La Formación Matzitzi (Pérmico), se localiza en el sur del Estado de Puebla y constituye uno de los afloramientos más extensos de las pocas unidades paleozoicas que afloran en el sur de México.
Sus rocas fueron reconocidas desde 1896 por Aguilera y desde entonces se ha resaltado su importancia dentro de la paleobotánica, ya que contiene una diversa flora fósil.
A common form of metamorphism is called Barrovian and a neat explanation of it came from a 1984 paper that has since been cited 1489 times.
In it, England and Thompson performed some simple modelling of crust affected a collision between two continental plates.
Lyell expressed this as Uniformitarianism, popularising a concept first expressed by James Hutton.
The most dramatic example involves vaporised dinosaurs, but the trend is seen even in the less glamorous world of metamorphism.The Eastern Anatolia region is one of the best examples of a continental collision zone in the world. 2), indicating that the lithosphere is still being actively deformed as a result of diffuse north-south shortening. Tendurek) in the region, corresponding basically to central eruption sites (Figs. The erupted volumes may represent only a small fraction of the melt generated beneath the region, because a greater proportion presumably was emplaced deeper in the crust as plutonic intrusions. Distribution of the oldest radiometric ages of the volcanic units. This indicates that an almost normal-thickness crust overlies an extremely thin mantle lithosphere or perhaps it directly overlies the asthenosphere (see also the cross section in Fig. Thick, dotted dark-blue lines represent the northern and southern borders of the Eastern Anatolian Accretionary Complex (also see Fig. Note that areas of inferred complete lithospheric detachment almost exactly coincide with the extent of the Eastern Anatolian Accretionary Complex (i.e. , suggesting that the temperature of the mantle significantly increased beneath this area.It also comprises one of the high plateaus of the Alpine-Himalaya mountain belt with an average elevation of ~2 km above sea level (Fig. This implies that the collision is still in progress. Thus, there must have been enormous magma generation beneath the whole region related to the collision of Arabia with Eurasia. I: Rhodope-Pontide fragment, II: Northwest Iranian fragment, III: Eastern Anatolian Accretionary Complex (EAAC), IV: Bitlis-Poturge Massif, V: Arabian foreland. Topographic map of the Eastern Anatolia Collision Zone (EACZ) over which the main tectonic units as well as collision-related volcanics are superimposed. What all these findings may imply is that a huge portion of the mantle lithosphere was lost beneath Eastern Anatolia. Bernard, A., Munschy, M., Rotstein, Y.&Sauter, D., 2005. Borissova, I., Moore, A., Sayers, J., Parums, R., Coffin, M. Geological framework of the Kerguelen Plateau and adjacent ocean basins, Geoscience Australia Record 2002/05. At present, Volcanism migrated to the south/southeast over time. lavas and pyroclastic units) reaching over 1 km in thickness in places were erupted onto the surface between 8 and 1.5 Ma, forming volcano-sedimentary successions, and covering almost two-thirds of the region. They are likely to have been derived from an enriched mantle source containing a distinct subduction signature (SC) (Figs. This signature decreases to the south and diminishes around Mus-Nemrut-Tendurek volcanoes (Figs.