Adirondacks Mount Marcy From Mount Haystack

The Marcy Group, or Marcy Massif is a subset of the

Great Range The Great Range is a mountain range in the Adirondack Mountains, near Keene Valley, New York, United States. It rises in the heart of the High Peaks region between Ausable Lakes to the southeast and the Johns Brook Valley to the northwest. ...

of the

Adirondack Mountains The Adirondack Mountains ( ) are a massif of mountains in Northeastern New York which form a circular dome approximately wide and covering about . The region contains more than 100 peaks, including Mount Marcy, which is the highest point in Ne ...

, near Keene Valley,

New York New York most commonly refers to: * New York (state), a state in the northeastern United States * New York City, the most populous city in the United States, located in the state of New York New York may also refer to: Places United Kingdom * ...

United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...

. It consists of the High Peaks near

Mount Marcy Mount Marcy is the highest point in the Adirondack Mountains and the U.S. state of New York (state), New York, with an elevation of . It is located in the town of Keene, New York, Keene in Essex County, New York, Essex County. The mountain is ...

at the southern end of the Great Range, Allen Mountain, Cliff Mountain, Mount Colden, Gray Peak,

Mount Haystack Mount Haystack is a mountain in the Great Range of the Adirondack Mountains of New York. With an elevation of , it is the third-highest mountain in New York and one of the 46 High Peaks in Adirondack Park. It is located in the town of Keene i ...

, Mount Redfield, and Mount Skylight, and the lesser peaks McDonnel Mountain, North River Mountains Peak, and Rist Mountain.

Geology

The group is unique for its formation and composition of minerals, particularly for its composition of

anorthosite Anorthosite () is a phaneritic, intrusive rock, intrusive igneous rock characterized by its composition: mostly plagioclase feldspar (90–100%), with a minimal mafic component (0–10%). Pyroxene, ilmenite, magnetite, and olivine are the mafic ...

rock. The Marcy

massif A massif () is a principal mountain mass, such as a compact portion of a mountain range, containing one or more summits (e.g. France's Massif Central). In mountaineering literature, ''massif'' is frequently used to denote the main mass of an ...

includes two separate groups of plutons, an eastern and western range. The western range is situated near the St. Regis and Long Lake quadrangles and the eastern Marcy group is sited near

Jay Jays are a paraphyletic grouping of passerine birds within the family Corvidae. Although the term "jay" carries no taxonomic weight, most or all of the birds referred to as jays share a few similarities: they are small to medium-sized, usually ...

, Hurricane Mountain, and the town of North Hudson.

References

External links

PeakBagger.com - Marcy Group
Adirondack High Peaks Landforms of Essex County, New York Mountain ranges of New York (state) {{EssexCountyNY-geo-stub