[5] It has a summit elevation of approximately 2,300 m above sea level[1][2] and features glaciers[6] that in 2011 covered an area of 27.62 square kilometres (10.66 sq mi).

[7] The edifice is partially eroded[8] and a sector collapse is probably the origin of a large steep sided depression in the summit area.

[9] Pyroclastic cones with associated lava flows are found on its southwestern flank[10] but also on the other slopes of the volcano, as far down as sea level and in the Bahia Aysen.

[5] 1,440 ± 40 calibrated radiocarbon years ago a moderate explosive eruption deposited the MAC1 tephra,[5] which reaches thicknesses of 10–15 centimetres (3.9–5.9 in) 70 kilometres (43 mi) east of Macá.

[3] In the early 20th century volcanic activity was observed at Ensenada Pérez, close to the southwestern flank of Macá.