The Turtle Mountains (Amat 'Achii'ar in the

Mojave language Mojave or Mohave most often refers to: *Mojave Desert *Mojave River *Mohave people * Mojave language Mojave or Mohave may also refer to: Places * Fort Mojave Indian Reservation * Mohave County, Arizona * Mohave Valley, a valley in Arizona * Mo ...

), are located in northeastern

San Bernardino County San Bernardino County (), officially the County of San Bernardino, is a county located in the southern portion of the U.S. state of California, and is located within the Inland Empire area. As of the 2020 U.S. Census, the population was 2,181, ...

, in the southeastern part of

California California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the m ...

. The colorful Turtle Mountains vary from deep reds, browns, tans and grays, to black. The area has numerous springs and seeps. The Turtle Mountains are also a

National Natural Landmark The National Natural Landmarks (NNL) Program recognizes and encourages the conservation of outstanding examples of the natural history of the United States. It is the only national natural areas program that identifies and recognizes the best ...

, with two mountain sections of entirely different composition.

Geography

The Turtle Mountains are southwest of Needles, California, west off of U.S. Highway 95; with Vidal Junction close on the southeast, Twentynine Palms to the west, and Blythe is south. The Turtle Mountains are considered part of the greater Lower Colorado River Valley region. The range is directly west of and connected with the Mopah Range. They lie in a north–south direction east of Ward Valley and the Old Woman Mountains. They are west of the

Whipple Mountains The Whipple Mountains ( Mojave: Avii Kur'utat; Chemehuevi: Wiyaatuʷa̱) are located in eastern San Bernardino County, California. They are directly west of the Colorado River, Parker Dam, and Lake Havasu; south of Needles, California; north of ...

and

Colorado River The Colorado River ( es, Río Colorado) is one of the principal rivers (along with the Rio Grande) in the Southwestern United States and northern Mexico. The river drains an expansive, arid watershed that encompasses parts of seven U.S. s ...

. The Turtle Mountains reach an elevation of above sea level at Bolson Peak. They are a registered

in recognition of their exceptional natural values.

Geology

The Turtle Mountains are one of several ranges that constitute the Maria Fold and Thrust Belt. The Maria Fold and Thrust Belt underwent generally thick-skinned (involving basement rocks) North-South trending crustal shortening in the

Cretaceous The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of ...

, followed by generally east–west trending large-scale crustal extension in the

Miocene The Miocene ( ) is the first epoch (geology), geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and mea ...

. This North-South shortening is anomalous, as crustal shortening in the rest of the North American Cordillera is oriented generally east–west because of the generally east–west compression that was due to the subduction of the

Farallon plate The Farallon Plate was an ancient oceanic plate. It formed one of the three main plates of Panthalassa, alongside the Phoenix Plate and Izanagi Plate, which were connected by a triple junction. The Farallon Plate began subducting under the west ...

under western North America. Also unlike the rest of the North American Cordillera, deformation in the Maria Fold and Thrust Belt involved rocks of the

North American Craton North is one of the four compass points or cardinal directions. It is the opposite of south and is perpendicular to east and west. ''North'' is a noun, adjective, or adverb indicating direction or geography. Etymology The word ''north'' is ...

, most notably the Grand Canyon sequence of sedimentary rocks.

Wilderness

Established in 1994 by the U.S. Congress, the Turtle Mountains Wilderness ranges from broad bajadas to highly eroded volcanic peaks, spires, and cliffs. The 177,309 acre

wilderness area Wilderness or wildlands (usually in the plural), are natural environments on Earth that have not been significantly modified by human activity or any nonurbanized land not under extensive agricultural cultivation. The term has traditionally re ...

is managed by the U.S. Bureau of Land Management and is bordered by the

Stepladder Mountains Wilderness The Stepladder Mountains are located in southeastern California in the United States. The range, found in San Bernardino County, is home to the 84,199-acre (approximate) Stepladder Mountains Wilderness, which protects the Desert tortoise, Califo ...

to the north.

Natural history

The Turtle Mountains are located in an ecological transition zone between the

Mojave Desert The Mojave Desert ( ; mov, Hayikwiir Mat'aar; es, Desierto de Mojave) is a desert in the rain shadow of the Sierra Nevada mountains in the Southwestern United States. It is named for the indigenous Mojave people. It is located primarily ...

('' High Desert'') and Colorado Desert region of the

Sonoran Desert The Sonoran Desert ( es, Desierto de Sonora) is a desert in North America and ecoregion that covers the northwestern Mexican states of Sonora, Baja California, and Baja California Sur, as well as part of the southwestern United States (in Ariz ...

(''

Low Desert The Low Desert is a common name for any desert in California that is under 2,000 feet (609.6 m) in altitude. These areas include, but are not exclusive to, the Colorado Desert and Yuha Desert, in the Southern California portion of the Sonoran Dese ...

'') and therefore contains a high diversity of plant and animal species. The Turtle Mountain range is a northern or southern 'delimiter of occurrence' for some species; for example the

endangered An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and in ...

California fan palm ''Washingtonia filifera'', the desert fan palm, California fan palm, or California palm,Flora of North America Association. ''Flora of North America: North of Mexico Volume 22: Magnoliophyta: Alismatidae, Arecidae, Commelinidae (in Part), and Zi ...

(''Washingtonia filifera'') encounters the northern limit of its range in the Mopah-Turtle Mountains. Dominant vegetation in the Turtle Mountains Wilderness Area consists of the creosote bush-bur sage with

creosote bush ''Larrea tridentata'', called creosote bush and greasewood as a plant, chaparral as a medicinal herb, and ''gobernadora'' (Spanish for "governess") in Mexico, due to its ability to secure more water by inhibiting the growth of nearby plants. In S ...

(''Larrea tridentata'') and the palo verde-cactus shrub ecosystems with the palo verde tree (''Parkinsonia microphylla''). In the washes, Colorado/Sonoran microphylla woodlands can be found. These woodlands include such things as smoke tree (''Psorothamnus spinosus''),

honey mesquite ''Prosopis glandulosa'', commonly known as honey mesquite, is a species of small to medium-sized, thorny shrub or tree in the legume family (Fabaceae). Distribution The plant is primarily native to the Southwestern United States and Northern M ...

(''Prosopis velutina''), and catclaw (''Acacia greggii''). Wildlife species include

desert bighorn sheep The desert bighorn sheep (''Ovis canadensis nelsoni'') is a subspecies of bighorn sheep (''Ovis canadensis'') that is native to the deserts of the United States' intermountain west and southwestern regions, as well as northwestern Mexico. The ...

, coyote,

black-tailed jackrabbit The black-tailed jackrabbit (''Lepus californicus''), also known as the American desert hare, is a common hare of the western United States and Mexico, where it is found at elevations from sea level up to . Reaching a length around , and a ...

s, ground squirrels, kangaroo rats, quail,

roadrunner The roadrunners (genus ''Geococcyx''), also known as chaparral birds or chaparral cocks, are two species of fast-running ground cuckoos with long tails and crests. They are found in the southwestern and south-central United States and Mexico, us ...

golden eagle The golden eagle (''Aquila chrysaetos'') is a bird of prey living in the Northern Hemisphere. It is the most widely distributed species of eagle. Like all eagles, it belongs to the family Accipitridae. They are one of the best-known birds of ...

prairie falcon The prairie falcon (''Falco mexicanus'') is a medium-large sized falcon of western North America. It is about the size of a peregrine falcon or a crow, with an average length of 40 cm (16 in), wingspan of approximately 1 meter (40&n ...

s, rattlesnakes, the

desert tortoise The desert tortoise (''Gopherus agassizii''), is a species of tortoise in the Family (biology), family Testudinidae. The species is native to the Mojave Desert, Mojave and Sonoran Deserts of the southwestern United States and northwestern Mexic ...

and several species of lizards.

Recreation

Hiking Hiking is a long, vigorous walk, usually on trails or footpaths in the countryside. Walking for pleasure developed in Europe during the eighteenth century.AMATO, JOSEPH A. "Mind over Foot: Romantic Walking and Rambling." In ''On Foot: A Histor ...

horseback riding Equestrianism (from Latin , , , 'horseman', 'horse'), commonly known as horse riding (Commonwealth English) or horseback riding (American English), includes the disciplines of riding, driving, and vaulting. This broad description includes the ...

camping Camping is an outdoor activity involving overnight stays away from home, either without shelter or using basic shelter such as a tent, or a recreational vehicle. Typically, participants leave developed areas to spend time outdoors in more na ...

, rock hounding, photography, and

backpacking Backpacking may refer to: * Backpacking (travel), low-cost, independent, international travel * Backpacking (hiking), trekking and camping overnight in the wilderness * Ultralight backpacking, a style of wilderness backpacking with an emphasis on ...

can be enjoyed in this wilderness. The area is popular with rock hounding hobbyists and is nationally known for

chalcedony Chalcedony ( , or ) is a cryptocrystalline form of silica, composed of very fine intergrowths of quartz and moganite. These are both silica minerals, but they differ in that quartz has a trigonal crystal structure, while moganite is monocli ...

specimens in a form known as "Mopah roses". The natural palm oases of Coffin, Mopah, and Mohawk Springs, are popular hiking destinations.

References

Reference books

External links

Turtle Mountains Wilderness
- BLM
BLM Turtle Mountains Wilderness Map
---- {{authority control Mountain ranges of the Mojave Desert Mountain ranges of the Lower Colorado River Valley Mountain ranges of the Colorado Desert Mountain ranges of San Bernardino County, California National Natural Landmarks in California Protected areas of the Mojave Desert Protected areas of the Colorado Desert Protected areas of San Bernardino County, California Wilderness areas within the Lower Colorado River Valley Bureau of Land Management areas in California Nature reserves in California