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The Gran Desierto sand sheets and dunes are located atop deltaic deposits of the Pleistocene Colorado River. The lower Colorado River was captured by the Gulf of California 1.2 million years before present. [9] This event places an upper bound on the age of the Gran Desierto with the Colorado's major clastic sediment sources.
El Pinacate and Gran Desierto de Altar Biosphere Reserve (Spanish: Reserva de la Biosfera El Pinacate y Gran Desierto de Altar) is a biosphere reserve and UNESCO World Heritage Site [1] managed by the federal government of Mexico, specifically by Secretariat of the Environment and Natural Resources, in collaboration with the state governments of Sonora and the Tohono O'odham.
El Pinacate y Gran Desierto de Altar Biosphere Reserve (Spanish: Reserva de la Biosfera El Pinacate y Gran Desierto de Altar), is a biosphere reserve and UNESCO World Heritage Site [4] It is in the Sonoran Desert in the eastern part Gran Desierto de Altar, just south of the border with Arizona, United States and north of the city of Puerto Peñasco.
The El Pinacate y Gran Desierto de Altar Biosphere Reserve is a biosphere reserve, in the Spanish language Reserva de la Biosfera el Pinacate y Gran Desierto de Altar, managed by the Mexican Federal Government's SEMARNAT - the Ministry of the Environment and Natural Resources, in collaboration with the government of the State of Sonora's IMADES ...
Reserva de la Biosfera el Pinacate y Gran Desierto de Altar East Bank–Colorado Riv. The western route parallelling the Colorado River, covers more plains, of the Colorado Desert / Mojave Desert , rising to, and down from various mountain passes , (for example south of Needles, California (the Sacramento Mountains (California) ), or ...
Within the southern Sonoran Desert in Mexico is found the Gran Desierto de Altar, with the El Pinacate y Gran Desierto de Altar Biosphere Reserve, encompassing 2,000 square kilometres (770 sq mi) of desert and mountainous regions. [7] The biosphere reserve includes the only active erg dune region in North America.
The Altar Valley is a 45-mile (72 km) long north–south valley, trending slightly northeast from Sasabe, Arizona on the Mexico border to the Avra Valley west of the Tucson Mountains. It is delimited by Arizona State Route 86 , from east-to-west on the north separating it from the Avra Valley which then trends northwesterly , merging into the ...
The desert is also on the north border of the Gran Desierto de Altar of Sonora, Mexico. The Lechuguilla Desert lies to the east-northeast of the connected ranges, Gila Mountains, and north of the Tinajas Altas Mountains, which extend southeast into north Sonora. To the west and southwest of the two ranges lies the Yuma Desert.