PARTING QUARTZITE SERIES. | 
posed to be lacking. The Devonian beds of the Kanab Valley, however, 
as described by Mr. C. D. Walcott,’ correspond closely with the Parting 
Quartzite series in nearly every detail, and afford very strong grounds 
for correlation. The Kanab Valley lies in southern Utah and northern 
Arizona, about 300 miles southwest of the Aspen district. Mr. Walcott 
describes the Devonian here as follows: 
The Devonian beds are very variable in character,.and of little vertical 
range. At their greatest development, when increased by being deposited in a 
hollow of the limestone beneath, there is but 100 feet of purple and cream-colored 
limestone and sandstone, passing into gray calciferous sandstone above. Over the 
knolls of Silurian limestone the upper beds alone extend with a thickness of from 
10 to 30 feet. The purple sandstones deposited in the hollows of the Silurian lime- 
stone are characterized by the presence of placoganoid fishes of a Devonian type. 
The Silurian limestone was extensively eroded antecedent to the deposition of the 
superjacent Devonian beds. 
With very slight modifications this might be taken as a description of 
the Parting Quartzite series at Aspen. The ‘purple and cream-colored 
limestone and sandstone, passing into gray calciferous sandstone above” 
describes the deep-colored sandstones and shaly dolomites of Aspen, which 
pass upward into the heavier upper sandstone and quartzite. The evidence 
of the erosion interval between these beds and the underlying dolomites is 
also important in the correlation. At one locality in Aspen, on the side of 
East Aspen Mountain, overlooking the town, scales and teeth of fishes 
were found in the shaly beds directly overlying the dolomites. These fossils. 
were examined by Dr. George H. Girty, who made the following report: 
The vertebrate fossils are fish remains, and evidently come from a bone bed. 
They consist of dissociated and fragmentary plates and bones, together with one 
tooth and a cast of another. As far as I have been able to ascertain, the latter 
belong to the sauroid fishes, and probably may be referred to the genus Rhizodus, 
Owen, or perhaps to the allied genus, EKusthenopteron. Rhizodus itself, in this 
country, occurs in the Carboniferous, both Upper and Lower, while Eusthenopteron 
is found in the Upper Devonian. 
In the Kanab Valley section the sandstones and impure limestones of 
the Devonian are underlain by 185 feet of massive mottled limestone, with 
50 feet of sandstone at the base, constituting the Silurian series, and are 
overlain by 735 feet of massive Carboniferous limestone, with arenaceous 
and cherty limestone above, passing upward into friable red Carboniferous 
‘Am. Jour. Sci., Sept., 1880, 3d series, Vol. XX, p. 224. 
