS FORMATIONS AND KAUNAS OK COLORADO. 



The l(i\v(M- part of llic scct'ion should prohahly Ik^ referred to the Cambrian, the 

 Manitou limestone embracinj;- l)ed.s H, i, and 5, which are succeeded bj' the sandstones 

 and oonu'lomoratos of the. Rod Beds. In sections -t and 5, on page 208. probal)ly only 

 the j)iiik limestone foi-miny- the hif>-hcst ))ed of the section should be referred to the 

 Manitou. In it were found an OrtJi!i< like (J. desmoplewa, £!tu)mphalun, Asaphm 

 {Megalasjns), Conocorn/jihe, Lingula, Bathyuriis, and Paradoxides, or Olenus. Peale 

 unites this with the bed 6, assigning- them, with a comt)ined thickness of about 60 feet, 

 to the Quebec group, but as the blood-red calcareous .sandstone (bed 0) is said to 

 contain L'mcjulepls and Oholm, it seems that it .should be united with the sti'ata below 

 which Peale calls the Potsdam. Another section (sec. (3, p. 208) was made on Trout 

 Creek. The lower portion was concealed, the exposures consisting altogether of beds 

 which jirobabl}' belong to the Manitou. These are from below upward: 



Section on Trout Creek. 



Feet. 

 6. Yellowish white limestone 20 



5. ilottled limestone 3 



4. Purplish sandstone | 



3. Red limestone I 



2. Light shady limestone 20 



1. Red limestone 26 



These give a combined thickness of 100 feet. The lowest limestone is f ossilifer- 

 ous, the fauna cited indicating Ordovician. Section 7 (p. 309) was made on a small 

 tributary' of Trout Creek. Though no fossils were found in this section, by analogy 

 with the sections 4 and 5, with which a close agreement exists, all the lower portion 

 belongs in the Cambrian, and only the 16 feet of pale pink and gray limestone (bed 7) 

 and the pink limestone above it belong in the Manitou limestone. 



The beds in Manitou Park were examined in connection with the geologic work 

 of the Leadville monograph. On page 62 of this work it is stated that Whitman 

 Cross obtained from a reddish brown sandstone, iS feet above the Archean, a species 

 of '"'' Lingidepis related to L. pinnceformis of the St. Croix sandstone of Wisconsin." 

 From red calcareous sandstone alternating with white limestone 106 to 122 feet above 

 the Archean, he obtained Glyptocystites{'() sp., Lingula sp., Orthis desmiopleura, 

 Metoptoina n. sp., CyrtoUtes s^., 07'thoceras s'p., and Hathyurus similUvius{1). The 

 Ordovician age of this fauna is not to be questioned. It is said to be essentially the 

 same as that of the upper third of the Pogonip limestone of Nevada. Lithologi- 

 cally the beds in which these fossils occur do not exactly agree with any one of the 

 varying sections described by Peale, but thej' are most similar to section 6. 



The geologic section in Perrj^ Park has been described b}" Peale and later by 

 W. T. Lee. In Peale's section '^' there appears to be no equivalent of the Manitou 



n u. S. Geol. Geog. Siirv. Terr., [Second] Ann. Eept., for 1875, p. 197. 



