[3] Cerro Azul is at the edge of the upwelling with steep drop offs in the ocean to the West, while the sea is shallower to the east of Isabela Island.

[4] Cerro Azul is one of six coalescing volcanoes on Isabela Island: Ecuador, Wolf, Darwin, Alcedo, and Sierra Negra.

[5] Historical eruptions date back to 1932, but the volcano has had a number of active periods since then in 1940, 1943,1949, 1951, 1959, 1968, 1979, 1998 and most recently in 2008.

[2] Analysis of the lavas on Cerro Azul show a range of tholeiitic to alkalic basalts that are unlike the neighboring Sierra Negra or Alcedo volcanoes.

This subspecies is dome-shelled and has an overlapping range with the species on the neighboring Sierra Negra volcano, Geochelone guentheri, which is a saddle-backed tortoise.