Ads
related to: geology of the grand canyon areaabebooks.com has been visited by 10K+ users in the past month
visitacity.com has been visited by 100K+ users in the past month
Search results
Results from the WOW.Com Content Network
The resulting Grand Canyon Supergroup of sedimentary units is composed of nine varied geologic formations that were laid down from 1.2 billion and 740 million years ago in this sea. [11] Good exposures of the supergroup can be seen in eastern Grand Canyon in the Inner Gorge and from Desert View, Lipan Point and Moran point. [12] [note 1]
A geologic cross section of the Grand Canyon. [ 4 ] The Unkar Group is a sequence of strata of Proterozoic age that are subdivided into five geologic formations and exposed within the Grand Canyon , Arizona , Southwestern United States .
The Grand Canyon is part of the Colorado River basin, which has developed over the past 70 million years. [7] [20] For more than 150 years, scientists have gathered data, proposed new ideas, and debated sometimes contentious theories about the geologic origins of the Grand Canyon and the Colorado River. Formation of the Grand Canyon and the ...
The oldest exposed formation in Zion National Park is the youngest exposed formation in the Grand Canyon – the ~240‑million-year-old Kaibab Limestone. The Bryce Canyon area to the northeast continues where the Zion area leaves off by presenting Cenozoic-aged rocks that are 100 million years younger
The Uinkaret volcanic field is an area of monogenetic volcanoes in northwestern Arizona, United States, located on the north rim of the Grand Canyon. [2] Lava flows from the Uinkaret volcanic field that have cascaded down into the Grand Canyon, damming the Colorado River, have been used to date the canyon's carving. [3]
Fossil trilobites from Bright Angel Shale. Image courtesy of Grand Canyon National Park. Within the Grand Canyon, the Bright Angel Shale is the most fossiliferous of the five formations that comprise the Tonto Group. It contains a variety of body fossils and is rich in trace fossils. Overall, when compared with other Middle Cambrian formations ...
Figure 1. A geologic cross section of the Grand Canyon. [5]The Tonto Group is a name for an assemblage of related sedimentary strata, collectively known by geologists as a Group, that comprises the basal sequence Paleozoic strata exposed in the sides of the Grand Canyon.
The Neoproterozoic Chuar Group consists of 1,600 m (5,200 ft) of exceptionally well-preserved, unmetamorphosed sedimentary strata that is composed of about 85% mudrock.The Group is the approximate upper half of the Grand Canyon Supergroup, overlain by the thin, in comparison, Sixtymile Formation, the top member of the multi-membered Grand Canyon Supergroup.
Ads
related to: geology of the grand canyon areaabebooks.com has been visited by 10K+ users in the past month
visitacity.com has been visited by 100K+ users in the past month