The Cimarron Range is a

mountain range A mountain range or hill range is a series of mountains or hills arranged in a line and connected by high ground. A mountain system or mountain belt is a group of mountain ranges with similarity in form, structure, and alignment that have arise ...

located mainly in Colfax County of northeastern

New Mexico ) , population_demonym = New Mexican ( es, Neomexicano, Neomejicano, Nuevo Mexicano) , seat = Santa Fe , LargestCity = Albuquerque , LargestMetro = Tiguex , OfficialLang = None , Languages = English, Spanish ( New Mexican), Navajo, Ker ...

, United States. The range forms the eastern margin of the

Southern Rocky Mountains The Southern Rocky Mountains are a major subregion of the Rocky Mountains of North America located in the southeastern portion of the U.S. state of Wyoming, the central and western portions of Colorado, the northern portion of New Mexico, and ex ...

in north-central New to the west of

Cimarron, New Mexico Cimarron is a Village (United States), village in Colfax County, New Mexico, Colfax County, New Mexico, United States, which sits on the eastern slopes of the Sangre de Cristo Mountains. The population was 1,021 at the 2010 United States Census, 2 ...

. The range is about long and wide and is bounded by the Moreno Valley to the west, the

Great Plains The Great Plains (french: Grandes Plaines), sometimes simply "the Plains", is a broad expanse of flatland in North America. It is located west of the Mississippi River and east of the Rocky Mountains, much of it covered in prairie, steppe, an ...

to the east, the Raton Basin to the north, and Ocate Mesa to the south. The highest point is

Baldy Mountain There are a number of peaks named Baldy: Canada *Baldy Mountain (Manitoba), , *Big Baldy Mountain (Vancouver Island, British Columbia) Big Baldy Mountain is a mountain on Vancouver Island, British Columbia, Canada, located west of Gold River ...

, Large portions of the range are included in

Philmont Scout Ranch Philmont Scout Ranch is a ranch located in Colfax County, New Mexico, near the village of Cimarron; it covers of wilderness in the Sangre de Cristo Mountains on the east side of the Cimarron Range of the Rocky Mountains. Donated by oil baro ...

Geology

The range is a

Laramide The Laramide orogeny was a time period of mountain building in western North America, which started in the Late Cretaceous, 70 to 80 million years ago, and ended 35 to 55 million years ago. The exact duration and ages of beginning and end of the o ...

uplift defined by a normal fault on the west side and a thrust fault on the east side. The northern part of the uplift is covered by sedimentary beds of the easternmost Raton Basin, and the southern part of the uplift is covered with

basalt Basalt (; ) is an aphanite, aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the planetary surface, surface of a terrestrial ...

flows of Ocate Mesa, so that the structure of the uplift is obscured to the north and south. The northern part of the range is intruded by large bodies of granitic rock of

Tertiary Tertiary ( ) is a widely used but obsolete term for the geologic period from 66 million to 2.6 million years ago. The period began with the demise of the non-avian dinosaurs in the Cretaceous–Paleogene extinction event, at the start ...

age.

References

Mountain ranges of New Mexico {{NewMexico-geo-stub

Geology

See also

References