Cover: granitic boulder exposing well-developed tafoni on top of an inselberg, in the municipality of Quixeramobim, Ceará, territory of the Sertão Monumental Geopark, Brazil.
Author of the photo: Alexandre Pinheiro de Alcântara, graduated in Geography by the Federal Institute of Education, campus Quixadá, Ceará, and professor at the Ceará State Education Network.