Tuff Schist

The adventures of an unstable geologist

Posts tagged landscape

101 notes

geologise:

Sandstone Cross-bedding by ZionNPS on Flickr


The cross-bedding found in the Navajo Sandstone is the result of sand being moved by wind. As the sand dunes, which were once found in this ancient desert, were blown by prevailing winds, the sand tumbled down and collected on the dune face. As wind patterns would change, so would the direction of the bedding. With more layers accumulating with this constant dune migration, the deposits were continuously buried. In time, these deposits were solidified in place by mineral rich ground water. NPS Photo

geologise:

Sandstone Cross-bedding by ZionNPS on Flickr

The cross-bedding found in the Navajo Sandstone is the result of sand being moved by wind. As the sand dunes, which were once found in this ancient desert, were blown by prevailing winds, the sand tumbled down and collected on the dune face. As wind patterns would change, so would the direction of the bedding. With more layers accumulating with this constant dune migration, the deposits were continuously buried. In time, these deposits were solidified in place by mineral rich ground water. NPS Photo

Filed under Utah geology landscape sandstone science

11 notes

arizonanature:

National Parks: Day Ten
Sunset Crater Volcano National Monument
Sunset Crater Volcano! Roughly 900 years ago, the eruption of this volcano reshaped the surrounding landscape, forever changing the lives of people, plants and animals. Hike the trail through the lava flow and cinders and you’ll likely discover colorful, ruggedly dramatic geological features coexisting with twisted Ponderosa Pines and an amazing array of wildlife.

arizonanature:

National Parks: Day Ten

Sunset Crater Volcano National Monument

Sunset Crater Volcano! Roughly 900 years ago, the eruption of this volcano reshaped the surrounding landscape, forever changing the lives of people, plants and animals. Hike the trail through the lava flow and cinders and you’ll likely discover colorful, ruggedly dramatic geological features coexisting with twisted Ponderosa Pines and an amazing array of wildlife.

Filed under geology sunset crater volcano volcanic nature landscape mountains arizona flagstaff national park beautiful lava trees