274 HOWE & CROSS GLACIAL PHENOMENA, SAN JUAN MOUNTAINS 



Plate 28. — Looking North up the Animas Valley 



The view is from a point about 10 miles south of Durango. The broad terrace 

 covered by the gravels of the last valley train is shown to the right ; above 

 it is the western part of the Florida mesa, a corresponding level being shown 

 to the left. The hills in the distance consist of upturned cretaceous rocks 

 directly south of Durango. 



Plate 29. — Looking South doion the Animas River 



The view is from a point about 8 miles below Durango. The lowest terrace 

 and Florida mesa are shown on the left, while in the distance still higher 

 gravel-covered terraces are shown. 



Plate 30. — Terminal Moraines of the Animas 



The view is from the west and shows the two moraines near the middle of 

 the picture beyond the east bank of the river. The higher gravels of the 

 Florida mesa level occur on the prominent bench to the right between the 

 moraines and the high ridge forming the skyline; the southward extension 

 of this terrace is shown in plate 31. The old town of Animas City is in the 

 foreground. 



Plate 31. — Looking Southeast across the Animas Valley 



The view is from a hill above Animas City. The two moraines are shown on 

 the left, with the terraces covered with outwash gravels beyond them. The 

 level of the prominent terrace above the lower ones is the same as that of 

 Florida mesa, shown some miles below in plates 28 and 29. The site of 

 Durango appears at the extreme right. 



