San Salvador Edifice
The San Salvador edifice formed more than 70,000 years ago, creating an edifice about 10 to 14 km in diameter and 3,000m above sea level. Later, an explosive eruptive episode called 'G-1' (about 40,000 to 50,000 years ago) formed a crater that was 4.5 km by 6 km in size. The Picacho and Jabali peaks are the remnants of this crater. The G-1 episode erupted a dacitic pumice effusion, likely in a plinian style eruption.
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