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The Global Volcanism Program has no activity reports for Granada.
The Global Volcanism Program has no Weekly Reports available for Granada.
The Global Volcanism Program has no Bulletin Reports available for Granada.
A semi-arcuate, N-S-trending fissure located between the city of Granada and the eastern rim of Apoyo caldera was the source of the Granada alignment of small cinder cones and craters. The lineament (also known as the La Joya alignment after La Joya explosions craters SW of Granada) cuts across the flanks of Apoyo caldera only 2 km from its rim. However, the Granada alignment is structurally distinct from the caldera and is analogous to the Nejapa-Miraflores alignment north of Masaya volcano. The lineament extends from north of Granada to the northern flanks of Mombacho volcano and is characterized by the eruption of basaltic lavas and tephras compositionally similar to mid-ocean ridge basalts. A series of interconnecting collapse-explosion pits similar to those at Nejapa-Miraflores lies immediately east of the Granada cinder cone alignment. The Granada lineament originated about 12,000 years ago, and the latest eruptions may have occurred as recently as about 2000 years ago.
The Global Volcanism Program is not aware of any Holocene eruptions from Granada. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Granada 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|
|Chanal, Cerro el||Cinder cone|
|San Antonio, Cerro||Cinder cone|
|A quarry exposes bedded oxidized scoria layers in a cinder cone of the fissure-fed Granada alignment. The cone was constructed along a semi-arcuate, N-S-trending fracture located between the city of Granada and the northern flanks of Mombacho volcano, east of the rim of Apoyo caldera. The lineament is also known as the La Joya alignment, after the explosion craters located SW of Granada. The alignment originated about 12,000 years ago, and its latest eruptions may have occurred as recently as about 2000 years ago.
Photo by Lee Siebert, 1998 (Smithsonian Institution).
|Two major scarps cutting Mombacho volcano (left-center) were the sources of major debris avalanches. The arcuate peninsula and island chain extending into Lake Nicaragua (known as Las Isletas or Isletas de Granada) was produced by collapse of Mombacho to the NE. The island at the right is Zapatera, a small shield volcano and maar complex. The lake at the far left fills late-Pleistocene Apoyo caldera, and the roughly N-S-trending Granada cinder cone alignment lies NNW of Mombacho and east of Lake Apoyo in this NASA Space Shuttle image (with north to the upper left).
NASA Space Shuttle image STS081-742-25, 1997 (http://eol.jsc.nasa.gov/).
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.
Navarro M, 1998. . (pers. comm.).
Sussman D, 1985. Apoyo Caldera, Nicaragua: a major Quaternary silicic eruptive center. J Volc Geotherm Res, 24: 249-282.
van Wyk de Vries B, 1993. Tectonics and magma evolution of Nicaraguan volcanic systems. Unpublished PhD thesis, Open Univ, Milton Keynes, 328 p.
Walker J A, 1984. Volcanic rocks from the Nejapa and Granada cinder cone alignments, Nicaragua, Central America. J Petr, 25: 299-342.