Ile de la Possession

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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 46.42°S
  • 51.75°E

  • 934 m
    3064 ft

  • 234040
  • Latitude
  • Longitude

  • Summit

  • Volcano

The Global Volcanism Program has no activity reports for Ile de la Possession.

The Global Volcanism Program has no Weekly Reports available for Ile de la Possession.

The Global Volcanism Program has no Bulletin Reports available for Ile de la Possession.

Basic Data

Volcano Number

Last Known Eruption



Unknown - Evidence Credible

934 m / 3064 ft


Volcano Types

Pyroclastic cone(s)

Rock Types

Basalt / Picro-Basalt
Trachybasalt / Tephrite Basanite
Trachyandesite / Basaltic trachy-andesite

Tectonic Setting

Rift zone
Oceanic crust (< 15 km)


Within 5 km
Within 10 km
Within 30 km
Within 100 km

Geological Summary

Ile de la Possession, located immediately west of Ile de l'Est in the Crozet archipelago, consists of a stratovolcano intruded by ring and cone dikes and modified by block faulting, marine erosion, and uplift. The structural center of the volcano is located on the western side of the 14 x 19 km wide island, which has an irregular shoreline. The stratovolcano was formed during at least five stages dating back to the Miocene. The eruption of plateau basalts from a rift system during stage IV was followed by a glacial period and then by the eruption of scoria cones and lava flows. The young scoria cones are of probable Holocene age and are distributed over much of the island. They are concentrated at the structural center on the west side and along a series of N-S and NE-trending fractures. The Mont Branca cone on the western flank has been estimated by Bellair (1964) to be not more than a few centuries old.


The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography.

Bellair P, 1964. Recent data on the geology of Isles Crozet. In: Adie R J (ed) {Antarctic Geol, Proc 1st Internatl Symp Antarctic Geol}, Amsterdam: Elsevier, p 3-7.

Gunn B M, Abranson E C, Watkins N D, Nougier J, 1972. Petrology and geochemistry of Iles Crozet: a summary. In: Adie R J (ed) {Antarctic Geol and Geophys}, IUGS Ser-B(1): 825-829.

LeMasurier W E, Thomson J W (eds), 1990. Volcanoes of the Antarctic Plate and Southern Oceans. Washington, D C: Amer Geophys Union, 487 p.

The Global Volcanism Program is not aware of any Holocene eruptions from Ile de la Possession. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Ile de la Possession page in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).

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.


Feature Name Feature Type Elevation Latitude Longitude
Branca, Mont Cone
Crateres, Monte De Cone

Photo Gallery

Ile de la Possession, located immediately west of Ile de l'Est in the Crozet archipelago, is seen in this NASA Space Shuttle image (with north to the top). The 14 x 19 km wide island is structurally complex and has an irregular shoreline. It consists of a stratovolcano intruded by ring and cone dikes and modified by block faulting, marine erosion, and uplift. Young scoria cones of probable Holocene age are distributed over much of the island.

NASA Space Shuttle image ISS006-E-37990, 2003 (

Smithsonian Sample Collections Database

There are no samples for Ile de la Possession in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.

Affiliated Sites

Large Eruptions of Ile de la Possession Information about large Quaternary eruptions (VEI >= 4) is cataloged in the Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
WOVOdat WOVOdat is a database of volcanic unrest; instrumentally and visually recorded changes in seismicity, ground deformation, gas emission, and other parameters from their normal baselines. It is sponsored by the World Organization of Volcano Observatories (WOVO) and presently hosted at the Earth Observatory of Singapore.
EarthChem EarthChem develops and maintains databases, software, and services that support the preservation, discovery, access and analysis of geochemical data, and facilitate their integration with the broad array of other available earth science parameters. EarthChem is operated by a joint team of disciplinary scientists, data scientists, data managers and information technology developers who are part of the NSF-funded data facility Integrated Earth Data Applications (IEDA). IEDA is a collaborative effort of EarthChem and the Marine Geoscience Data System (MGDS).
MODVOLC - HIGP MODIS Thermal Alert System Using infrared satellite Moderate Resolution Imaging Spectroradiometer (MODIS) data, scientists at the Hawai'i Institute of Geophysics and Planetology, University of Hawai'i, developed an automated system called MODVOLC to map thermal hot-spots in near real time. For each MODIS image, the algorithm automatically scans each 1 km pixel within it to check for high-temperature hot-spots. When one is found the date, time, location, and intensity are recorded. MODIS looks at every square km of the Earth every 48 hours, once during the day and once during the night, and the presence of two MODIS sensors in space allows at least four hot-spot observations every two days. Each day updated global maps are compiled to display the locations of all hot spots detected in the previous 24 hours. There is a drop-down list with volcano names which allow users to 'zoom-in' and examine the distribution of hot-spots at a variety of spatial scales.
MIROVA Middle InfraRed Observation of Volcanic Activity (MIROVA) is a near real time volcanic hot-spot detection system based on the analysis of MODIS (Moderate Resolution Imaging Spectroradiometer) data. In particular, MIROVA uses the Middle InfraRed Radiation (MIR), measured over target volcanoes, in order to detect, locate and measure the heat radiation sourced from volcanic activity.