Laura Burrel

British Geological Survey

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Antonio Teixell

Universitat Autònoma de Barcelona

Helen Burke

British Geological Survey

Rowan Vernon

Chinese Academy of Geological Sciences

Tom Randles

British Geological Survey

Richard Haslam

British Geological Survey

Oriol Oms

Universitat Autònoma de Barcelona

Enric Vicens

Universitat Autònoma de Barcelona

Mark A. Woods

University of California, San Diego

Jaume Dinarès‐Turell

Istituto Nazionale di Geofisica e Vulcanologia

Mark Woods

British Geological Survey

Cooperative Institutions

Universitat Autònoma de Barcelona

British Geological Survey

Institut Català de Paleontologia Miquel Crusafont

Universidad de Zaragoza

Royal Holloway University of London

University of Oxford

Museu d'Arqueologia de Catalunya

Universitat de Barcelona

Consejo Superior de Investigaciones Científicas

Geociencias Barcelona

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Constraining the K-Pg boundary in the Campo section (Southern Pyrenees, Spain)

Laura Burrel Oriol Oms Rita Estrada Enric Vicens Jaume Dinarès‐Turell

Section (typography)

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Citations (1)

Thickness variations in the Kimmeridge Clay Formation in southern and eastern Britain: implications for Late Jurassic basin evolution

Mark A. Woods Laura Burrel Andrew J. Newell

The Kimmeridge Clay Formation is a mudrock-dominated succession deposited during the Upper Jurassic –Kimmeridgian and Lower Tithonian stages– in a shallow shelf environment, below fair- weather wave base. With a maximum thickness of 712m onshore, and 1400m in the northern North Sea, the formation has several intervals of bituminous shales, rich in organic matter, that make it a major oil source rock in the North Sea.In the Late Jurassic, north-western Europe was part of the Laurasian Seaway, a shallow marine area underlain by a system of interconnected extensional basins. In Britain, sedimentation of the Kimmeridge Clay Formation took place in two main depo-centres; the onshore Wessex and Weald basins and adjacent Channel Basin in southern Britain, and the East Midlands Shelf and adjacent Cleveland Basin in north-eastern Britain, extending offshore into the North Sea. These depo-centres were bounded by normal fault systems. with significant syn-depositional activity associated with  Late Jurassic crustal extension allowing  development of thick sedimentary successions in the hangingwalls of these structures.The sedimentary patterns of the Kimmeridge Clay formation are rhythmic, with intervals of mudstones, organic-rich mudstones and carbonate-rich stone bands, that give characteristic inflection patterns to wireline logs. These patterns are very similar across the Wessex and Weald basins but differ slightly from those of the East Midlands Shelf and Cleveland Basin; perhaps a consequence of compartmentalisation of accommodation space by the Anglo-Brabant Massif.We present a new correlation of borehole geophysical logs (gamma & sonic) and associated thickness maps and structural maps for the Kimmeridge Clay Formation. They reveal lateral changes in thickness that reflect the influence of underlying basin structure on patterns of deposition and post-depositional erosion.

10.5194/egusphere-egu23-3143

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Compressional salt tectonics in the early stages of the South Pyrenean foreland basin

EGUGA (2017)

Laura Burrel Antonio Teixell

Salt tectonics

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An alternative model for the role of salt depositional configuration and preexisting salt structures in the evolution of the Southern Pyrenees, Spain

Journal of Structural Geology (2021)

Michael R. Hudec Tim P. Dooley Laura Burrel Antonio Teixell Naiara Fernández

Horst

Salt tectonics

Salt dome

Horst and graben

Basement

10.1016/j.jsg.2021.104325

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Citations (20)

Surface and subsurface mapping of the Flamborough Head Fault Zone to inform groundwater management in the Yorkshire Wolds, UK.

Rowan Vernon Laura Burrel Jon J. Ford Richard Haslam Tom Randles

The Flamborough Head Fault Zone (FHFZ) is a regionally-significant structural zone in northeast England which dissects the Upper Cretaceous Chalk Group, a 500 m thick limestone succession which is a principle aquifer and main source of water supply in the region. The geometry and physical characteristics of the Chalk succession, including the effects of faulting, influence groundwater flow across the region. Consequently, understanding the architecture of the FHFZ is vital to sustainably managing water resources in this area.The FHFZ marks the southern extent of the Cleveland Basin and the northern margin of the Market Weighton Block and has a complex history of Mesozoic-Cenozoic extension and compression. It is predominantly comprised of east-west trending faults which form a graben that is dissected by north-south trending faults, including the southern extension to the Peak Trough, the Hunmanby Fault. To the west, FHFZ links with the Howardian Fault System and offshore, in the east, it is truncated by the north-south trending Dowsing Fault. The FHFZ is well exposed and described in coastal cliff sections at Flamborough Head but the inland architecture of the faults has hitherto been poorly explored predominantly due to limited inland-exposure.To address this a multi-faceted approach to geological mapping has been undertaken in the region by the British Geological Survey, in collaboration with the Environment Agency and Yorkshire Water Limited. Remote sensing, targeted field mapping, palaeontological analysis, passive seismic and 2D onshore seismic interpretation have been integrated to understand the inland architecture of the FHFZ in unprecedented detail. Combining these techniques has enabled us to bridge the gap between the surface geology and deeper subsurface structure, increase our understanding of the geology of the region and produce an improved conceptual model at a range of depths which will be used to better manage water resources.

Cliff

Geologic map

Fault block

Growth fault

10.5194/egusphere-egu23-6983

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3D characterisation of the Yorkshire Wolds chalk aquifer, UK

Laura Burrel Rowan Vernon Jon J. Ford Richard Haslam Tom Randles

The Yorkshire Wolds Chalk aquifer, provides the main source of water supply in East Yorkshire and the city of Hull, which have a population over 900.000. Its structural configuration, including the effects of faulting, influence groundwater flow across the region. However, stratigraphic and structural characterisation is challenging due to limited bedrock being exposed at surface, with most of its extension covered by Quaternary glacial deposits and arable fields and pastures. While the coastal sections have been well characterised through the years, inland areas of the Yorkshire Wolds Chalk aquifer have not been systematically mapped since the late 19th century. The available maps do not reflect present-day stratigraphic divisions or current tectonic understanding, leading to an underestimation of the structural complexity of the aquifer.A multi-faceted approach to geological mapping is being undertaken in the region by the British Geological Survey, in collaboration with the Environment Agency and Yorkshire Water, integrating remote sensing, targeted field mapping, palaeontological analysis, 2D onshore seismic interpretation and borehole records. The objective of the project is to deliver an up-to-date geological map and structural model of the Chalk bedrock and Quaternary deposits which will impact on the groundwater resources management.The recent mapping campaigns have led to identifying and characterising numerous new faults in different structural trends, which were not present on previous maps. It has also led to a significant shifting of stratigraphic contacts and formation thicknesses, which have more lateral variability than previously thought. We present some of the most recent updates on the Yorkshire Wolds Chalk aquifer map, which highlight the importance of revising old cartography using modern tectonic and stratigraphic concepts and a multidisciplinary approach to field data collection and compilation. We are also interested in discussing with the hydrogeologist community how to better capture and represent structural complexity around fault zones, so it has an impact on hydrogeological modelling.

Bedrock

Geologic map

Geological survey

10.5194/egusphere-egu23-6663

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Basement-involved thrusting, salt migration and intramontane conglomerates: a case from the Southern Pyrenees

BSGF – Earth Sciences Bulletin (2021)

Laura Burrel Antonio Teixell David Gómez‐Gras Xavier Coll

The northern margin of the Organyà basin (Southern Pyrenees) has a complex structure in which syn-rift Lower Cretaceous carbonates flank a wide Keuper evaporite province, featuring the leading edges of the basement-involved thrust sheets of the Pyrenean antiformal stack. Recent studies show that Keuper diapirs and salt walls grew during the Cretaceous extensional episode, conditioning the development of differentiated depocenters and minibasins. The role of salt tectonics during the Pyrenean orogeny has not been addressed in previous structural studies, but present-day cross-sections indicate a Keuper evaporite-bearing vertical thickness of up to 3000 m in the Senterada-Gerri de la Sal area. We infer that salt migration was a determinant mechanism in triggering a gentle northward tilting of the Organyà basin during the Eocene-Oligocene, recorded in the La Pobla de Segur and Gurp syn-tectonic conglomerates in a large north-directed onlap, opposite to the main sedimentary influx direction. Contemporaneously, we interpret that salt migration, promoted by conglomerate differential loading, enabled the sinking and rotation of the unrooted Nogueres thrust units ( têtes plongeantes ). We use new and published structural data for the Lower Cretaceous margin of the Organyà basin, combined with structural and clast provenance data from the Cenozoic alluvial fan conglomerates of La Pobla and Gurp, to understand the Lutetian to late Oligocene evolution of the northern margin of the Central South-Pyrenean Unit. The tectono-sedimentary evolution of this area and the salt evacuation patterns are closely related to the exhumation history of the stacked Paleozoic thrust sheets of the Pyrenean hinterland to the north. In this study, we correlate the movements over a mobile substratum and the paleogeographic changes of conglomeratic basins at the toe of an exhuming orogenic interior.

Conglomerate

Basement

Salt tectonics

Onlap

Syncline

Anticline

Aptian

10.1051/bsgf/2021013

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Citations (11)

The upper Maastrichtian dinosaur fossil record from the southern Pyrenees and its contribution to the topic of the Cretaceous–Palaeogene mass extinction event

Cretaceous Research (2015)

José Ignacio Canudo Oriol Oms Bernat Vila Ãngel Galobart Víctor Fondevilla

Paleogene

Extinction (optical mineralogy)

10.1016/j.cretres.2015.06.013

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Citations (38)

Contractional salt tectonics and role of pre-existing diapiric structures in the Southern Pyrenean foreland fold–thrust belt (Montsec and Serres Marginals)

Journal of the Geological Society (2021)

Laura Burrel Antonio Teixell

Triassic Keuper evaporites have long been recognized as the main detachment level for thrusting in the Pyrenean fold–thrust belts. The deformed Late Cretaceous–Eocene foreland basin of the Southern Pyrenees has structures and stratal geometries that can be interpreted as related to salt tectonics (e.g. unconformities, rapid thickness variations, long-lived growth fans and overturned flaps), although they have been overprinted by shortening and thrusting. Based on field observations and published maps, we build new structural cross-sections reinterpreting two classic transects of the Southern Pyrenees (Noguera Ribagorçana and Noguera Pallaresa river transects). The sequential restoration of the sections explores the variations in structural style, addressing the role of halokinesis in the tectonic and sedimentary development. In the Serres Marginals area, we propose that salt pillows and diapirs started developing locally during the Mesozoic pre-orogenic episode, evolving into a system of salt ridges and intervening synclines filled with early synorogenic sediments. Rapid amplification of folds recorded by widespread latest Cretaceous–Paleocene growth strata is taken as marking the onset of contractional folding in the area. During Pyrenean compression, folding mechanisms transitioned from dominantly halokinetic to a combination of buckling and differential sedimentary loading. Squeezing of salt diapirs and thrust welding occurred as salt ridges were unroofed. We provide new field observations that lead to a reinterpretation of the regional structural development and contribute to the debate about the role of salt tectonics in the Pyrenees. Supplementary material: Table S1, giving the thickness of the main stratigraphic units, is available at https://doi.org/10.6084/m9.figshare.c.5287737

Salt tectonics

Paleogene

Syncline

10.1144/jgs2020-085

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Citations (29)

AN INTEGRATED METHODOLOGY FOR THE 3D CHARACTERISATION OF BEDROCK GEOLOGY IN AREAS OF LIMITED OUTCROP – CASE STUDY: THE YORKSHIRE WOLDS CHALK AQUIFER, UK

Abstracts with programs - Geological Society of America (2023)

Laura Burrel Rowan Vernon Jonathan R. Ford Richard Haslam Tom Randles

Outcrop

Bedrock

10.1130/abs/2023se-385427

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