Grizzly Peak (Sawatch Range)

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Grizzly Peak
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Grizzly Peak
Highest point
Elevation 13,995 ft (4265.6 m) [1] NAVD88
Prominence 1928 ft (588 m) [2]
Isolation 6.77 mi (10.89 km) [2]
Listing
Coordinates 39°02′33″N106°35′51″W / 39.0424631°N 106.5975938°W / 39.0424631; -106.5975938 Coordinates: 39°02′33″N106°35′51″W / 39.0424631°N 106.5975938°W / 39.0424631; -106.5975938 [1]
Geography
Location Continental Divide between
Chaffee and Pitkin counties, Colorado, United States [3]
Parent range Sawatch Range,
Collegiate Peaks [2]
Topo map USGS 7.5' topographic map
Independence Pass, Colorado [1]
Geology
Age of rock Oligocene (~ 24–33 million yrs)
Climbing
Easiest route Scramble, class 2+

Grizzly Peak is a high and prominent mountain summit of the Collegiate Peaks in the Sawatch Range of the Rocky Mountains of North America. The 13,995-foot (4265.6 m) thirteener is located 2.6 miles (4.2 km) south-southwest (bearing 202°) of Independence Pass, Colorado, United States, on the Continental Divide separating San Isabel National Forest and Chaffee County from White River National Forest and Pitkin County. [1] [2] [3]

Elevation Height of a geographic location above a fixed reference point

The elevation of a geographic location is its height above or below a fixed reference point, most commonly a reference geoid, a mathematical model of the Earth's sea level as an equipotential gravitational surface . The term elevation is mainly used when referring to points on the Earth's surface, while altitude or geopotential height is used for points above the surface, such as an aircraft in flight or a spacecraft in orbit, and depth is used for points below the surface.

Topographic prominence characterizes the height of a mountain or hills summit by the vertical distance between it and the lowest contour line encircling it but containing no higher summit within it; it is a measure of the independence of a summit

In topography, prominence measures the height of a mountain or hill's summit relative to the lowest contour line encircling it but containing no higher summit within it. It is a measure of the independence of a summit. A peak's key col is a unique point on this contour line and the parent peak is some higher mountain, selected according to various criteria.

Mountain A large landform that rises fairly steeply above the surrounding land over a limited area

A mountain is a large landform that rises above the surrounding land in a limited area, usually in the form of a peak. A mountain is generally steeper than a hill. Mountains are formed through tectonic forces or volcanism. These forces can locally raise the surface of the earth. Mountains erode slowly through the action of rivers, weather conditions, and glaciers. A few mountains are isolated summits, but most occur in huge mountain ranges.

Contents

Elevation

Grizzly Peak is the highest summit in the United States less than 14,000 feet (4,267.2 m), making it the highest thirteener in the country. At one time, the peak's elevation was measured to be over 14,000 feet and was believed to be a fourteener, but more recent and accurate surveys have dropped it below that threshold.

United States Federal republic in North America

The United States of America (USA), commonly known as the United States or America, is a country comprising 50 states, a federal district, five major self-governing territories, and various possessions. At 3.8 million square miles, the United States is the world's third or fourth largest country by total area and is slightly smaller than the entire continent of Europe, which is 3.9 million square miles. With a population of over 327 million people, the U.S. is the third most populous country. The capital is Washington, D.C., and the most populous city is New York City. Most of the country is located contiguously in North America between Canada and Mexico.

Fourteener Wikimedia list article

In the mountaineering parlance of the Western United States, a fourteener is a mountain peak with an elevation of at least 14,000 feet. There are 96 fourteeners in the United States, all west of the Mississippi River. Colorado has the most (53) of any single state; Alaska is in second place with 29. Many peak baggers try to climb all fourteeners in the contiguous United States, one particular state, or another region.

Geology

The mountain is composed of andesite lava flows and breccias of Oligocene age. [4]

Andesite An intermediate volcanic rock

Andesite ( or ) is an extrusive igneous, volcanic rock, of intermediate composition, with aphanitic to porphyritic texture. In a general sense, it is the intermediate type between basalt and rhyolite, and ranges from 57 to 63% silicon dioxide (SiO2) as illustrated in TAS diagrams. The mineral assemblage is typically dominated by plagioclase plus pyroxene or hornblende. Magnetite, zircon, apatite, ilmenite, biotite, and garnet are common accessory minerals. Alkali feldspar may be present in minor amounts. The quartz-feldspar abundances in andesite and other volcanic rocks are illustrated in QAPF diagrams.

Lava Molten rock expelled by a volcano during an eruption

Lava is molten rock generated by geothermal energy and expelled through fractures in planetary crust or in an eruption, usually at temperatures from 700 to 1,200 °C. The structures resulting from subsequent solidification and cooling are also sometimes described as lava. The molten rock is formed in the interior of some planets, including Earth, and some of their satellites, though such material located below the crust is referred to by other terms.

Breccia Rock composed of broken fragments cemented by a matrix

Breccia is a rock composed of broken fragments of minerals or rock cemented together by a fine-grained matrix that can be similar to or different from the composition of the fragments.

Historical names

Other summits with same name

Grizzly Peak is not only the name of Colorado's highest thirteener, but the state has four other Grizzly Peaks plus one Grizzly Mountain on the list: [5]

RankMountainHeightRange
54Grizzly Peak13,995 ft (4,266 m) Sawatch Range
130Grizzly Peak13,738 ft (4,187 m) San Juan Mountains
142Grizzly Mountain13,708 ft (4,178 m) Sawatch Range
145Grizzly Peak13,700 ft (4,176 m) San Juan Mountains
302 Grizzly Peak 13,427 ft (4,093 m) Front Range
415Grizzly Peak13,281 ft (4,048 m) Sawatch Range

See also

Related Research Articles

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Mount Princeton mountain in United States of America

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Mount Shavano mountain in United States of America

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Mount Parnassus (Colorado) mountain in United States of America

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French Mountain mountain in United States of America

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Ice Mountain (Colorado) mountain in United States of America

Ice Mountain is a high mountain summit of the Collegiate Peaks in the Sawatch Range of the Rocky Mountains of North America. The 13,958-foot (4,254 m) thirteener is located in the Collegiate Peaks Wilderness, 17.1 miles (27.5 km) west-northwest of the Town of Buena Vista, Colorado, United States, on the Continental Divide separating San Isabel National Forest and Chaffee County from White River National Forest and Pitkin County.

Mount Hope (Colorado) mountain in United States of America

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Garfield Peak (Colorado) mountain in United States of America

Garfield Peak is a high mountain summit of the Collegiate Peaks in the Sawatch Range of the Rocky Mountains of North America. The 13,787-foot (4,202 m) thirteener is located 5.6 miles (9.0 km) south-southwest of Independence Pass, Colorado, United States, on the Continental Divide separating San Isabel National Forest and Chaffee County from White River National Forest and Pitkin County. Garfield Peak was named in honor of James A. Garfield, 20th President of the United States.

References

  1. 1 2 3 4 "GRIZZLY". NGS data sheet. U.S. National Geodetic Survey . Retrieved January 8, 2016.
  2. 1 2 3 4 "Grizzly Peak, Colorado". Peakbagger.com. Retrieved January 8, 2016.
  3. 1 2 3 "Grizzly Peak". Geographic Names Information System . United States Geological Survey . Retrieved October 29, 2014.
  4. "GSA Program for 1999 Annual Meeting, Continental Divide - Sawatch Range and James Peak, Colorado" . Retrieved 2007-03-03.
  5. "Colorado's Summits – 13,000 to 13,999 feet" . Retrieved 2007-03-02.