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Ítem Jurassic Evolution of the Northwestern Corner of Gondwana: Present Knowledge and Future Challenges in Studying Colombian Jurassic Rocks(Publicaciones Especiales Geológicas-Servicio Geológico Colombiano, 2020-11-27) Bayona, Germán; Bustamante, C.; Nova, Giovanny; Salazar Franco, Ana MilenaÍtem Late Cenozoic to Modern-Day Volcanism in the Northern Andes: A Geochronological, Petrographical, and Geochemical Review(2018-08-01) Marín, María IsabelÍtem Two Cretaceous Subduction Events in the Central Cordillera: Insights from the High P–Low T Metamorphism(Publicaciones Especiales Geológicas-Servicio Geológico Colombiano, 2020-11-27) Bustamante, C.; Bustamante, A.Ítem Geomorphological Characteristics of the Ruiz Volcano and Surroundings(2015-08-01) Tavera, Miguel AngelÍtem large magnitude late holocene seismic activity in the Pereira - Armenia region, Colombia(The Geological Society of America, 2011-01-01) Lalinde, Claudia Patricia; Toro, G.; Velásquez, A. A.; Audermad, Franck A.The Pereira-Armenia region, located west of the Colombian Central Cordillera, is crosscut by the Romeral fault system, which consists of an active north-south?trending, left-lateral, strike-slip fault system with a secondary thrust componentÍtem Paleogene magmatism of the Maracaibo Block and its tectonic significance(Springer Verlag, 2019-01-01) Duque-Trujillo J.F.; Orozco-Esquivel T.; Sánchez C.J.; Cárdenas-Rozo A.L.One of the main northern South American geological conundrums has been to establish the tectonic relationship between Caribbean and South American plates during Mesozoic and Cenozoic times. Based on the petrogenetic interpretation of magmatic bodies within the Maracaibo block, we suggest an interplay between subduction and overthrusting tectonics in the northern part of South America during the Cenozoic. Our data show that the subduction of the Caribbean Plate beneath the South American Plate started around 65 million years ago, as is evidenced by the presence of trondhjemitic intrusions in the Santa Marta Province. Then, after a ca. 5-million-year magmatic gap, the evolution of this subduction system allowed the formation of a magmatic arc represented by the calc-alkaline Santa Marta Batholith (~56–49 Ma) and Parashi Pluton (51–47 Ma). For the interval between 50 and 25 million years, our data and compiled data point to a reduction in the tectonic activity, which is supported by relatively slow rates of cooling and uplifting in the Maracaibo block. Finally, for the period since the early Miocene, the reported uplift data, subsidence rates, and stratigraphic discordances indicate a differential uplift of the Maracaibo block, decreasing from the northwestern tip (Sierra Nevada de Santa Marta) toward the southeast (Merida Andes) and suggesting that this tectonic “reactivation” is the result of dominant overthrusting tectonics. © Springer Nature Switzerland AG 2019.Ítem Geomorphological characteristics of the ruiz volcano and surroundings(Springer International Publishing, 2015-01-01) Hermelin, M.; Toro, G.; Mendez, R; Tavera, Miguel AngelLandforms related to the Ruiz Volcano, the northernmost active volcano in South America, are both of volcanic and glacial origins. A brief historical account includes several eruptions and culminates with the catastrophic one which occurred in November 13th, 1985. A description of the geological evolution of the area is complemented by an itinerary which will permit the observation of the more important landforms. © Springer International Publishing Switzerland 2016. All rights reserved.Ítem Late Cenozoic To Modern- Day Volcanism in The Northern Andes: A Geochronological(2019-01-01) MARIN, MARIA ISABEL; Leal, Hildebrandon; Bernet, Matthias; Mesa-García J.The Northern Andean Block is the result of complex tectonic interaction between the Farallon-Nazca, South American, and Caribbean Plates. Abundant late Cenozoic volcanism (and associated hypabyssal porphyritic plutonism), beginning in the mid- to late MioÍtem Late Cenozoic to modern-day volcanism in the Northern Andes: A geochronological, petrographical, and geochemical review(Springer Verlag, 2019-01-01) Marín-Cerón M.I.; Leal-Mejía H.; Bernet M.; Mesa-García J.The Northern Andean Block is the result of complex tectonic interaction between the Farallon-Nazca, South American, and Caribbean Plates. Abundant late Cenozoic volcanism (and associated hypabyssal porphyritic plutonism), beginning in the mid- to late Miocene, is the result of subduction-related mantle-derived magmatic activity, superimposed upon a compositionally varied and structurally complex basement during the late stages of the Northern Andean orogeny. Tectonic consolidation and subduction of the segmented Nazca Plate during the late Miocene-Pliocene led to conformation of the modern-day Colombian segment of the Northern Andean Volcanic Zone. The Colombian arc segment represents the northernmost expression of subduction-related volcanism within South America’s Andean Cordillera. © Springer Nature Switzerland AG 2019.Ítem The guamuéz (La Cocha) lake(Springer International Publishing, 2015-01-01) Duque-Trujillo J.F.; Hermelin, M.; Toro, G.Ítem The tatacoa desert(Springer International Publishing, 2015-01-01) Hermelin, M.The Desierto de la Tatacoa (the Tatacoa Desert), an extensive badland area related to dry climatic conditions due to a mountain barrier, lies on the eastern shore of the Magdalena River, 30 km north of Neiva, the capital of the Department (State) of Huila. It has been carved on the sub-horizontal strata of the Miocene La Victoria, Villavieja, and Gigante Formations, locally covered by Quaternary deposits. Detailed stratigraphic descriptions are available due to the presence of abundant vertebrate fossils in some of the layers. The present landscape offers a variety of landforms as badlands, pinnacles, and isolated erosional remnants forming curious figures produced by surface erosion and the different lithologies affected by the processes. © Springer International Publishing Switzerland 2016. All rights reserved.Ítem Inselbergs near medellín(Springer International Publishing, 2015-01-01) García, C.; Hermelin, M.The northernmost part of the Central Cordillera is characterized by plateaus stretching from 1900 to 2700 m a.s.l. which were formed by erosion before the uplift of the cordillera, their different altitudes is an evidence of the successive pulses which were separated by quiet periods. One of the results of these tranquil epochs was the appearance of bornhardts at different altitude. Carved during Miocene and Pliocene in the Antioquian Batholith, a granodiorite intrusive which crystallized in the Upper Cretaceous. Main inselbergs are the Peñol de Guatapé (1900 m s.a.l.) the Tabor Mount (1880 m a.s.l.) in San Carlos and the Peñol de Entrerrios (2300 m a.s.l.). © Springer International Publishing Switzerland 2016. All rights reserved.Ítem Communicating impact risk to the public(Springer Berlin Heidelberg, 2007-01-01) Hermelin, M.The first conscious recollection I have from my childhood was an aerial bombing. It was a beautiful summer afternoon in June 1940, in a small French village east of Paris. Fortunately no one in my family was hurt. During the following four years, with other children of my age, I was often pulled out from home and school by siren whistles announcing airplanes approaching. In none of these cases was there panic: the adults and children had been trained to react instantaneously and to seek refuge in vaulted cellars or in trenches. © 2007 Springer-Verlag Berlin Heidelberg.Ítem Geomorphological features of the Galeras Volcani Complex(Springer International Publishing, 2015-01-01) Calvache, Marta; Duque-Trujillo J.F.Ítem Paleogene Magmatism of the Maracaibo Block and its Tectonic SIgnificance(2019-08-06) Duque-Trujillo J.; orozco, teresa; Sanchez, Carlos Javier; Cárdenas-Rozo A.L.One of the main northern South American geological conundrums has been to establish the tectonic relationship between Caribbean and South American plates during Mesozoic and Cenozoic times. Based on the petrogenetic interpretation of magmatic bodies withi