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OCEANIA MAP


ANTARCTICA MAP
  Mount Overlord
  Mount Melbourne
  Mount Erebus
  Mount Terror
  Mount Discovery
  Mount Morning
  Mount Berlin
  Mount Moulton
  Mount Andrus
  Mount Waesche
  Mount Sidley
  Mount Hampton
  Mount Siple
  Mount Steere
  Mount Frakes
  Toney Mountain
  Mount Takahe
  Mount Murphy
  Vinson Massif
  Big Ben





| Aerial view of the Mount Sidley caldera from the southwest
(U.S. Navy photo)   <click to enlarge>

Mount Sidley
    13717 ft (4181 m)     Highest volcano in Antarctica .
Location: Executive Committee Range,
Marie Byrd Land, Antarctica
Lat / Long: 77.1° S, 126.1° W
Volcanic Type: Dissected shield volcano with caldera
Volcanic Status: Dormant / extinct
First Ascent:
First Ski Descent:
Skiable Vertical: over 7000 ft (2100 m)



Mount Sidley is the highest volcano in Antarctica and also the highest mountain in Marie Byrd Land. Despite its stature, it rests in almost complete obscurity, unknown to most except the volcanologists who have studied it. Yet Mount Sidley is an outstanding mountain, a steep-sided shield volcano whose 3 mile (5 km) wide summit caldera has been shattered by an explosive eruption about 4.7 million years ago, the last major activity known to have occurred. This blew out most of the south side of the rim, forming a basin (called Weiss Amphitheater on the map) which is open to the south, with extensive hydrovolcanic deposits from the subglacial eruption extending outward for several miles. The 4000 ft (1200 m) wall on the north side of the caldera provides the best view of the interior of any the Marie Byrd Land volcanoes. On its smoother undissected north and east sides, Mount Sidley should provide a superb ski descent of over 7000 ft (2100 m) onto the flats of the surrounding ice sheet.

Some useful links:  

    United States Antarctic Resource Center
    USGS Atlas of Antarctic Research (online maps & photos)
   
   
Topographic map of Mounts Sidley and Waesche (1:250,000 scale)
    from USGS Mount Sidley and Mount Hampton
    <click to enlarge>



      More photos and info about routes, access, etc. may be added in the future ...


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Amar Andalkar   Seattle, WA, USA   <About the Author / Contact Me>
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