Английская Википедия:Chillahuita

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Шаблон:Infobox mountain Chillahuita is a dacitic lava dome in northern Chile. It may have formed after the Pleistocene,[1] although argon-argon dating on amphibole has indicated an age of 370,000 ± 40,000 years;[2] another age estimate is 107,800 ± 6,400 years.[3] It has an altitude of about Шаблон:Convert. It formed in a single non-explosive eruption.[4]

The flow moved northward and eastward from the vent over a terrain with slopes of 3-4°. The flow has a surface area of Шаблон:Convert with a flat circular surface containing flow folds. Steep Шаблон:Convert high flanks limit the flow, which has a total volume of Шаблон:Convert. It is surrounded by a pumice deposit probably from the San Pedro volcano to the northwest.[4]

The eruption of the Chillahuita dome involved the entry of andesitic magma into a pre-existent shallow reservoir.[3] It appears to have been controlled by local fault systems associated with the Altiplano-Puna volcanic complex, which also has geochemical similarity with Chillahuita lavas.[4]

See also

References

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