396 GEOLOGY OF THE DENVER BASIN. 



top of the Trias and at approximately the same horizon as the Manitou 

 stone. The dip is east 30°, the strike with the trend of the range, nearly 

 north. The beds form a bold outcrop to the west, 100 feet in height, the 

 quarry being opened on their backs. The stone is weathered to a depth 

 rarely greater than 3 to 6 feet. 



stout and vicinity. — The quarries at Stout and in its vicinity are opened in 

 the upper portion of the homologue of the Creamy sandstone and extend 

 at intervals along the trend of the ridge for 3 or 4 miles. The dip of the 

 beds is 30° to 45° E. Compression has altered the original sandstone 

 to hard qnartzite, a resistance to crushing as high as 12,000 pounds to the 

 square inch being attained. The rock is more distinctly and finely 

 laminated and lies in much thinner beds than the normal white sandstone. 

 The lifts of the stone as at present quarried vary in thickness from 1 to 

 2 J feet, and are in area 8 by 12 and 15 feet The direction of the grain is 

 definitely marked, rendering quarrying easy. End joints are usually 

 present. The rock is normally a variable white, but is occasionally tinted 

 a faint red. It is usually dotted with small spots of the hydrated oxide of 

 iron, a characteristic of this horizon throughout the foothill region. 



The stone is extensively employed in sidewalk construction, particu- 

 larly in business portions of the city, where constant wear and possible 

 weights demand great resistance and strength. For paving and curbing 

 purposes it is dressed at the quarry into blocks of the required size, and 

 its market in this product extends to the Missouri River. It is considered 

 too hard for general building purposes, being used only for foundations 

 and an occasional sill or cap. 



Arkins. — The Arkins stone is said to be identical with the Stout, but a 

 visit to these quarries was not made. They are located on the Buckhorn, 

 in the synclinal half of the echelon fold immediately north of Big Thomp- 

 son Creek. They are reached by a branch of the Union Pacific, Denver 

 and Gulf Railroad from Loveland, about 8 miles in length. 



Lyons. — Lvoiis and its quarries lie in the foothills, 12 miles west of 

 Longmont, at the terminus of the Denver, Longmont and Lyons branch 

 of the Burlington route. This, also, is a region of folding, and in conse- 

 quence the strata have been subjected to considerable compression, resulting 



