Lahar in the Montegrande ravine, Volcán de Colima, real-time monitoring image from station of the Centro de Geociencias de la Universidad Nacional Autónoma de México, date 2018-10-03, GMT 23:53:55. See the related article by Martínez-Valdés et al. in this issue.

Longitudinal thin section of the new coral species Rayaphyllia atheca, holotype IGM 9204. 1, from the San Juan Raya Formation (Lower Cretaceous), Puebla, Mexico. Scale bar = 1 mm. See related article by Hannes Löser in this issue.

Intermediate-depth seismicity in southern Mexico. The orange symbols represent earthquakes with depths between 50 and 10 km, while the yellow ones are earthquakes with depths greater than 100 km. In this area, hypocentral depths never exceed 300 km. Also, notice that in the westernmost part of the map, the seismicity no longer follows the pattern of being perpendicular to the trench. See related article by Guzmán-Speziale in the special section of this issue.

Stalagmites collapsed by an earthquake in the San Jerónimo underground river, inside the Cacahuamilpa Grottoes, Taxco, Guerrero, Mexico. At the center of the photograph is Dr. Víctor Hugo Garduño-Monroy, in whose memory the third and last part of the Special Section “The Geology of Michoacán” is published in this issue.

Cover image:

Clastic deposits covering volcanic deposits of the Aguajito Caldera, Baja California Sur, Mexico. V´íctor Hugo Garduño-Monroy at the center of the image.

Special Section guest editors:

Isabel Israde-Alcántara and José Luis Macías

Cover image

View of a trench performed on the Jarácuaro paleo island, south west margin of Patzcuaro lake, showing lacustrine sediments (diatomites and clays) interlayered with volcanic deposits. Different deformation phases are recorded as result of phenomena of  uplifting and landslides of volcanic edifices as well of active faulting associate with the E-W regional fault system. This image justify the importance of the studies carried out by Víctor Hugo Garduño Monroy (on the right) to understand this factors in the lacustrine basin evolution and paleoenvironmental reconstruction in Mexico. To the left, Miguel Rodríguez Pascua.