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Izalco Volcano, Sonsonate Department, El Salvador
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Izalco Volcano, Sonsonate Department, El Salvador

Photo: Brent Thorne
Latitude: 13°48'N
Longitude: 89°36'W
The volcano was almost continously active from its birth in 1770 until 1958. Since then only a brief, very small flank eruption in 1966 has interrupted dormancy. Pre-1966 Izalco lavas are vesicular vitrophyric olivine basalts, usually with bytownite phenocrysts and augite.
Many new minerals have been found in the fumaroles and fumarolic sublimates which are unusually rich in vanadine.

Mineral List

var: Andesine

var: Bytownite

var: Labradorite
Bannermanite (TL)
Blossite (TL)
Fingerite (TL)
Howardevansite (TL)
Lyonsite (TL)
Mcbirneyite (TL)
Stoiberite (TL)
Ziesite (TL)

19 entries listed. 14 valid minerals. 8 type localities (valid minerals).

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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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