The launch of a new GVP website is scheduled for Monday, May 20, 2013.
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Subregion Name: | West Antarctica | |
| Volcano Number: | 1900-05= | ||
| Volcano Type: | Pyroclastic cones | ||
| Volcano Status: | Uncertain | ||
| Last Known Eruption: | Unknown | ||
| Summit Elevation: | 368 m | 1,207 feet | |
| Latitude: | 65.03°S * | 65°2'0"S | |
| Longitude: | 60.05°W | 60°3'0"W | |
| The Seal Nunataks are a group of 16 nunataks emerging from the Larsen Ice Shelf east of Graham Land Peninsula. The Seal Nunataks have been described as separate volcanic vents or remnants of a large shield volcano. Fumarolic activity was reported from Murdoch and Dallman cones in 1982, and fresh-looking pyroclastics and a lava flow at Dallman (not observed in 1979) were seen on the ice surface three years later (González-Ferrán 1983). Fumarolic activity was observed at Christensen in 1893, and Lindenberg was observed in eruption in 1893. Baker (1968) saw cinders on the ice surface, suggesting a 20th-century eruption. A 1988 British expedition noted that tephra away from nunataks was found only in ice-cored moraines, suggesting a glacial rather than pyroclastic origin. They noted no fumarolic activity, although water vapor resulting from radiant heating of ice-cored moraines was observed. | |||
