Get Cerro Mac%C3%A1 essential facts below. View Videos or join the Cerro Mac%C3%A1 discussion. Add Cerro Mac%C3%A1 to your PopFlock.com topic list for future reference or share this resource on social media.
Cerro Macá is a relatively small volcano with a volume of only 39 cubic kilometres (9.4 cu mi). It has a summit elevation of approximately 2,300 m above sea level and features glaciers that in 2011 covered an area of 27.62 square kilometres (10.66 sq mi). The edifice is partially eroded and a sector collapse is probably the origin of a large steep sided depression in the summit area.Pyroclastic cones with associated lava flows are found on its southwestern flank but also on the other slopes of the volcano, as far down as sea level and in the Bahia Aysen.
1,440 ± 40 calibrated radiocarbon years ago a moderate explosive eruption deposited the MAC1 tephra, which reaches thicknesses of 10-15 centimetres (3.9-5.9 in) 70 kilometres (43 mi) east of Macá. Ash from past eruptions has been tentatively identified close to Cochrane Lake. A more recent eruption occurred from the Bahía Pérez cinder cone on the southwestern flank in 1560 ± 110 years.
In the early 20th century volcanic activity was observed at Ensenada Pérez, close to the southwestern flank of Macá.
^ abThe elevation given here is from SRTM data and independently confirmed by ASTER GDEM. Elevations around 3,000 m given by other authorities should be discounted. The contours around the summit are missing from official Chilean topographic mapping.
^Masiokas, Mariano H.; Rivera, Andrés; Espizua, Lydia E.; Villalba, Ricardo; Delgado, Silvia; Aravena, Juan Carlos (October 2009). "Glacier fluctuations in extratropical South America during the past 1000years". Palaeogeography, Palaeoclimatology, Palaeoecology. 281 (3-4): 242-268. doi:10.1016/j.palaeo.2009.08.006. hdl:10533/130935. ISSN0031-0182.
^ abD'Orazio, M; Innocenti, F; Manetti, P; Tamponi, M; Tonarini, S; González-Ferrán, O; Lahsen, A; Omarini, R (August 2003). "The Quaternary calc-alkaline volcanism of the Patagonian Andes close to the Chile triple junction: geochemistry and petrogenesis of volcanic rocks from the Cay and Maca volcanoes (~45°S, Chile)". Journal of South American Earth Sciences. 16 (4): 219-242. doi:10.1016/S0895-9811(03)00063-4. ISSN0895-9811.