RECAPITULATION OF PALEOZOIC FORMATIONS. 153 



limestone, though the lowei' part resembles the Cambrian beds of Manitou Park. 

 Lee found a series of chertj- limestones interstratified with red claj^, in which were 

 found DahnaneUa testudinarla and other fossils obscurely preserved, indicating 

 Ordovician time. This occurrence is south of Perr}^ Park and the Ordovician there 

 rests upon a deep red quartzite supposed to be Cambrian. A similar bed exists in 

 the southern part of Perry Park, where it is represented on the map as resting upon 

 the pre-Cambrian and as being overlaid by Red Beds. No fossils were found at this 

 point. These beds appear to be missing in the exposures on Plum Creek, according 

 to both Peale and Lee. The horizon of this formation in the Plum Creek section 

 should be below the Mississippian limestone and above the sandstones which underlie 

 it, if the latter are, as I have suggested, Cambrian. To explain what now appear 

 to be the facts of distribution of these formations requires an overlap of the Ordo- 

 vician upon the Archeau, and an erosion period followed by an overlap of the Missis- 

 sippian upon the Cambrian. 



Peale also made a section through Glen Erie, near Colorado Springs." The 

 sandstones at the base probably belong to the Cambrian. Peale refers them to the 

 Potsdam, and the beds just above to the Quebec group. The latter, ascending, is as 



follows: 



Section tliruiiijli- Glen Erie. 



Feet. 

 13. Red shaly limestone with fragments of fossils (Silurian) 4 



12. Limestone with interlaminated shale 7 



11. Red limestone with flint nodnles 7 



10. Red limestone 2 



9. Red shaly limestone. 1 



8. Red limestone ^. 1 



7. Irregularl}' laminated limestone 5 



6. Red and greenish limestone 5 



These, I belie\-e, can all bo safely referred to the Manitou limestone, together 

 with part of the bed following, No. 14, consisting of 279 feet of gray, purplish, and 

 yellow limestone. The upper portion at least represents the Millsap formation. 

 The Ordovician beds here also appear to belong to the Manitou limestone. 



The Paleozoic outcrops of Garden Park in the southern part of the Pikes Peak 

 quadrangle connect with those about Canyon. The section in Garden Park contains 

 both the Manitou limestone, the Harding sandstone, and the Fremont limestone, 

 whose description, abbreviated from the Pikes Peak folio, has already been given. 

 The geologic section at Harding's quarr}^ near Canyon was described by C. D. 

 Walcott, and it is from this series that the names Harding sandstone and Fremont 

 limestone were adopted bj' Cross. The Cambrian is apparently lacking in this 

 section, the Harding resting directlj^ on the Algonkian. The Harding sandstone, 

 with a thickness of 86 feet, consists of gray, reddish, and purplish-brown sandstones 



U. S. Geol. Geog. Surv. Terr., [Seventh] Ann. Rept,, for 1873, p. 201. 



