198 • KANSAS CITY REVIEW OF SCIENCE. 



route would cross the Laramie River three miles further up stream. By the 

 former route Ave would pass through fifteen to eighteen miles of good pineries, 

 (the Finns Contorid) across the Medicine Bow Mountains and six miles further to 

 Berry's at the entrance to North Park. Following the road by the Upper Ford 

 we pass over a well-worn road through more open woods. On this route the 

 stratified rocks present a fine section as we leave the plains, of which the follow- 

 ing is an approximation : 



1. 200 feet of white beds crowning the hill-top. 



2. I GOO feet of red beds. 



3. 36 feet of white gypsum with occasional crystallized laminse. 



4. 100 feet of yellow beds. 



5. 100 feet of red and grayish beds. 



The gypsum beds above named would be exceedingly valuable if nearer 

 market. 



Our route across the Medicine Bow Mountains is at an elevation of probably 

 8000 to 9000 feet above the sea, and of easy grade. The prevailing rock is a 

 red granite, sometimes schistose and sometimes graphic, but on a part of the 

 route is very much decomposed and at one place tliere is apparently a broad vein 

 of white quartz. The approach to North Park is by a long sloping valley, along 

 which flows a clear stream. At the entrance to the North Park is a gray banded 

 gneiss traversed by occasional quartz veins. These rocks are seen for three miles 

 along the valley from the granite of the mountains to North Park. 



North Park is about fifty miles north and south, by thirty miles wide, east and 

 •west, and entirely surrounded by mountains. Southwardly over the Park we 

 •cross several good-sized clear streams of water, including the Canadian, Michigan 

 and Jack's Creeks. Illinois Creek lies just west of the last and they all are con- 

 fluents of the North Platte, which stream they join in the northern portion of the 

 Park near Independence Mountain. 



The exposed rocks in North Park are chiefly stratified sandstone and shales 

 -of recent age, probably none are older than the cretaceous. Owl Mountain is a 

 high ridge of chiefly such rocks, projecting northwestwardly into the Park from 

 the east and resting against the igneous rocks in the rear. 



The Medicine Bow Mountains extend from about 100 miles north, passing 

 southwest for one-half their extent, then trending nearly south to a point east of 

 Teller City (the chief mining town located at the southeast corner of North Park) 

 where they connect with the "Continental Divide " which trends off west to- 

 ward Muddy Pass, forming the southern rim of the Park. They then pass off 

 northwardly forming its western rim. 



Spurs of these Mountains approach the North Fork of Platte River, north of 

 the Park, and the Medicine Bow range approaches it on the east. 



The Park is about fifty miles long thirty wide, and, according to Clarence 

 King, has an average elevation of 8,500 feet above the sea. It is nearly surround- 



