Alejandro Rodriguez-Gonzalez

• University of Las Palmas de Gran Canaria

Damage and destruction caused by the 2021 eruption of the Tajogaite volcano on La Palma was unprecedented relative to other historical eruptions of the last century (1909, 1949, 1971, 2011) in the Canary Islands. The devastation caused by the eruption was not a result of eruption magnitude, which was only marginally larger than other historical eve...

This dataset collects the petrographic description of 64 lava flow and pyroclast samples from the Holocene eruptions investigated on the island of El Hierro (Canary Islands, Spain) in the LAJIAL Project (PGC2018-101027-B-I00). The project was developed at the Univer- sity of Las Palmas de Gran Canaria, the GEO3BCN (CSIC), the University of Barcelon...

This dataset includes 28 photographs illustrating the stratigraphic relationships among the 27 eruptions out of 42 Holocene eruptions on the island of El Hierro (Canary Islands), investigated within the LAJIAL Project (PGC2018-101027-B-I00). The Project was developed at the University of Las Palmas de Gran Canaria, the GEO3BCN (CSIC), the Universit...

Damage and destruction caused by the 2021 eruption of the Tajogaite volcano on La Palma was unprecedented relative to other historical eruptions of the last century (1909, 1949, 1971, 2011) in the Canary Islands. The devastation caused by the eruption was not a result of eruption magnitude, which was only marginally larger than other historical eve...

We explain, through a collection of ten panels distribuited in five thematic blocks, the geological history of the El Hierro and La Palma islands in the framework of intraplate volcanic islands evolution. In the first two panels we explain how the Canary Islands were formed and evolved, and the birth of El Hierro, the youngest island of the archipe...

Almost exactly half a century after the eruption of the Teneguía Volcano on La Palma (26 October to 28 November 1971), a new eruption occurred on the island and lasted for 85 days from 19 September until 13 December 2021. This new eruption opened a volcanic vent complex on the western flank of the Cumbre Vieja rift zone, the N‐S elongated polygenet...

Almost exactly half a century after the eruption of the Teneguía Volcano on La Palma (26 October to 28 November 1971), a new eruption occurred on the island and lasted for 85 days from 19 September until 13 December 2021. This new eruption opened a volcanic vent complex on the western flank of the Cumbre Vieja rift zone, the N-S elongated polygenet...

In this work the development and the results of a practical work are shown. The practical work has been designed for the teaching of organic chemistry in a high school teaching course. The selected theme is related to the perfume industry. Its main goal was related to promoting the study of the chemical discipline. This work was carried out within...

Gran Canaria, like most of the Canary Islands, shows evidence for young basaltic volcanism in the form of cinder cones and valley‐hugging lava flows. These landforms were of no particular use to the aboriginal population, nor to the subsequent Spanish settlers, and young lava flows and lava fields are still referred to as ‘malpaís’ (badlands) in th...

p>La quebrada de Las Papas fue colmatada por flujos piroclásticos producto de la última erupción del Complejo Volcánico de Cerro Blanco (ca.4200 años AP) localizado en la Cordillera de San Buenaventura (4000 msnm). Cerca del pueblo de Las Papas se emplazan tres conjuntos de rocas grabadas a 2700 msnm y 20 km al sur del foco de la erupción. En los 2...

Marine conglomerates at high elevation on the flanks of ocean islands are usually interpreted as evidence of mega-tsunamis generated by volcano flank collapses, although their origin is sometimes debated (elevated littorals vs. tsunami). In this review, we introduce case studies of well-documented examples of tsunami conglomerates in Hawaii (Pacifi...

Volcanic pyroclasts of small size, such as lapilli and small pumice stones, are widely used in agriculture, gardening, and for pot plants as natural inorganic mulch. The technique of using pyroclasts to enhance topsoil stems from the eighteenth century, and specifically from the ad 1730–1736 eruption on Lanzarote. Critical observations on plant dev...

The most common volcanic landforms are described. The introduction of Geographic Information Systems (GIS) has revolutionized their morphometric modeling, making it more effective. The resulting information is essential in order to reconstruct the geological history of a volcanic area and the processes involved. The results are of great interest fo...

Forty years after the eruption of the Teneguía volcano on La Palma, 1971, the last volcanic event in the Canary Islands, a submarine eruption took place in 2011 off-shore El Hierro, the smallest and youngest island of the archipelago. In this paper, we review the periods of seismic unrest leading up to the 2011–2012 El Hierro eruption, the timeline...

In recent months the media have drawn attention to the Cape Verde archipelago, with particular focus on the island of Fogo, the only island presently active and with an eruption that began on 23 November 2014, finally ceasing on 7 February 2015. The Monte Amarelo conical shield forms most of the 476 km2 almost circular island of Fogo. After attaini...

222Rn has been detected in 28 groundwater samples from the northeast of Gran Canaria (Canary Islands, Spain) utilizing a closed loop system consisting of an AlphaGUARD monitor that measures radon activity concentration in the air by means of an ionization chamber, and an AquaKIT set that transfers dissolved radon in the water samples to the air wit...

We present new data about a major eruption-spreading approx. 110 km3 ashes over 440.000 km2-long thought to have occurred around 4200 years ago in the Cerro Blanco Volcanic Complex (CBVC) in the Central Andes of NW Argentina (Southern Puna, 26 • 45' S, 67 • 45' W). This eruption may be the biggest during the past five millennia in the Central Volca...

Berrazales carbonate spring deposit, constituted mainly by cascade-like morphologies, is located in the northwest of Gran Canaria Island. This carbonate deposit, classified as travertine from geochemical point of view and as tufa from textural point of view, overlies volcanic lavas (basanite) with around 2700-3100 years old. The deposit is made of...

Origin and palaeo-environmental significance of the Berrazales carbonate spring deposit, North of Gran Canaria Island, Spain

The Jaramillo subchron was first evidenced in 1966 (Doell and Dalrymple) through the Rhyolotic domes of the Valles Caldera, New Mexico (USA). 40Ar/39Ar studies achieved by Spell et McDougall (1992), Spell et Harrison (1993), Izett and Obradovich (1994) and Singer et al. (1994) defined the base of this subchron at 1053±6 ka, and the ceiling at 986±5...

A sequence of lava flows has been emplaced during the transition between the Jaramillo subchron and the Matuyama chron in Tenerife (Canary island). This sequence is located along the flank of the collapse of Güimar, in the south central part of the island. It includes 26 flows from the full normal polarity to the full reverse polarity. On the basis...

Teide volcano, nested inside the Las Cañadas Caldera, offers visitors a view on one of the most dramatic landscapes in the world. This is due to a combination of a long volcanic history that ranges from the Quaternary Las Cañadas volcano to the historical Teide lava flows, as well as to the particular climatic and geomorphological setting in which...

The wide variety of volcanic products composing the Teide Volcanic Complex (TVC) reflects an unusual assemblage of eruptive styles, with a wide range of phenomena represented and only plinian and phreato-plinian styles truly lacking. This diversity is due to spatial and temporal variations in magma composition (mafic magmas of the rift zones and fe...

The island of Tenerife displays contrasted densities of population, from the densely occupied coastal zones (including tourist resorts, airport, energy facilities, etc.) to the sparsely populated forests and mountainous highlands, where most of the recent volcanic events are located. Considering the low frequency of historical eruptions (compared t...

Forty years after the Teneguía Volcano (La Palma, 1971), a submarine eruption took place off the town of La Restinga, south of El Hierro, the smallest and youngest island of the Canarian Archipelago. Precursors allowed an early detection of the event and its approximate location, suggesting it was submarine. Uncertainties derived from insufficient...

The northeast rift zone of Tenerife presents a superb opportunity to study the entire cycle of activity of an oceanic rift zone. Field geology, isotopic dating, and magnetic stratigraphy provide a reliable temporal and spatial framework for the evolution of the NE rift zone, which includes a period of very fast growth toward instability (between ca...

Previous published data, combined with our results of 13 new radiocarbon ages and extensive geological fieldwork, indicate that during the past 11 ka 24 monogenetic basaltic eruptions occurred in the north sector of Gran Canaria. These eruptions can be grouped into three periods of eruptive activity: 1900–3200 14C a BP; 5700–6000 14C a BP; and an o...

We studied a large debris-avalanche deposit of Pleistocene age in the Tenteniguada Basin, Gran Canaria Island, Spain. This deposit, which is well preserved because it is mostly covered by basanite lava flows, has distinctive matrix and block facies, hummocky topography and internal structures typical of debris avalanches. However, neither synerupti...

Several islands in the Canarian archipelago show marine deposits with identical fossil faunas, which are generally assigned to different glacioeustatic marine episodes: mainly Pleistocene episodes in Lanzarote and Fuerteventura, and Mio–Pliocene ones in Gran Canaria.Three fossil species (Saccostrea chili, Nerita emiliana and Strombus coronatus) cha...

Mecanografiado Tesis (Ing. Civil)-- Universidad de Los Andes, Facultad de Ingeniería, Escuela de Ingeniería Civil, Mérida, 1955

Mecanografiado Tesis (Arquitecto)-- Universidad de Los Andes. Facultad de Arquitectura y Arte, Mérida Incluye bibliografía

Holocene volcanism in Gran Canaria (Canary Islands) is characterized by apparently NW-SE lineations of strombolian cones from which lava flows were quickly channeled to the bottom of the barrancos. This geomorphological feature differentiates the Holocene volcanism from older volcanic activity (>20 ky) on the island. The combined use of radiometric...

Incluye bibliografía e índice