Aiken's Wash is an archaeologically and geologically significant

wash Wash or the Wash may refer to: Industry and sanitation * WASH or WaSH, "water, sanitation and hygiene", three related public health issues * Wash (distilling), the liquid produced by the fermentation step in the production of distilled beverages ...

located in the

Mojave National Preserve Mojave National Preserve is a United States National Preserve located in the Mojave Desert of San Bernardino County, California, US, between Interstate 15 in California, Interstate 15 and Interstate 40. The preserve was established October 31, ...

San Bernardino County San Bernardino County ( ), officially the County of San Bernardino and sometimes abbreviated as S.B. County, 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 th ...

California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...

. The wash includes several

pictograph A pictogram (also pictogramme, pictograph, or simply picto) is a graphical symbol that conveys meaning through its visual resemblance to a physical object. Pictograms are used in systems of writing and visual communication. A pictography is a wri ...

and

petroglyph A petroglyph is an image created by removing part of a rock surface by incising, picking, carving, or abrading, as a form of rock art. Outside North America, scholars often use terms such as "carving", "engraving", or other descriptions ...

sites dating from the late pre-Columbian period. The proximity of pictographs and petroglyphs is unusual in the

Mojave Desert The Mojave Desert (; ; ) is a desert in the rain shadow of the southern Sierra Nevada mountains and Transverse Ranges in the Southwestern United States. Named for the Indigenous peoples of the Americas, indigenous Mohave people, it is located pr ...

region. The area was added to the

National Register of Historic Places The National Register of Historic Places (NRHP) is the Federal government of the United States, United States federal government's official United States National Register of Historic Places listings, list of sites, buildings, structures, Hist ...

as the Aiken's Wash National Register District. The district comprises , including all major archaeological sites in the wash.

Description

The two largest rock art groupings are at Aiken's Arch and Milky Way Caves; other prominent groupings are at Aiken's Cove, Aiken's Tank, Metate Cliff, Shadow Cave, and The Dikes. Patterns depicted in the petroglyphs include anthropomorphs, circles and curves, grids and lattices, and occasional zoomorphs or phytomorphs; the pictographs, which mainly use red dye, show similar patterns.Musser, Ruth A. ''National Register of Historic Places Inventory - Nomination Form: Aiken's Wash National Register District''.

National Park Service The National Park Service (NPS) is an List of federal agencies in the United States, agency of the Federal government of the United States, United States federal government, within the US Department of the Interior. The service manages all List ...

. July 20, 1981. Available on request from the National Park Service in redacted form. The wash also includes multiple pre-Columbian habitation sites. Three rockshelters have been found in the wash; all are associated with rock art sites. In addition, a house site has been discovered near Aiken's Arch; the site includes multiple round house rings.

Geology

The wash is also one of the most significant

volcano A volcano is commonly defined as a vent or fissure in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most oft ...

sites in the Mojave Desert. The site includes multiple extinct

cinder cone A cinder cone or scoria cone is a steep, volcanic cone, conical landform of loose pyroclastic rock, pyroclastic fragments, such as volcanic ash, clinkers, or scoria that has been built around a volcanic vent. The pyroclastic fragments are forme ...

s and volcanic flow areas. The volcanoes originally date from two periods; one set emerged in the early

Pleistocene The Pleistocene ( ; referred to colloquially as the ''ice age, Ice Age'') is the geological epoch (geology), epoch that lasted from to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fin ...

, while the other came about in the late Pleistocene or

Holocene The Holocene () is the current geologic time scale, geological epoch, beginning approximately 11,700 years ago. It follows the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene to ...

. The most recent volcanic activity in the region most likely occurred between 800 and 1000 years ago.

References

{{National Register of Historic Places Archaeological sites on the National Register of Historic Places in California Geography of San Bernardino County, California Petroglyphs in California Volcanoes of San Bernardino County, California Volcanism of California Historic districts on the National Register of Historic Places in California Volcanoes of California Landforms of San Bernardino County, California Cinder cones of the United States National Register of Historic Places in San Bernardino County, California