Oriol Riba

Universidad Complutense de Madrid

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Pere Anadón

Geociencias Barcelona

Ferrán Colombo Piñol

Universitat de Barcelona

M. Marzo

Fundación Universitaria Compensar

Salvador Reguant

Universitat de Barcelona

María José Jurado

Consejo Superior de Investigaciones Científicas

Jaume Vergés

Geociencias Barcelona

L. Rivero

Universitat de Barcelona

Mariano Marzo

Universitat de Barcelona

Alberto Sáez

Universitat de Barcelona

Lluı́s Cabrera

Universitat de Barcelona

Cooperative Institutions

Universitat de Barcelona

Geociencias Barcelona

Consejo Superior de Investigaciones Científicas

Universitat Jaume I

National Research Council

Consejo Nacional de Investigaciones Científicas y Técnicas

Universitat Politècnica de Catalunya

Universidad Complutense de Madrid

Universitat Autònoma de Barcelona

New Huadu Business School

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Fan-delta deposits and syntectonic unconformities in alluvial fan conglomerates of the Ebro basin

Pere Anadón M. Marzo Oriol Riba Alberto Sáez

Alluvial fan

Conglomerate

Pebble

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Citations (4)

Syntectonic Intraformational Unconformities in Alluvial Fan Deposits, Eastern Ebro Basin Margins (NE Spain)

Pere Anadón Lluı́s Cabrera Ferrán Colombo Piñol Mariano Marzo Oriol Riba

Several types of syntectonic intraformational unconformities can be observed in the Palaeogene alluvial fan conglomerates deposited in the eastern Ebro Basin margins. Progressive unconformities are the most common but unconformities displayed by supratenuous folds are also observed. We describe syntectonic intraformational unconformities related to the following structural settings: (a) Nappe fronts (i.e. Cadí Nappe in the southern Pyrenees). Development and deformation of the progressive unconformities are related to successive movements during the late phases of floor thrust emergence. (b) Uplifting structures related to the basement-involved strike-slip fault system of the Catalan Coastal Range: monoclinal folds linked to uplifting blocks and stretched cover folds. The successive motion of basement faults located more and more basinward resulted in a shifting of the basin boundary in some sectors. Syntectonic intraformational unconformities developed in the alluvial fan sequences which accumulated along each new basin boundary. (c) Folds affecting a thick Mesozoic cover (Linking Zone). In this case, folding during sedimentation produced progressive unconformities in the Tertiary strata at the fold limbs. Supratenuous synclines affecting the Tertiary syntectonic deposits developed between the anticlines. Progressive syntectonic unconformities recognized in the structural settings mentioned above show broadly similar geometric features. The syntectonic intraformational unconformities are related to uplifting structures such as nappe fronts, monoclinal folds, overfolds and limited overthrusts. The spatial and temporal distribution of the syntectonic intraformational unconformities record the diachronous development of these structures along the margins of the eastern Ebro Basin.

Syncline

Conglomerate

Basement

Paleogene

Alluvial fan

10.1002/9781444303810.ch14

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Citations (126)

Fan-delta deposits and syntectonic unconformities in alluvial fan conglomerates of the Ebro basin : Guidebook series of the 4th International Conference on Fluvial Sedimentology

Pere Anadón M. Marzo Oriol Riba Alejandro Antonio Játiva Sáez Jaume Vergés

Alluvial fan

Conglomerate

Mineral resource classification

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Citations (1)

Un nombre mal empleado: Los Montes Universales

Estudios Geográficos (1956)

Joan Vilà i Valentí Oriol Riba

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Citations (0)

The Rioja Area (westernmost Ebro basin): a ramp valley with neighbouring piggybacks

Cambridge University Press eBooks (1996)

María José Jurado Oriol Riba

This study deals with the evolution of the Rioja area in structural and stratigraphic terms. This area is located at the western end of the Ebro basin. Field data, particularliy subsurface data from hydrocarbon exploration activity, allow a new integrated approach. The Rioja area has experienced a particular evolution at least since the Mesozoic, and can be differentiated from neighbouring Ebro basin domains. Major thrusting along the northern (Cantabrian Chain) and southern (Iberian Chain) margins of the Rioja basin lead to a reduction in the extent of the original basin of approximately 70%. Syntectonic subsidence, coeval with the major thrusting on both margins, took place during Tertiary times. On the northern thrusted domain, piggy-back basins developed. Diapirism is also a significant feature of the Cantabrian region.

Feature (linguistics)

10.1017/cbo9780511524851.026

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Citations (11)

Folding Mechanisms in a Fault-propagation Fold Inferred from the Analysis of Unconformity Angles<subtitle>The Sant Llorenç Growth Structure (Pyrenees, Spain)</subtitle>

American Association of Petroleum Geologists eBooks (2011)

Juan Luis Alonso Alonso Ferrán Colombo Piñol Oriol Riba

This chapter shows, from the theoretical point of view, that growth strata geometries above angular unconformities depend on the modification of initial unconformity angles due to different folding mechanisms operating in underlying layers. This theory is applied to the Sant Llorenç de Morunys growth structure, where the analysis of the unconformity angles shows that classic folding mechanisms, such as layer-parallel simple shear in both angular and curved folds, and tangential-longitudinal strain operated in the forelimb of a fault-propagation fold. These folding mechanisms, inferred from changes in unconformity angles, are consistent with the minor structures and lithological features of the involved stratigraphic units. Forward modeling, including limb rotation, hinge migration, and the above-mentioned folding mechanisms, explains the main structural features of the syntectonic sediments in the Sant Llorenç de Morunys fault-propagation fold.

Folding (DSP implementation)

10.1306/13251336m943430

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Citations (2)

Anthropostratigraphy: New lithological units of the Quaternary controlled by human activity

Journal of Iberian Geology (2014)

Ferrán Colombo Piñol Oriol Riba Salvador Reguant Carmina Virgili L. Rivero

Many areas around the world such as the Mediterranean region have been inhabited without interruption for thousands of years. This is the case of the city of Barcelona (Spain), where remains of human settlements dating from pre-Roman times until the present have been found. A detailed geological mapping of the area occupied by the city of Barcelona raises a number of questions about the Holocene stratigraphy affected by human activity. In the old urban and surrounding areas most of the sedimentary deposits accumulated during settlement result from human interactions. Thus, new anthropostratigraphic units are proposed. The sedimentary deposits and the infill of rock excavations due to human presence may be divided into three categories: Natural lithoanthropogenic units (NAU) when their formation is not directly affected by anthropogenic activity but these contain artefacts of human origin. Induced lithoanthropogenic units (IAU) when natural processes together with human actions produce sedimentation or erosion due to natural phenomena; Constructed lithoanthropogenic units (CAU) when sedimentary accumulations and sharp contacts result from direct human activity.

Human settlement

Sedimentation

Geoarchaeology

Quaternary science

10.5209/rev_jige.2013.v39.n2.42500

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Citations (4)

Las inundaciones marinas del 1 de febrero de 1953 en los Paises Bajos

Estudios Geográficos (1954)

Oriol Riba

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