Elizabeth Anne VanderPutten - The Jemez Country


 

September 18, 1999

 
West of Bandelier National Monument lies the Jemez Country, an area that encompasses everything from Los Alamos to San Ysidro. Included are such well know names as Jemez Wilderness, Jemez Mountains, Jemez River, Red Rock Canyon, Sulphur Springs, Battleship Rock, Jemez Canyon and Jemez Springs -- plus hundreds of thousands of acres of forest and Valle Grande, this country's largest caldera.

Pictured above is Valle Grande, which looks like a great mountain valley where John Ford might be filming one of his classic westerns. This was taken at stop number 4 on our Jemez Country trip map. For a large (97k) aerial view of the Jemez Country click here.


     

Valle Grande Overlook Highway Sign

Valle Grande, which appears to be a valley, is actually a caldera, which is the Spanish word for kettle. A caldera is a collapsed volcano. To geologists, Valle Grande is known as Valles Caldera.

A million years ago, the area that is now the Jemez Country was filled with active volcanoes. The Jemez Volcano erupted so much material that a void was created under the overlying rock surface. With its support gone, the surface collapsed. As the central surface collapsed, vents opened around the edges and more eruptions occurred.

Most of the collapsed area filled in with ashes, lava, tuff and other material from the eruptions.

This sign is at Stop 3 on our Jemez Country trip map.

 


September 18, 1999

     

September 18, 1999
 

NE View of Valle Grande from Overlook

Valle Grande is this country's greatest calderas and one of the largest in the world. In 2000 it became the Valles Caldera National Preserve.

Valles Caldera is 17 miles in diameter. In the center is a giant "blister," Redondo Peak, which is one kilometer (0.6 miles) above the caldera or valley floor. Because of Redondo Peak, the entire valley cannot be seen from any one point.

This is the view looking northeast from the roadside Overlook at Stop 3 on our Jemez Country trip map.

     

NW View of Valle Grande from Overlook

This is the view looking northwest from the Overlook at Stop 3 on our Jemez Country trip map.

Calderas differ from craters in that crater are the result of the impact of an asteroid, while caldera are the result of volcanic activity. Crater Lake in Oregon is actually a caldera.

 


September 18, 1999

     


U.S. Department of Agriculture

 

Jemez Mountains

The Jemez Mountains are a volcanic field that were active as recently as 130,000 years ago. Some geologists think that, based on the long history of the Jemez volcanic field and past cycles in activity, it probably should be considered a dormant volcano that will probably erupt again.

Click here for a large (97k) aerial view of the Jemez Country, including Los Alamos, Valle Grande (Valles Caldera) and the Jemez Mountains.

     

Jemez River Canyon

 


U.S. Department of Agriculture

     


September 18, 1999

 

Battleship Rock

Fifteen miles north of Jemez Falls on Route 4 sits Battleship Rock, which was formed during the last eruptions of the Jemez Volcano. There is a picnic area there, as well as the trail head for McCauley Hot Springs. YMCA Camp Shaver is located nearby.

There are at least two stories about how Battleship Rock got its name. One is that, like the prow of a battleship, Battleship Rock is the point where the East and West Forks join to become the Jemez River. The other explanation is that it looks like a battleship.

     

Jemez Canyon Near Sundown

The Jemez Country, like Sedona, Arizona, is known for its red rock formations.

This sign is at Stop 5 on our Jemez Country trip map.

 


September 18, 1999

     

Email: Elizabeth Anne VanderPutten