The Apache Group is a

Mesoproterozoic The Mesoproterozoic Era is a geologic era that occurred from . The Mesoproterozoic was the first era of Earth's history for which a fairly definitive geological record survives. Continents existed during the preceding era (the Paleoproterozoic ...

group of geologic formations in the southwestern

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 U.S. state, states, a Washington, D.C., federal district, five ma ...

. The Apache Group—or some underlying

Vishnu Basement Rocks The Vishnu Basement Rocks is the name recommended for all Early Proterozoic crystalline rocks (metamorphic and igneous) exposed in the Grand Canyon region. They form the crystalline basement rocks that underlie the Bass Limestone of the Unkar ...

(Ruin Granite)—are prominently found in all of the

Sierra Ancha The Sierra Ancha ("broad range" in Spanish, in Western Apache: Dził Nteel - "Wide Flat Mountain") is a mountain range in Gila County, in central Arizona. It lies between Roosevelt Lake to the south, the Tonto Basin to the west, Cherry Creek to ...

range, the range being separated by faults from its neighboring

Mazatzal Mountains The Mazatzal Mountains (MAH-zaht-ZAL, locally Ma-tuh-ZEL) are a mountain range in south central Arizona, about 30–45 miles northeast of the Phoenix metropolitan area. The origin of the name remains obscure but one possibility is that it is from ...

west, and the Salt River to the south. The Apache Group extends to regions east of the Sierra Ancha, and also regionally to

Globe A globe is a spherical model of Earth, of some other celestial body, or of the celestial sphere. Globes serve purposes similar to maps, but unlike maps, they do not distort the surface that they portray except to scale it down. A model glo ...

just south-southeast, and the neighboring Dripping Spring Mountains, again just south of the Globe region. The Apache Group in descending order from youngest to oldest geologic units: :*D- Troy Quartzite :*C-

Mescal Limestone Mescal and Mescall may refer to: Places * Mescal, Arizona, census designated place in Arizona * Mescal Arroyo, creek in Pima County, Arizona * Mescal Mountains, series of connected mountain ridges in southern Gila County, Arizona * Mescal Range, m ...

:*B- Dripping Spring Quartzite :** Barnes Conglomerate (Globe, Arizona region, lowest of Dripping Spring Q.) :*A-

Pioneer Shale Pioneer commonly refers to a settler who migrates to previously uninhabited or sparsely inhabited land. In the United States pioneer commonly refers to an American pioneer, a person in American history who migrated west to join in settling and dev ...

:**

Scanlon Conglomerate Scanlon is an Anglicized form of the Irish Gaelic name Ó Scannláin, meaning descendant of Scannlán’. Notable people with the name include: * Agnes Scanlon (1923–2018), American politician * Albert Scanlon (1935–2009), English soccer play ...

(lowest of Pioneer Shale)

References

*Lucchitta, 2001. ''Hiking Arizona's Geology,'' Ivo Lucchitta, c 2001, Mountaineers's Books, Hike 18, ''Aztec Peak Trail''-(Sierra Ancha), pp. 145–149 and ''Jug Trail to Jerome Creek''-(Sierra Ancha), pp. 170–174 (softcover, ) Mesoproterozoic geology Geologic formations of Arizona Geologic groups of the United States {{US-geologic-formation-stub