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Seal Nunataks Group

Photo of this volcano
  • Antarctica
  • Antarctica
  • Pyroclastic cone(s)
  • Unknown - Evidence Credible
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 65.03°S
  • 60.05°W

  • 368 m
    1207 ft

  • 390050
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

Most Recent Bulletin Report: September 1982 (SEAN 07:09) Citation IconCite this Report

Two previously unknown recent volcanoes identified

In January 1982, geologists from the Universidad de Chile found evidence of recent volcanism at two sites in the Seal Nunataks Group that had not previously been identified as recent volcanic centers. At Dallman (65.02°S, 60.32°W), very fresh-looking basaltic lava had emerged from the central crater and flowed to the NW foot of the volcano. Active fumaroles were observed at the N side of the summit. Abundant basaltic lapilli and ash covered wide areas of the Larsen Ice Shelf in the vicinity of Murdoch Volcano (65.03°S, 60.03°W). Portions of these deposits were covered by fresh snow. Fumaroles were active in a small parasitic cinder cone SE of Murdoch.

In December 1893, C.A. Larsen saw an eruption of black ash from Lindenberg (64.92°S, 59.70°W) and solfataric activity at Christensen (65.10°S, 59.57°W), but no activity was observed at either of these volcanoes in 1982.

Information Contacts: O. González-Ferrán, Univ. de Chile.

The Global Volcanism Program has no Weekly Reports available for Seal Nunataks Group.

Bulletin Reports - Index

Reports are organized chronologically and indexed below by Month/Year (Publication Volume:Number), and include a one-line summary. Click on the index link or scroll down to read the reports.

09/1982 (SEAN 07:09) Two previously unknown recent volcanoes identified




Information is preliminary and subject to change. All times are local (unless otherwise noted)


September 1982 (SEAN 07:09) Citation IconCite this Report

Two previously unknown recent volcanoes identified

In January 1982, geologists from the Universidad de Chile found evidence of recent volcanism at two sites in the Seal Nunataks Group that had not previously been identified as recent volcanic centers. At Dallman (65.02°S, 60.32°W), very fresh-looking basaltic lava had emerged from the central crater and flowed to the NW foot of the volcano. Active fumaroles were observed at the N side of the summit. Abundant basaltic lapilli and ash covered wide areas of the Larsen Ice Shelf in the vicinity of Murdoch Volcano (65.03°S, 60.03°W). Portions of these deposits were covered by fresh snow. Fumaroles were active in a small parasitic cinder cone SE of Murdoch.

In December 1893, C.A. Larsen saw an eruption of black ash from Lindenberg (64.92°S, 59.70°W) and solfataric activity at Christensen (65.10°S, 59.57°W), but no activity was observed at either of these volcanoes in 1982.

Information Contacts: O. González-Ferrán, Univ. de Chile.

This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.

Eruptive History

There is data available for 2 Holocene eruptive periods.

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
[ 1980 Jun 15 ± 545 days ] [ Unknown ] Uncertain     Dallman, Murdoch
[ 1893 Dec 11 ] [ Unknown ] Uncertain 1   Lindenberg Island
Deformation History

There is no Deformation History data available for Seal Nunataks Group.

Emission History

There is no Emissions History data available for Seal Nunataks Group.

Photo Gallery

Volcán Murdoch is one of a group of 16 nunataks emerging from the Larsen Ice Shelf east of Graham Land Peninsula that form the Seal Nunataks. The Seal Nunataks have been described as separate volcanic vents or remnants of a large shield volcano. Lindenberg Nunatak was observed to emit columns of thick, black smoke in 1893. Scoria was observed on the ice surface in the Seal Nunataks area during 1968, suggesting a 20th-century eruption.

Photo by Oscar González-Ferrán (University of Chile).
See title for photo information.
GVP Map Holdings

The maps shown below have been scanned from the GVP map archives and include the volcano on this page. Clicking on the small images will load the full 300 dpi map. Very small-scale maps (such as world maps) are not included. The maps database originated over 30 years ago, but was only recently updated and connected to our main database. We welcome users to tell us if they see incorrect information or other problems with the maps; please use the Contact GVP link at the bottom of the page to send us email.


Title: N Graham Land & S Shetland Islands
Publisher: BAS British Antarctic Survey, Cambridge
Country: Antarctica
Year: 1979
Series: 500
Map Type: Geology
Scale: 1:500,000
Map of N Graham Land & S Shetland Islands

Title: Falkland Islands Dependencies, Graham Land
Publisher: DOS
Country: Antarctica
Year: 1961
Series: D501 (610)
Map Type: Topographic
Scale: 1:200,000
Map of Falkland Islands Dependencies, Graham Land
Smithsonian Sample Collections Database

There are no samples for Seal Nunataks Group in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.

External Sites