The Westernmost Tethys Blog Geology mapping, basin analysis and 3D modeling

12/31/2020

Visiting the Monduver geologic dome

Filed under: Betics — Tags: , — messinianalicante @ 7:39 AM

Students of the third course of Geology of the Alicante University within the subject of Regional Geology: visit Jarafuel triassic section, Montealegre del Castillo triassic section, Sot de Chera Jurassic section, Valencia Albufera, and Monduver geologic dome.

The dome was investigated during the 70s as was drilled by the Jaraco borehole.

Alicante University students at the Moduver mountain. At the back the Cullera city.

11/27/2020

Mula field work

Filed under: Betics — Tags: , , — messinianalicante @ 11:30 AM

Students of the third course of Geology of the Alicante University within the subject of Mapping 2: visit North of Mula village. Working in the Malaguide complex non-metamorphic rocks.

The visit took place from October 21th until 24th of 2020 and the professor in charge was Manuel Martín-Martín.

Students of the Alicante University Geology Degree at Mula (Murcia) during the Covid-19 pandemic 2020.

09/08/2020

Paul Fallot visit to the Crevillente Sierra on 1931

Filed under: Betics — Tags: , , , — messinianalicante @ 9:24 AM

A compilation of geological landscape images of the Crevillente Sierra prior to the Spanish civil war found in  the historical archives have been made. Specifically from the authors Daniel Jiménez de Cisneros and Hervás, Bartolomé Darder Pericàs and Paul Fallot. Many different works have been carried out on the first two authors, while the stereographic photographs of the Paul Fallot Fund in the Archive of the University of Granada  are mentioned for the first time.

During the preparation of the Symposium Tribute to D. Daniel Jiménez de Cisneros y Hervás, in 2004, part of the glass gelatin silver emulsions in the Jimenez de Cisneros collection were cataloged and scanned.

Tables are made with the description of the glasses and some images that have been described in previous works are shown. The conservation of this material is worthwhile because you can see how the landscape of the mountains has changed from the beginning of the last century to the present day.

Stereoscopic pictures number 1849 of the Paul Fallot Fund of the Granada University. Numbered as 2452 by its author and described as: “Néogene Colina del Castillo S. de Crevillente P.F. 31” (Paul Fallot 1931). Bottom El Frare from el Pla taken on February 13th of 2004 by J. E. Tent-Manclus.

Cite as: Tent-Manclús, J. E., Lancis, C. y Baeza Carratalá, J. F. (2019): Las fotografías realizadas para el studio geológico de la Sierra de Crevillente a principios del siglo XX. In: Daniel Jiménez de Cisneros Centenario de sus trabajos sobre geología y paleontología de la Sierra de Crevillent (Belmonte Mas y Satorre Pérez, A. Eds.). Ayuntamiento de Crevillent. Concejalía de Cultura. 247-259.

12/17/2019

New model for the Betic Flysch Basin

Filed under: Betics,Campo de Gibraltar — Tags: , — messinianalicante @ 1:06 PM

The Flysch Complex extends, with equivalent stratigraphic and tectonic features, from the Betic Cordillera to the Rif, Argelian and Tunisian Tells, Sicily, Calabria and the southern-central Apennines. In the Betic Chain, it extends from the Campo de Gibraltar to the Vélez Rubio-Lorca region. This complex is a thrust-and-fold system (when structurally organised) or a tectonosedimentary mélange (when showing a rather chaotic structure). In the western Betic Cordillera, the Campo de Gibraltar Flysch Complex widely overthrusts the External Zones and, in turn, the Alborán Domain (Frontal Units in particular) thrusts onto it.

The Flysch Complex is mainly made of Lower Cretaceous to lower Burdigalian turbiditic siliciclastic (and subordinately carbonatic) sandstones interlayered with varicoloured clays. Since the latest Oligocene the successions show synorogenic character.

The Cretaceous successions of the Alborán (internal domain in the figure) domain record the post-rift evolution of the proximal to distal parts of a divergent Tethyan paleomargin, while those of the Campo de Gibraltar Flysch Complex record the evolution of the oceanic basin. The Alborán and the Campo de Gibraltar Flysch Complex domains were later transformed into a convergent continental margin (Oligocene to Early Miocene) that later evolved to a collisional setting (Middle to Late Miocene).

Paleogeographic and geodynamic evolutionary model of the Western Mediterranean area during the deposition and deformation of the syn–orogenic deposits of the Flysch units.

Cite as: Jabaloy Sánchez, A., Martín-Algarra, A., Padrón-Navarta, J.A., Martín-Martín, M., Gómez-Pugnaire, M.T., López Sánchez-Vizcaíno, V., Garrido, C.J., 2019. Lithological Successions of the Internal Zones and Flysch Trough Units of the Betic Chain, in: Quesada, C., Oliveira, J.T. (Eds.), The Geology of Iberia: A Geodynamic Approach: Volume 3: The Alpine Cycle. Springer International Publishing, Cham, pp. 377–432. https://doi.org/10.1007/978-3-030-11295-0_8

11/12/2019

Field trip to Granada

Filed under: Betics — Tags: , — messinianalicante @ 3:03 PM

Students of the third course of Geology of the Alicante University within the subject of Mapping 2: visit Benalúa in the Guadix basin.

The visit took place from October 23th until 26th of 2019 and the professor in charge was Manuel Martín-Martín.

 

10/25/2019

Tectonic breakup in the Eastern Betic zone

Six Paleogene-Aquitanian successions have been reconstructed in the Alicante area (eastern External Betic Zone). The lithofacies association evidences “catastrophic” syn-sedimentary tectonic processes consisting of slumps, mega-olisthostromes, “pillow-beds” and turbiditic deposits  (Figure 1).

Figure 1. Field photos of the main macro-tectofacies found in the study area (see text for details). (A) A typical Lower Eocene sequence of the Villafranqueza section. (B) Calcarenite turbidite with convolute bedding (Lower Eocene, Villafranqueza). (C) Two Oligocene carbonate turbiditic channelized bodies (Busot). (D) Oligocene conglomeratic bed with erosional base and reverse grading of clasts, typical of debris flow deposits (Busot). (E) Oligocene slumped level and pillow-beds (Busot). (F) Oligocene mega-flute casts indicating a northwestwards-directed paleocurrents (Relleu). (G) Oligocene pillow-beds (Relleu). (H) Oligocene mega-olisthostrome with huge blocks (Playa Nudista). (I) Slumped megabed (Playa Nudista).

This kind of sedimentation is related to unconformity surfaces delimiting sequence and para-sequence cycles in the stratigraphic record (Figure 2).

Figure 2. Unconformities, associated gaps of the Eocene and Oligocene-Miocene depositional sequences compared with the sedimentary cycles of (Vera, 2000). The figure shows a basement tectonic interpreted as folding during the Eocene and blind thrust during the Oligocene-Aquitanian. The different evolutionary trends are discussed in the text.

The data compiled have enabled the reconstruction of the Paleogene-Aquitanian paleogeographic and geodynamic evolution of this sector of the External Betics. During the Eocene the sedimentary basin is interpreted as a narrow trough affected by (growth) folding related to blind thrust faulting with a source area from the north-western margin, while the southeastern margin remained inactive. During the Oligocene-Aquitanian, the sourcing margin became the southeastern margin of the basin affected by a catastrophic tectonic (Figure 3).

Figure 3. Paleogeographic-geodynamic model of the Alicante Trough during Eocene and Oligocene-Miocene times.

The activity of the margins is identified from specific sediment sources area for the platform-slope-troughsystem and from tectofacies analysis. The southeastern South Iberian Margin is thought to be closer to the Internal Betic Zone, which was tectonically pushing towards the South Iberian Margin. This pushing could generate a lateral progressive elimination of subbetic paleogeographic domains in the eastern Betics (Figure 4).

Figure 4. Synthetic Oligocene-Aquitanian paleogeographic-geodynamic model proposed for the western.

This geodynamic frame could explain the development of such “catastrophic” tectono-sedimentary processes during the Late Oligocene-Early Miocene.

Cite as: Guerrera, F. and Martín-Martín, M. (2014): Paleogene-Aquitanian tectonic breakup in the Eastern External Betic Zone (Alicante, SE Spain). Revista de la Sociedad Geológica de España, 27(1): 271-285.

 

09/23/2019

Jiménez de Cisneros course field trip to the Crevillente Sierra

Filed under: Betics — Tags: , , — messinianalicante @ 11:03 AM

The field trip of the he summer school course of the University Miguel Hernandez  entitled “Jimenez de Cisneros, pioneer in the geological and paleontological investigation in the Southern Alicante” took place on september 5th, 2019.

The participants visit the Los Molinos educative center and then waked along the dirt road to the Pouet de la Mel spring.

The fist photography show the conductor of this field trip will be our collegue José Enrique Tent-Manclús teaching the finimessinian transgressive surface on the background of the picture.

The second fotography show the all participants in the field trip near the Pouet the la Mel spring with the Sierra de Crevillente Jurassic at the back.

More information about the Crevillente course here.

09/01/2019

Tethyan to Mediterranean Evolution

Filed under: Betics,Tethys — Tags: — messinianalicante @ 5:49 PM

Message from the Guest Editor

Dear Colleagues,

Several geological modeling studies on the geodynamic and paleogeographic Alpine (Eo-Alpine during the Cretaceous–Paleogene; Neo-Alpine during the Oligocene– Miocene) evolution of the Mediterranean have been published without consensus in the last four decades. Therefore, a Special Issue dedicated to “Tethayan to Mediterranean evolution” seems justified. Studies that consider the geodynamic and/or paleogeographic evolution of the entire Mediterranean area or a part of this area will be welcome. The proposal can be focused on stratigraphic, sedimentological, petrographic, or tectonic data, or geophysical interpretations and reconstructions based on principles of Plate Tectonics using GPlates or similar software. The papers that are published in this Special Issue can contribute to clarifying and updating the state of our knowledge about this controversial theme.

Message from the Editorial Board

T h e Journal of Marine Science and Engineering (JMSE; ISSN 2077-1312) is an international peer-reviewed open access journal which provides an advanced forum for studies related to marine science and engineering. The journal aims to provide scholarly research on a range of topics, including ocean engineering, chemical oceanography, physical oceanography, marine biology and marine geosciences. We invite you to publish in our journal sharing your important research findings with the global ocean community.

Open Access: free for readers, with article processing charges (APC) paid by authors or their institutions.

High visibility: Indexed in the Science Citation Index Expanded in Web of Science, in Inspec (IET) and in Scopus.

CiteScore (2018 Scopus data): 1.76, which equals rank 30/92 in ‘Ocean Engineering’, rank 105/288 in ‘Civil and Structural Engineering’ and rank 77/203 in ‘Water Science and Technology’.

 

Guest Editor:

Prof. Dr. Manuel Martín-Martín

Earth sciences and environment

Department (University of Alicante). Campus Universitario del San Vicente del Raspeig, AP- 99, 03080 Alicante, Spain

manuel.martin.m3@gmail.com

Deadline for manuscript submissions:

10 March 2020

08/27/2019

Paleogene sedimentary evolution of the Alicante Trough

Filed under: Betics — Tags: , , , , — messinianalicante @ 7:52 AM

A new work to illustrate a changes in the evolution of the Alicante Trough located to the southeastern part of the sudiberian paleomargin and north to the supposed elevated sea floor forming a marine platform.  Here the link to the work in Repository of the UA.

The Paleogene Alicante Trough of the South-Iberian Margin (External Betic Zone) consists of a narrow sedimentary basin that has active margins  located to the north-northwest (active mainly during the Eocene) and to the south-southeast (active during the Oligocene). Both margins, consisting of shallow unstable platforms, were the source areas for the external-platform slope (in the opposite margins) and deep-basin (in the middle) depositional realms. The southern margin, lost under the Mediterranean Sea, is recognized only by the reconstructed Oligocene slope sediments.

Geological sketch map of the Alicante region of the study area (External Betic Zone) within the Internal Prebetic (North-Northeast sector) and Intermediate sub-Domains (south-southwest sector).

The eight successions studied, on opposites external-platform-slope margins and the deep within the central part of the basin, lead us to divide the basin into two depositional realms: the subsident Western Depositional Area (WDA) and the not subsident Eastern Depositional Area (EDA). This study has also enabled us to divide the infilling of the basin into two depositional sequences: Eocene p.p. (EDS) and Oligocene p.p. (ODS) in age, respectively, bound by two sequence boundaries (unconformities) at the Early Eocene (P6 zone) and Early Oligocene (P19 zone). The EDSand ODSare comprised of turbiditic and olisthostromic deposits and frequently slumps, evidencing an active tectonic in the margin-basin system.

Stratigraphy, correlation, sampling localization and main sedimentary cycles recognized (Eocene p.p. and Oligocene p.p.) of the studied successions in the Western (WDA) and Eastern EDA) Depositional Areas.

 

Chronostragraphy of the studied successions.

The correlation of the Paleogene sedimentary reconstructed in the Alicante Trough with other four synthetic successions throughout the External (three in the Subbetic Domain) and one in the Internal Betic Zone indicate a Paleogene generalised deformational framework.

Main Eocene and Oligocene sedimentary realms and location of the studied successions in the Internal Prebetic and Intermediate sub-Domains.

Sedimentary record and new sequential stratigraphy in the study area.

In addition, this evolution is contemporaneous to the Pyrenean, Iberian and the Nevado-Filabride Alpine deformation. The Paleogene tectonic recognised in the External Betic Zone is younger since the main orogenic deformation took place in the late Burdigalian to early Tortonian.

Correlation among synthetic Paleogene successions and main unconformities in the Betic Chain. Key: ALI, Alicante succession (Internal Prebetic-Intermediate sub-Domains); SB, Bullas succession, (Murcia province, Middle Subbetic sub-Domain); SPM, Piñar-Moreda succession, (Granada province, Middle Subbetic sub-Domain); SHC, Malaga succession (High Chain, Internal Subbetic sub-Domain); MSE, Sierra Espuña succession (Murcia province, Internal Betic Zones, Malaguide Complex).

The origin of these early tectonics is discussed in relation to the Nevado-Filabride Alpine deformation.

Palaeogeography and geodynamic model of the Western Tethys during Late Cretaceous and Late Oligocene. Numbers 1 to 5 indicate the location of the correlated successions.

Cite as: Guerrera, F., Estévez, A., López-Arcos, M., Martín-Martín, M., Martín-Pérez, J.A., Serrano, F. (2006): Paleogene tectono-sedimentary evolution of the Alicante Trough (External Betic Zone, SE Spain) and its bearing on the timing of the deformation of the South-Iberian Margin. Geodinamica Acta, 19 (2): 87-101. doi: 10.3166/ga.19.87-101

07/31/2019

8th International Brachiopod Congress

Filed under: Betics — Tags: , , — messinianalicante @ 8:34 PM

The 8th International Brachiopod Congress was held at the University of Milan (Università deli Studi di Milano) and organized by a committee chaired by Lucia Angiolini from Milan and Renato Posenato from Ferrara.

A four-day pre-congress fieldtrip was proposed to Spain with a detailed guidebook published by García Joral et al., (2018). The fieldtrip to Spain started on 6th September 2018 in Madrid, from where participants headed northwards to Aragon, where in the Iberian Ranges two days were devoted to Jurassic and one to the Palaeozoic (Ordovician, Silurian, and Devonian). The last day took the participants to the Betic Mountains near Alicante, where we admired the Liassic faunas of the Mediterranean province.

Pictures of the congress and the fieldtrips can be seen in:

Halamski A. T., 2019. Eighth International Brachiopod Congress Milan, Italy, 11th-14th September, 2018. http://paleopolis.rediris.es/BrachNet/REF/Pub/halamski-2019.html, 9 p

Fieldtrip to Spain, 9th September, 2018. José Enrique Tent-Manclús explaining the geology of the Betic Mountains. Liassic, Cerro de la Cruz section, Reclot Mountain Range near Alicante. Photo by A.T. Halamski.

Reference:

García-Joral F., Villas E. & Baeza-Carratalá J.F. (eds), 2018. 8th International Brachiopod Congress Field Guide. E1: Paleozoic and Mesozoic brachiopods of East Spain, ii + 76 pp. Workcenter Servicios Globales de Documentación, Madrid.

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