392 R. C0. Hills—Ezxtinet Glaciers of Colorado. 
A short distance down the valley from the Falls the ice stream 
was divided, one portion entering the Rio Grande Valley at 
Antelope Park and the other portion at Antelope Springs, three 
miles to the eastward. The latter branch formed the depression 
known as Santa Maria Lake, and, during its retreat, the huge 
termina! moraine one mile above the springs. 
rom the Continental Divide at the head of the Rio Grande 
leaving an irregular line of escarpments and low hills facing | 
the Needle and La Plata Mountains. These escarpments are 
especially noticeable between the Animas and Mancos ae 
where the depth of erosion from this cause alone is fro s 
to 500 feet. Similar escarpments occur fronting the Mast: : 
Wilson and Lone Cone groups of mountains. In the Animas 
ear 
foes 
