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Data from the Global Volcanism Program of the Smithsonian Institution
Details for: San Luis, Isla
Isla San Luis lies across a narrow channel from the NE coast of Baja California (in the background). A rhyolite obsidian dome is in the center of the small island. An older dome forms the northern part of the island (foreground) and is partially mantled by ash and pumice from the central dome. An eroded tuff ring, Plaza de Toros, occupies the SE end of the island. Photo by Keith Sutter, 2000.
Volcano Number:
341003
Volcano Name:
San Luis, Isla
Country:
Mexico
Volcano Type:
Tuff cone
Last Eruption:
1141 BCE
Elevation:
183m
Tectonic Setting:
Rift zone / Continental crust (> 25 km)
Pop. within 10km:
1
Pop. within 30km:
606
Pop. within 100km:
18532
Latitude:
29.9728
Longitude:
-114.4082
Details
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Isla San Luis is the largest of the seven Encantada islands at the NW end of the Guaymas lineament in the northern part of the Gulf of California. The 4.5 km2 island (also known as La Encantada Mayor, or Salvatierra) is located 3 km off the eastern shore of Baja California north of Punta Bufeo, and has an irregular shoreline with a narrow peninsula forming its SW tip. Initial basaltic andesite and andesitic submarine eruptions producing palagonite tuffs were followed by effusion of subaerial dacitic lava flows and the formation of dacitic tuff rings. The latest eruptions formed two rhyolitic obsidian domes, the younger in a tuff cone at the center of the island and at the older at the NW tip of the island. In their detailed study of the island, Paz Moreno and Demant (1999) did not specifically suggest Holocene activity, but noted that the "well-preserved morphology of the volcanic structures clearly support a late Quaternary age for all the eruptive activity" and that the northern lava dome may have been emplaced during the 110-130 ka interglacial period. Hausback aet al. (2003) 14C dated marine mollusk shells associated with three eruptions in the last 5,000 years.
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Eruption Data from the Global Volcanism Program of the Smithsonian Institution
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Emissions Data from the Global Volcanism Program of the Smithsonian Institution
Sorry. No emissions data found for this volcano.
Data from the Earthchem Library
Sorry. No data exist for this volcano in the EarthChem Library.
Data from the Earthchem Portal
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Data from the SESAR Database
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Data from the MaGa Database
Sorry. No data exist for this volcano in the MaGa database.
Data from UNAVCO
Sorry. No data exist for this volcano in the UNAVCO database.
Data from USIEI
Sorry. This volcano is not covered by any USIEI projects
Data from IRIS FDSNWS
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