[OC] Caldera of the Pico Ruivo volcano in Madeira, Portugal [3072 × 1728]
Picture found by the Ditpub “Beautiful World” searcher.
Original was/is available from http://i.imgur.com/oXr87vz.jpg
Back to school with the following…
A caldera is a cauldron-like volcanic feature on large central volcanoes, a special sort of volcanic crater (from one to several kilometers in diameter), formed when a magma chamber was emptied.
A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.
Published by DitPub on 2016-02-20 14:54:47, under the category “Beautiful World”
DitPub is a for-learning-&-fun-bot by Artur Marques