Stratigraphically, Este Norte lava disperse ‘s the youngest lava flow on the brand new north side and you will Ceboruco lava flow on new southern flank (Fig. 1), perhaps not considering new historic 1870 eruption. Simply legends can be found about eruptions in advance of 1528, that have been passed on orally from one generation to a higher and was basically fundamentally in writing by the Spanish chroniclers, but hence kissing specific eruption times. g. Tello 1968; Mota y Padilla 1973; de- Ciudad Real 1976) says to a narrative on the a town at the volcano flank and that are tucked because of the a great lava circulate once the society got sinned.
Whenever you are Nelson ( 1980) demonstrated the newest Ceboruco move just like the a blocky lava disperse, i define it rather because an Aa-type lava circulate, because of the body morphology, thickness in addition to presence off basal and you may greatest breccias and you may good big, thick, main part.
For the properties, including little or no vegetation coverage, black the color as well as the rugged body of the lava stops, new Ceboruco lava disperse will has been confounded to your historical 1870 lava flow (e.grams. Thorpe & Francis 1975; Michalk ainsi que al. 2008), and that actually is characterized by a great deal more flowers. Ceboruco lava flow was andesitic and contains a beneficial porphyritic texture, indicating large plagioclase phenocrystals and you can plentiful vesicles regarding the top pieces of move.
dos.dos 1870–75 eruption
The only real historic emergence recorded in detail become new 1870 March 23 and you can survived up until 1875, whilst the associated dacitic lava circulate averted moving sideways inside 1872 already (Garcia 1875; Iglesias et al. 1877).