Lithofacies and depositional processes on a high, steep-margined Carboniferous (Bashkirian–Moscovian) carbonate platform slope, Sierra del Cuera, NW Spain

Bahamonde, Juan R.; Kenter, J.A.M.; Porta, Giovanna Della; Keim, Lorenz; Immenhauser, Adrian; Reijmer, John J.G.

doi:10.1016/j.sedgeo.2003.11.019

Cited by 39 publications

(37 citation statements)

References 12 publications

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“…Present-day north coordinates are indicated. ModiWed after MerinoTomé et al (2009) unit (Bahamonde et al 1997(Bahamonde et al , 2004(Bahamonde et al , 2007Della Porta 2003;Kenter et al 2005; among others; Fig. 1c).…”

Section: Geological Settingmentioning

confidence: 78%

“…Its systematic aYliation is still controversial and it has been assigned to several groups of organisms, such as calcareous algae, foraminifers, calcareous sponges, and pseudo-algae (for a review, see Della Porta et al 2002;Choh and Kirkland 2006). Donezella accumulations are widely distributed across the world and have been addressed speciWcally in many studies carried out in the Cantabrian Zone, NW Spain (Racz 1964;Bowman 1979;Riding 1979;Eichmüller 1985; Barba and Colmenero 1994;Hensen et al 1995;Bahamonde et al 1997Bahamonde et al , 2004Bahamonde et al , 2007Samankassou 2001;Della Porta et al 2002;Della Porta 2003;von Allmen 2006;Coronado and Rodríguez 2009). While the sedimentological and paleoenvironmental role of these organisms is relatively well known, many questions concerning the controls on bioherm development remain to be elucidated.…”

Section: Introductionmentioning

confidence: 99%

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Transgressive–regressive sequence stratigraphy of Pennsylvanian Donezella bioherms in a foreland basin (Lena Group, Cantabrian Zone, NW Spain)

Corrochano

Barba

Colmenero

2011

Facies

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A well-preserved Pennsylvanian (early Moscovian) succession including Donezella mounds, which accumulated in a highly subsiding foreland basin (Cantabrian Zone, NW of Spain), is described and discussed. This succession has been interpreted as one 3rd-order sequence reaching a thickness up to 815 m and recording »2.3-My duration. It consists of four 4th-order transgressive-regressive (T-R) sequences (105-350 m thick and »0.6-My duration), each subdivided into several 5th-order (»70-ky duration) meter-scale cycles (23-m average thickness). Nearly all the Donezella mounds are present in the second and third 4th-order sequences deWned (Levinco Formation). They are up to »90 m in thickness and several hundreds of meters wide, showing lenticular to domal morphologies with steep slopes up to 35-40°. Bioherms are composed of micritic boundstones with heterogeneous microfabrics and a diverse biotic community, including the microproblematic Donezella, calcitornellid foraminifers, bryozoans, agglutinated worm tubes, crinoids, and calcareous algae (red Komia/Ungdarella, beresellids, dasycladaceans and phylloids). According to the biotic assemblage and sedimentological features, these Donezella-rich bioherms thrived in a relatively shallow and low-energy environment (below fair-weather wave-base), and resulted from the baZing and binding ability of Donezella and associated biota, and the in situ-precipitation of microbial micrite. The upward evolution of the succession mainly resulted from the interplay between high tectonic subsidence rates and high-frequency moderate-amplitude glacioeustatic sealevel changes. The mounds growth mainly occurred during the transgressive phase of the 3rd-order sequence (Vereian), whereas during the regressive phase (Kashirian), deltaic siliciclastics prograding westward gradually buried and prevented the buildup development.

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Section: Geological Settingmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Transgressive–regressive sequence stratigraphy of Pennsylvanian Donezella bioherms in a foreland basin (Lena Group, Cantabrian Zone, NW Spain)

Corrochano

Barba

Colmenero

2011

Facies

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“…Water depths down to 300 m are inferred for the microbially dominated, cementrich boundstones reported by Bahamonde et al (2004) from a steep-margin (30-40°) carbonate platform slope of the Carboniferous of NW Spain.…”

Section: Depositional Environmentmentioning

confidence: 97%

The occurrence and role of microencruster frameworks in Late Jurassic to Early Cretaceous platform margin deposits of the Northern Calcareous Alps (Austria)

Schlagintweit

Gawlick

2007

Facies

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“…Nevertheless, during thrusting, platform strata were cut by thrusts oriented almost parallel to the direction of the progradation of the western margin. As a result, kilometer-scale exposures now show the progradational geometries of the platform margin (see Bahamonde et al, 1997Bahamonde et al, , 2000Bahamonde et al, , 2004Bahamonde et al, , 2007Della Porta, 2003Kenter et al, 2003). This type of outcrop would not have occurred if the orogenic wedge had continued advancing in an east-west direction during the thrusting of the platform, implying a nearly 90° change in the thrust transport direction.…”

Section: Closure Of the Iberian-armorican Arcmentioning

confidence: 99%

Emplacement of the Cuera and Picos de Europa imbricate system at the core of the Iberian-Armorican arc (Cantabrian zone, north Spain): New precisions concerning the timing of arc closure

Merino-Tomé

Bahamonde

Colmenero

et al. 2009

Geological Society of America Bulletin

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The fi nal stages of the Variscan orogeny (mostly Carboniferous) in the Western European Variscan belt involved the development of the Iberian-Armorican arc, which is cored by the Cantabrian zone (NW Iberia). TheCantabrian zone is the foreland of the Western European Variscan belt, and it is interpreted to record the waning stages of the closure of the Rheic Ocean. The distalmost tectonic units within the Cantabrian zone (the Cuera Unit and the Picos de Europa Province) were the last tectonic units emplaced at the core of the Western European Variscan belt orocline. Together, they form an imbricate system and associated wedge-top basins that are key to understanding the development of the orocline. The emplacement of the Cuera Unit and the Picos de Europa Province occurred in the latest Pennsylvanian, between Moscovian and Gzhelian times. New detailed mapping together with stratigraphic, sedimentologic, and biostratigraphic data analysis of syntectonic successions and structural information constrain the timing and evolution of this imbricate system. Our analysis indicates that the thrust sheets were emplaced roughly perpendicular to previous tectonic units of the Cantabrian Variscan foreland fold-and-thrust belt, most probably during the oroclinal bending of the SW European Variscan belt that formed the Iberian-Armorican arc. The N-S-directed imbricate system was characterized by a shallow dip of the topographic surface (α < 1°), allowing for the development of wedge-top basins. The large amount of shortening (>150 ± 15 km) and complex structure of the orogenic wedge are thought to result from the progressive increase in the dip of the basal décollement during bending of the underlying Gondwana lithosphere and may refl ect the closure of the Iberian-Armorican arc.

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Lithofacies and depositional processes on a high, steep-margined Carboniferous (Bashkirian–Moscovian) carbonate platform slope, Sierra del Cuera, NW Spain

Cited by 39 publications

References 12 publications

Transgressive–regressive sequence stratigraphy of Pennsylvanian Donezella bioherms in a foreland basin (Lena Group, Cantabrian Zone, NW Spain)

Transgressive–regressive sequence stratigraphy of Pennsylvanian Donezella bioherms in a foreland basin (Lena Group, Cantabrian Zone, NW Spain)

The occurrence and role of microencruster frameworks in Late Jurassic to Early Cretaceous platform margin deposits of the Northern Calcareous Alps (Austria)

Emplacement of the Cuera and Picos de Europa imbricate system at the core of the Iberian-Armorican arc (Cantabrian zone, north Spain): New precisions concerning the timing of arc closure

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