INTERIOR VALLEYS. 419 



ridges on either side of 4 miles. In crossing from Huntsville to Mountain 

 Green, but few outcrops are visible along the road, the hills being round 

 and smooth, and covered with soil and vegetation. The rocks are chiefly 

 sandstone, showing considerable variety in color and texture. The upper 

 beds are in general more friable, possessing a reddish tint, many of them 

 being fine conglomerates. The lower beds, though varying in physical 

 habit, are much more compact, presenting under the hammer a decided 

 tendency to conehoidal fracture, and similar' to quartzose rocks which have 

 a finely crystalline or amorphous base. Under the microscope, thin sec- 

 tions reveal the presence of fragments of triclinic feldspar, hornblende, and 

 mica, and a few dark grains, which are probably magnetite. Many of the 

 beds resemble in lithological habit the compact gray sandstones, which are 

 so characteristic of the Cretaceous rocks in the region of the Wahsatch. 

 The entire series of beds, however, the upper members of which also occur 

 in Morgan Valley, have been referred to the Vermillion Creek formation. 



