Geology and Geography

Arches To Sunset

As we bid farewell to Moab, UT, we followed US 191 into Arizona. This road is most famous for its trek through Monument Valley (Utah/Arizona border). Along the way, we visited Newspaper Rock, the Goosenecks of the San Juan State Reserve, and Mexican Hat.

Newspaper Rock is one of the most densely etched petroglyph panels in the American Southwest.

Newspaper Rock is one of the most densely etched petroglyph panels in the American Southwest.

 

Incised meanders of the San Juan River are spectacular at Goosenecks State Reserve in SE Utah.

Incised meanders of the San Juan River are spectacular at Goosenecks State Reserve in SE Utah.

 

Mexican Hat (foreground). Note the layers in the background and foreground are horizontal and those in between are dipping toward the photographer (to the west). This is a single fold known as a monocline.

Mexican Hat (foreground). Note the layers in the background and foreground are horizontal and those in between are dipping toward the photographer (to the west). This is a single fold known as a monocline.

 

In Monument Valley, spectacular buttes and mesas are visible as the more resistant Shinarump Conglomerate overlies shales of the Moenkopi Formation (both Triassic in age).

In Monument Valley, spectacular buttes and mesas are visible as the more resistant Shinarump Conglomerate overlies shales of the Moenkopi Formation (both Triassic in age).