Robinson Crusoe

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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 33.658°S
  • 78.85°W

  • 922 m
    3024 ft

  • 356020
  • Latitude
  • Longitude

  • Summit

  • Volcano

The Global Volcanism Program has no activity reports for Robinson Crusoe.

The Global Volcanism Program has no Weekly Reports available for Robinson Crusoe.

The Global Volcanism Program has no Bulletin Reports available for Robinson Crusoe.

Volcano Types


Tectonic Setting

Oceanic crust (< 15 km)

Rock Types

Basalt / Picro-Basalt
Trachybasalt / Tephrite Basanite


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

Geological Summary

The main part of Robinson Crusoe (Mas a Tierra) Island, in the central part of the Juan Fernandez Island group, is composed of four overlapping shield volcanoes with calderas breached to the NE. The SW part of the basaltic island consists of smaller altered cones. Potassium-Argon dates for the island range from 5.8 to 3.8 million years ago (Steussy et al., 1984) and the island is more dissected than Alexander Selkirk (Mas a Fuera) Island to the west. An eruption at El Yunque was reported in 1743, but is considered uncertain (Catalog of Active Volcanoes of the World). Reports exist of a submarine eruption about 1.5 km north of the island in 1835 that produced an explosion and flames that lit up the island, primarily from the Governor, but the story varied over the years and no evidence was ever located (see CAVW for summary).

The Global Volcanism Program is not aware of any Holocene eruptions from Robinson Crusoe. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Robinson Crusoe 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.


Mas a Tierra


Feature Name Feature Type Elevation Latitude Longitude
Yunque, El
    Anvil, The
Stratovolcano 922 m 33° 39' 29" S 78° 51' 0" W

The Global Volcanism Program has no photographs available for Robinson Crusoe.


The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title.

Baker P E, Keyvan-Scocouhi F A, 1982. Petrology and geochemistry of the Juan Fernandez Islands, south east Pacific. In: Schmincke H-U, Baker P E, Forjaz V H (eds) {Proc Symp Activity Oceanic Volcanoes}, Arquipelago, Revista Univ Dos Acores, 3: 255-264.

Farley K A, Basu A R, Craig H, 1993. He, Sr and Nd isotopic variations in lavas from the Juan Fernandez archipelago, SE Pacific. Contr Mineral Petr, 115: 75-87.

Katsui Y (ed), 1971. List of the World Active Volcanoes. Volc Soc Japan draft ms, (limited circulation), 160 p.

Natland J H, 2003. Capture of helium and other volatiles during the growth of olivine phenocrysts in picritic basalts from the Juan Fernandez Islands. J Petr, 44: 421-456.

Richards A F, 1962. Archipelago de Colon, Isla San Felix and Islas Juan Fernandez. Catalog of Active Volcanoes of the World and Solfatara Fields, Rome: IAVCEI, 14: 1-50.

Stuessy T F, Foland K A, Sutter J F, Sanders R W, Silva-O M, 1984. Botanical and geological significance of Potassium-Argon dates from the Juan Fernandez islands. Science, 225: 49-51.

Affiliated Databases

Large Eruptions of Robinson Crusoe 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).
Smithsonian Collections Search the Smithsonian's NMNH Department of Mineral Sciences collections database. Go to the "Search Rocks and Ores" tab and use the Volcano Name drop-down to find samples.