- Source: Porphyry Mountain
Porphyry Mountain is a prominent 6,375-foot (1,943 meter) mountain summit located in the Wrangell Mountains, in the U.S. state of Alaska. The peak is situated in Wrangell-St. Elias National Park and Preserve, immediately southeast of Kennecott, 4 mi (6 km) northeast of McCarthy, and, 5 mi (8 km) northwest of Sourdough Peak. Precipitation runoff from the mountain drains into tributaries of the Nizina River, which in turn is part of the Copper River drainage basin. The peak is notable for a rock glacier on its north slope. The mountain was so named because it is largely composed of porphyry, which is a very hard igneous rock. The mountain's local name was reported in 1908 by the U.S. Geological Survey. On a clear day the summit of Porphyry Mountain offers views of Donoho Peak, Kennicott Glacier, and Mount Blackburn to the northwest, and Fireweed Mountain to the west.
Climate
Based on the Köppen climate classification, Porphyry Mountain is located in a subarctic climate zone with long, cold, snowy winters, and cool summers. Weather systems coming off the Gulf of Alaska are forced upwards by the Wrangell Mountains (orographic lift), causing heavy precipitation in the form of rainfall and snowfall. Temperatures can drop below −20 °C with wind chill factors below −30 °C. The months May through June offer the most favorable weather for viewing and climbing.
Gallery
See also
List of mountain peaks of Alaska
Geography of Alaska
Kennecott, Alaska
References
External links
Weather forecast: Porphyry Mountain
National Creek Rock Glacier: Fickr photo
Kata Kunci Pencarian:
- Newmont Mining Corporation
- Porphyry Mountain
- Porphyry
- Porphyry (geology)
- List of mountains of the United States
- Villiaumite
- Battle Mountain, Nevada
- Phetchabun Mountains
- Saint Porphyrius
- Andes
- Ortiz Mountains
