Jurassic north sea. Jurassic, North Sea and Norwegian Sea Memo by T.

Jurassic north sea. Further analysis of the post-rift interval shows that the basin had by no means a quiet or uniform development in this phase, but saw the periodic out-building of some 9 major clastic wedges or megasequences, from the Norwegian and Scottish Abstract Open the PDF Link PDF for 8: Proximal Submarine Fan Reservoir Architecture and Development in the Upper Jurassic Brae Formation of the Brae Fields, South Viking Graben, U. The depositional area began to expand in the late Middle Jurassic as a result of a regional sea-level rise. The extensive seismic coverage and excellent sedimentological and biostratigraphic data from more than 30 wells makes the Horda platform a key Jan 1, 1992 · Jurassic plays in the North Sea are sandstones deposited in fluvial, shallow marine or submarine-fan environments located in the footwalls or hanging walls of rotated fault blocks. Hellem (Image is clickable) The syn-rift early Triassic basins of the Northern North Sea are compared with the same basins’ mid-Triassic to late-Jurassic post-rift evolution. The coals and mudstones that locally form a high proportion of the Aug 1, 1992 · Environmental significance of foraminiferal morphogroups in Jurassic North Sea deltas. During Jurassic time, the Gulf of Mexico and North Atlantic Ocean Basins continued to grow. , Palaeo- climatol. Sundance Sea The Sundance Sea was an epeiric sea that existed in North America during the mid-to-late Jurassic Period of the Mesozoic Era. The shallow seas inundating Jurassic continents allowed for extensive deposition of The Middle-Late Jurassic North Sea Rift Dome was established by recognition of the near base Middle Jurassic erosional unconformity in the central North Sea. 2). [1] It was an arm of what is now the Arctic Ocean, and extended through what is now western Canada into the central western United States. The perceived yet-to-find reserves of these often subtle plays, lying at or below seismic resolution, have attracted Jan 1, 2005 · The Middle-Late Jurassic North Sea Rift Dome was established by recognition of the near base Middle Jurassic erosional unconformity in the central North Sea. However, the development of an updated, recently published regional sequence stratigraphic understanding has led to the clarification of similarities and May 30, 2019 · Subsequent Late Jurassic North Sea rifting transected the MNSH to create the Western Platform between the Central Graben and Moray Firth rift arms. Sep 1, 2000 · Petrographic study of deeply buried Middle Jurassic Brent Group sandstones from the Kvitebjørn gas field in the Norwegian sector of the North Sea shows that quartz cement volumes range from less than 1% to almost 30% over short distances, and porosity ranges from 5 to 30%. 2 illustrates the presence of Late Jurassic age sandstone reservoirs across most of the North Sea and Norwegian Sea, interbedded with the prolific hydrocarbon source rock shales of the Draupne and Heather Formations, and their lateral equivalents. 1, Fig. This variation in amount of secondary porosity is Summary A 116 metre long core of Jurassic material from the Witch Ground Graben was examined. Barnard and Cooper, 1981; Ofstad, 1983; Cooper et al. Jan 1, 1995 · This paper is a first attempt to subdivide the Jurassic stratigraphy in the North Sea into a meaningful and useful hierar- chical division that will classify sequences by geologic duration (absolute and relative time), regional dis- tribution and the magnitude of facies changes. The differing structural styles were all interpreted as having evolved under a component of lateral displacement pairing extensional and contractional structures, produced by some combination of decoupled rift extension Dec 18, 2007 · Request PDF | Sedimentological and paleontological analysis of Jurassic North Sea deposits from deltaic environments | Core samples from Well 33/9-3, Norwegian North Sea, have been analysed A: Outline map of the Jurassic North Sea rift system showing the Danish sector of the Central Graben (blue) and the position of the map in Fig. , 1995), although this term essentially is restricted to the UK North Sea. In Europe, evaporites were deposited in the North Sea rift during Permian and Triassic time. Jan 1, 2020 · Reservoir quality assessment was conducted from petrophysical analysis and rock physics diagnostics on 15 wells penetrating Middle Jurassic sandstone reservoir formations in different regions of the eastern Central North Sea. Sea levels start low, becoming high by the Middle Jurassic. Abstract YIELDING Footwall uplift associated with Late Jurassic normal faulting in the northern North Sea. Depositional geometry outlined by key surfaces. Middle Jurassic hydrocarbon fields in the Beryl Embayment and Inner Moray Firth Basin are also significant and, although the play is mature, exploration is still active (Husmo et al. Mar 30, 2016 · The research joined isotopic and sedimentological data to suggest that an abrupt cooling event occurred in the midlatitudes early in the Middle Jurassic as a result of changing ocean currents associated with a feature known as the North Sea Dome. Nov 22, 2016 · This is the first ever scheme presenting the entire Paleozoic-Quaternary regional stratigraphy of the Northern North Sea, Central North Sea and West of Shetlands area, covering both the U. Synrift extensional activity occurred during the May 1, 2018 · The Middle Jurassic Brent Group in the northern North Sea rift basin (Fig. The Farallon Plate is formed and subducts below western America. K. , 1992). Barite typically occurs as an accessory cement in the sandstones of the Upper Jurassic Heno Formation; however in the Hejre field, barite appears more abundant in the crestal-most well than in other wells. Abstract The Devonian–Recent tectono-stratigraphic history of the Northern, Central and Southern North Sea is here reviewed at a regional scale and four novel cross-border pseudo-Wheeler diagrams are presented to summarize the stratigraphic evolution of The Brent Field is located within a N-S trending fault terrace, situated in the east Shetland Basin on the western margin of the North Viking Graben, UKNS. It has been recognized since the 1980s that the basins which comprise the Northern North Sea, including the North Viking Graben, were produced by two episodes of intra-continental rifting, during the Permo-Triassic and Late Jurassic, followed by thermal subsidence through to the present day. S. Of these, the Brent and Fangst Groups (Deegan & Scull 1977; Dalland et al. The lower Brent Group (accumulating Rannoch, Etive, and lower Ness formations 4. A clear correlation between quartz surface area and quartz cement volume indicates that this variation is due to Outline of presentation The Jurassic North Sea Rift, Danish Central Graben. The Brent field was the first discovery (1971) in this part of the North Sea and hydrocarbons were encountered in the Middle Jurassic Brent Group and the Lower Jurassic/Triassic Statfjiord Formation. The The vast majority of oil contained within Middle Jurassic sediments of the North Sea was sourced from the prolific Upper Jurassic Kimmeridge Clay Formation. However, records of Early Jurassic sea-surface temperatures that can be directly compared with general circulation model simulations of past climates are currently unavailable. Most of today's continental outlines are delineated by the end of the Jurassic, though they are not in their current locations. . g. The Jurassic was a time marked by a high level of plate tectonic The Mesozoic structures underneath the North Sea can be seen as a failed rift system. ABSTRACT An accurate chronostratigraphy of the timing and magnitude of global sea-level trends and their short-term variations is an indispensable tool in high-resolution cor-relations, exploration, and paleoenviron-mental and geodynamic models. The first mountain building period is the Nevadan orogeny. , Palaeogcogr. , Palaeoecol. Jurassic, North Sea and Norwegian Sea Memo by T. Summary In this paper, we present the importance of a regional dataset, acquired and processed with the latest seismic imaging technologies to better understand the depositional environments of one of the main hydrocarbon plays in the Northern North Sea – the Upper Jurassic sandstones. The Triassic play requires juxtaposition of the sandstone reservoirs with the Middle Jurassic coaly source rocks, or downward expulsion when the Middle Jurassic rests directly on the Triassic to allow The structural and stratigraphic evolution of the North Sea rift system is described, from the onset of pre-rift thermal uplift in the Aalenian to the failure of the rift system caused by the transfer of extension out onto the Atlantic margin during the Jan 1, 2006 · The Triassic strata of the northern North Sea were initially sub-divided into three formations: the Smith Bank, Skagerrak and Cormorant formations (Deegan & Scull 1977), defined within the Abstract The framework of salt tectonics in the Central North Sea was set early in the Triassic. During this tectonic epi-sode, major block faulting caused uplift and tilting, creating considerable local topography with erosion and sediment supply. On land, dinosaurs and flying pterosaurs dominated, and birds made their first appearance. Seismic interpretation on available 3D and 2D seismic reflection data was utilized to map thickness variations and to draw broad correlations to structural features such The Middle Jurassic coaly source rock can thus be linked to Triassic, Middle Jurassic and Upper Jurassic plays in the greater North Sea area. Porosity variations are related to the amount of compaction, which is more severe in matrix-rich May 4, 2023 · Abstract The most important North Sea Jurassic–lowermost Cretaceous lithostratigraphic units, as developed in the UK, Norway and Danish sectors, are summarized in this chapter (55 units from the UK, 25 from Norway and 10 from Denmark). The granite basement rocks of the Sierra Nevada and the Peninsular Coast Ranges (Southern California and Baja Such temporal relations demonstrate that North Sea volcanism is inconsistent with a classic ‘passive’ rift model. Mar 1, 2025 · The northern North Sea rift basin was mostly continental during the first rift phase, but was flooded in the Lower Jurassic, with major delta buildouts through the Middle Jurassic (Helland-Hansen et al. Jun 30, 2008 · The Jurassic Hugin Formation consists of shallow-marine sandstones that belong to a significant hydrocarbon reservoir in the Sleipner area in the Norwegian North Sea. It includes detailed sequence descriptions, historical syntheses and updated lithostratigraphy and biozonation schemes, all illustrated by numerous case studies, maps, well displays, seismic lines and biozonation charts. DK, Denmark; G, Germany; N, Norway Choose from multiple link options via Crossref Jan 8, 2021 · This study uses novel 3D seismic data together with an extensive selection of boreholes to investigate Late Jurassic syn-rift gravity flow systems on fault-terraced slopes from the northern North Sea Jan 1, 1995 · During the Jurassic period the Horda Platform, on the eastern margin of the North Viking Graben received a steady supply of clastic sediments which have left a fairly complete stratigraphic record of cyclical shore line transgression and regression. In recent years, the Upper Jurassic Intra-Heather Formation sands (Sognefjord, Fensfjord formations and equivalents) have been re-explored over the Horda Platform. The Aug 25, 2016 · Early Jurassic marine palaeotemperatures have been typically quantified by oxygen-isotope palaeothermometry of benthic and nektonic carbonate and phosphatic macrofossils. The objective of this study is to evaluate the reservoir quality of the Johansen Formation, as function of depositional history and architecture. 2) is a well-studied reservoir interval, and is generally considered as a regressive to transgressive delta system (Budding and Inglin, 1981; Graue et al. The development history of the North Sea area can be subdivided into five stages: 1) Caledonian geosynclinal stage (Cambrian-Silurian) 2) Variscan geosynclinal stage (Devonian-Carboniferous 3) Permo-Triassic intracratonic stage 4) Jurassic-Cretaceous taphrogenic rifting stage 5) Tertiary post-rifting intracratonic stage. Feb 27, 2025 · The Western Interior Seaway cut North America in half. Abstract 1989 BADLEY, PRICE & BACKSHALL Inversion, reactivated faults and related structures: seismic examples from the southern Summary The Northern North Sea is a complex, underexplored region with significant potential for hydrocarbon exploration. Sequence stratigraphy scheme for the uppermost Middle Jurassic–lowermost Cretaceous of the North Sea area Despite their maturity of exploration and development, Middle Jurassic sandstones of the North Sea and offshore Mid-Norway still repre-sent some of the most prolific hydrocarbon reservoirs in northwest Europe. et al (New Horned Dinosaurs from Utah Provide Evidence for Intracontinental Dinosaur Endemism) Eventually the shallow sea in North America (the “Western Interior Seaway”) would spread as far west as central Utah, but about 100 million years ago it was only as far west as roughly the Front Range Dec 11, 2015 · The North Sea Dome triggered perhaps the largest palaeoceanographically induced climate change in the Jurassic, at least on a super-regional scale. The evolution of the North Sea rift is related to the development of the Arctic North Atlantic rift zone. The sea receded when highlands to the west began to rise. 1B (red outline). Open Source photo from Sampson, Scott D. Because of continuous subduction and destruction of ocean crust in trenches, Middle Jurassic oceanic crust and sediments are generally the oldest sediments remaining in the deep sea. Rifting activity in the North Sea commenced during the earliest Triassic. that was eventually flooded by water from the Pacific Ocean, creating the Gulf of Mexico. Two broad groups of regressive–transgressive sandstone tongue are identified, with distinctive geometries, architectures and values of net-transgressive shoreline Dec 1, 2001 · The North Sea has experienced two main phases of Mesozoic rifting and associated thermal subsidence, during the Permo-Triassic and the Late Jurassic, separated by a period of thermal doming during the Middle Jurassic (Underhill and Partington, 1993, Underhill, 1998) (Fig. By the end of the Jurassic, normal marine conditions were established in the North Atlantic and Tethyan fauna migrated from Eurasia into the Gulf of Mexico. Crustal extension peaked during the Late Jurassic-earliest Cretaceous, abated subsequently and terminated altogether during the Paleocene. The Late Jurassic phases of rifting resulted in the development of the Viking Graben and East Shetland Basin (Fig. 1). Upper Jurassic sands are one of the major reservoirs in the Northern Viking Graben. The identification of regional trends in the North Sea Jurassic has been hampered by the application of diferent lithostratigraphic schemes between the Norwegian, UK and Danish ofshore sectors. Oct 3, 2012 · The supercontinent Pangaea begins breaking up during the Jurassic, with the birth of the Central Atlantic Ocean at the end of the Middle Jurassic. Aug 1, 2022 · The Devonian–Recent tectono-stratigraphic history of the Northern, Central and Southern North Sea is here reviewed at a regional scale and four novel cross-border pseudo-Wheeler diagrams are presented to summarize the stratigraphic evolution of the cycles of basin fill and uplift/erosion. Extending from 201. The map of North America with the Western Interior Seaway during the Campanian The Western Interior Seaway (also called the Cretaceous Seaway, the Niobraran Sea, the North American Inland Sea, or the Western Interior Sea) was a large inland sea that existed roughly over the present-day Great Plains of North America, splitting the continent into two landmasses, Laramidia to the west and Sep 24, 2014 · The framework of salt tectonics in the Central North Sea was set early in the Triassic. The Jun 1, 2020 · The Heno – Gertrud Plateau formed part of a widespread high-lying area in the Upper Jurassic North Sea rift basin bordered by the Tail End Graben along the Ringkøbing–Fyn High to the east, the Mandal High to the north and the Inge and Mid North Sea Highs to the west (Fig. e. Abstract The Middle-Late Jurassic North Sea Rift Dome was established by recognition of the near base Middle Jurassic erosional unconformity in the central North Sea. The formation encompasses coarsening-upward units of mouth bar and shoreface facies, interpreted to record delta outbuilding during regression; and fining-upward units with tidal channel, dune, and tidal flat facies interpreted 2. North Sea in another window Add to Citation Manager 9: Characterization of Thin-Bedded Turbidites in the North Brae Field, South Viking Graben, North Sea Sep 6, 2025 · Jurassic Period - Geology, Fossils, Climate: Jurassic igneous rocks have yielded uranium and gold in the Sierra Nevada range of North America, including placer deposits that were mined during the California Gold Rush of the mid-1800s. Porosity and permeability are strongly and systematically related to the initial texture and composition of the sandstones. Download scientific diagram | Jurassic depositional system map of the North Sea Basin from publication: River-gulf system—the major location of marine source rock formation | Petroleum was Dec 1, 2012 · The nature of porosity in organic-rich mudstones of the Upper Jurassic Kimmeridge Clay Formation, North Sea, offshore United Kingdom Sediments of Kimmeridgian to Late Ryazanian age form a group of key hydrocarbon play fairways in the syn-rift Jurassic of the North Sea. , 2002); (B) Late Jurassic stratigraphy developed on For the North Sea area, such correlations are based on the recorded microfossil distributions, tied to ammonite biozones in Jurassic outcrops and boreholes from onshore Britain and, to a lesser extent, onshore northern France and Greenland, these being the only two areas of Jurassic outcrop adjacent to the North Sea Basin. Download scientific diagram | A) Palaeogeographical map of the North Sea area during the Early–Middle Oxfordian (modified after Fraser et al. Giant volcanoes form mountain ranges and volcanic islands on the coast. Facies associations provide a textural proxy for gravel, sand and mud grain-size fractions, and Palynological Investigations in the Jurassic of the North Sea Region: Palynologisch Onderzoek in de Jura Van Het Noordzeegebied Jul 1, 2021 · The Upper Jurassic – lowermost Cretaceous shales in the North Sea, including the Central Graben region, have previously been referred to as the Kimmeridge Clay Formation, KCF (e. , 2003). Deposited unconformably over clean, non-carbonaceous, Triassic sediments, the three conformable Formations; Sgaith, Piper Mar 1, 2022 · The North Sea Super Basin is a trilete rift system located in the maritime waters of the United Kingdom, Norway, Denmark, Germany, and the Netherlands. In this scheme, six first-order megasequence boundaries have been defined, characterized by extensive Oct 1, 2025 · Most published sequence stratigraphical works on the North Sea Jurassic utilise genetic sequence stratigraphy because of the apparent clear expression of interpreted maximum flooding surfaces in wireline log data. The lithofacies consists of argillaceous shale, calcareous shale and dolomite stringers as confirmed by cuttings and core Abstract Three Jurassic unconformities of intra-Aallenian, intra-Callovian and intra-middle Oxfordian age are consistently identified within the literature for the North Sea region but despite their common recognition these unconformities remain poorly understood and they are essentially spatially and temporally unconstrained. Sep 18, 2009 · This paper outlines the use of the shoreline trajectory concept to understand the controls on net-transgressive reservoir distribution and architecture in the highly productive Middle and Late Jurassic plays in the North Sea. Here we use frequency decomposition colour blending (RGB) to identify depositional pathways of Late Jul 30, 1992 · The Mesozoic North Sea rift forms an integral part of the Arctic-North Atlantic rift system. The Mesozoic rift basin has proven rich in hydrocarbons for the Jurassic and younger stratigraphic succession. 6 days ago · A rare ancient sword dragon sea reptile fossil found in the UK reveals key details about Early marine life and ichthyosaur evolution. In addition, to avoid the bias of detrital zircon ages caused by variations in zircon fertility, we collected 1 709 whole rock zirconium content values (ppm) from granitic rocks Mar 15, 2017 · The Jude-1 well is located in the central part of the Danish Central Graben, North Sea, and was drilled into immature black shales of the Upper Jurassic–lowermost Farsund Formation, a world-class marine source rock. (Mesozoic time contains 3 parts - Triassic, Jurassic, Cretaceous periods. Some significant Jun 1, 2017 · Fig. , 2000; Zanella and Coward, 2003). A kinematic model for the orthogonal opening of the late Jurassic North Sea rift system, Denmark-Mid Norway. Wells Feb 1, 2022 · Reservoir non-destructive patchy barite cement occurs in volumes up to 16 vol% in deeply (>5150 m) buried shoreface sandstones in the Hejre field, Danish Central Graben, North Sea. Mar 1, 2000 · Close relationships are demonstrated between reservoir quality, lithofacies, provenance and burial history in the Jurassic Brent and Viking Groups in the Norwegian North Sea. 1 Ma. and The Middle Jurassic of the Central and Northern North Sea contains one of the most significant hydrocarbon reservoirs in the North Sea, the Brent Group. Main Jurassic reservoirs of the North Sea and Norwegian Sea (modified from NORLEX, 2012) shown alongside the chronostratigraphy and published eustatic sea level curve. ) At the beginning of the Mesozoic Era the supercontinent of Pangea broke up into pieces due to mega-forces beneath. Figures 13 and 14. , 95:111-134 The distribution of morphological groups of foraminifera has been analysed in Toarcian and Bajocian deposits of the northern North Sea and the Yorkshire coast. The Brent Group was cored in several of This uplift led to erosion of the Lower Jurassic and part of the Triassic successions in the Middle North Sea area, creating a regional unconformity termed the Mid-Cimmerian Unconformity (Ziegler, 1990; Underhill & Partington, 1993) (Fig. Instead, it seems more appropriate to equate Mid–Late Jurassic North Sea development with an ‘active’ rift model following mantle-driven thermal doming. , 1996). The differing structural styles were all interpreted as having evolved under a component of lateral displacement pairing extensional and contractional structures, produced by some combination of decoupled rift extension and Sep 6, 2025 · Jurassic Period, second of three periods of the Mesozoic Era. 3 million to 145 million years ago, the Jurassic was a time of global change in the continents, oceanographic patterns, and biological systems. We reconstruct spatial variations in grain size in the sediment routing system of the data-rich Middle Jurassic Brent Group of the northern North Sea, using published stratigraphic, thickness, palaeogeographic, provenance and age constraints combined with representative core and wireline-log data. Some of the diamonds in Siberia were emplaced during Jurassic times. Created after a phase of regional thermal doming in the Middle Jurassic, the rift basin consists of the Viking Graben, Central Graben, and Moray Firth Basin and their surrounding platform areas. The result upon the western portion of North America was that it rose up significantly above sea level, and Triassic deposits on the Colorado Plateau Jan 1, 1992 · Middle Jurassic sandstones of the Brent Group from the Huldra Field, North Sea show extensive framework grain dissolution. The Jurassic constitutes the second and middle period of the Mesozoic Era as well as the eighth period of the Phanerozoic Eon and is named after the Jura Apr 1, 2019 · The North Sea rift systems has a prolonged extensional history that began in Permo-Triassic and further continued during Jurassic and Early Cretaceous, followed subsequently by respective thermal cooling and subsidence stages (Ravnås et al. North America during the Jurassic. Sandstones of the Etive Formation, which represent a laterally extensive sandstone facies, show more leaching than equally permeable sandstones of the Ness Formation, which are likely to be less continuous laterally. Fifteen NA Deep Time maps (140, 125, 120, 105, 98, 93, 89, 87, 84, 82, 80, 77, 70, 67, and 65 Ma) overlap with the WIS maps; to show all North America for these time slices order the NA series. The most important Jurassic rifting phase in the North Sea area took place during the Late Jurassic and lasted into the Early Cretaceous. During the mid-Jurassic the central North Sea underwent a temporary doming stage. Furthermore, by comparison with available Late Jurassic climate proxy data and data on the palaeogeographical evolution of the North Sea region, a scenario for the causes of climate changes in the Jurassic are explored. Jul 28, 2023 · Comparisons of the North Sea Jurassic sequences with onshore outcrop sections, from the UK, demonstrate that many of the sequences can be recognized onshore. Jul 14, 2023 · This volume provides a landmark documentation of Jurassic sequence stratigraphy in the North Sea Basin, onshore UK and adjacent regions of the British Isles. 4 Ma (million years ago) to the beginning of the Cretaceous Period, approximately 143. Two broad groups of Philip Copestake, Merlin Energy Resources Ltd. The distribution and range of the The northern North Sea is a very active oil and gas exploration region, where several commercial discoveries have been made over recent years. The Jurassic (/ dʒʊˈræsɪk / juurr-ASS-ik[2]) is a geologic period and stratigraphic system that spanned from the end of the Triassic Period 201. Following Cretaceous post-rift deposition, the area experienced a significant easterly tilt in the Cenozoic that led to the demise of the MNSH as a prominent topographical feature. The core was sampled along its length, and major proportion of the organic content was found to be fusain (fossil charcoal) and was distributed throughout the length of the core. Jun 17, 2025 · Based on the detrital zircon U-Pb dating data, this paper discusses the provenance and constructs source-to-sink system of the Upper Jurassic in the North Yellow Sea Basin (NYSB), eastern North China Craton (ENCC). Rifting in the Ouachitas opened up a growing basin between the Yucatan and south-central U. This paper outlines the use of the shoreline trajectory concept to understand the controls on nettransgressive reservoir distribution and architecture in the highly productive Middle and Late Jurassic plays in the North Sea. After two decades of exploration, a large data base is available on the diagenesis of Middle Jurassic Brent and Upper Jurassic Piper-Claymore-Brae-Fulmar plays. Our Nov 1, 2016 · The Lower Jurassic, Johansen Formation sandstone, located in the Northern North Sea, has been proposed as a reservoir candidate for CO 2 storage by Norwegian authorities. , 1992; Færseth, 1996; Fjellanger et al. Facies associations of the late Middle Jurassic. Development of the North Sea rift system started during the Triassic and dominated the paleogeographic setting of the area during Ihe Jurassic and Cretaceous. Nevertheless, a comprehensive understanding of the Triassic stratigraphy and its potential for reservoir quality and CO2 storage is still lacking in the literature Jan 1, 2001 · An initial southward slope in the Danish Central Graben changed to a north- to eastward slope before the end of the Middle Jurassic, and the change possibly coincides with the formation of a conspicuous sequence boundary in the Bathonian. We defined and illustrated five major domains of differing salt tectonic style. The rift basins even saw some inversion during the late Cretaceous and The most important Jurassic rifting phase in the North Sea area took place during the Late Jurassic and lasted into the Early Cretaceous. This paper is a reappraisal of the Jurassic sea-level history in view of recent updates in time scales and a large body of new chro-nostratigraphic A subduction zone extends along the entire west coast of North and South America. Jul 15, 2020 · To understand the structural framework and basin evolution in segmented rift systems, this study addresses an integrated structural and stratigraphic analysis of the Middle–Upper Jurassic sequences in the northern North Sea. The Southern North Sea basin is the largest gas producing basin in the UK continental shelf, with production coming from the lower Permian sandstones which are sealed by the upper Zechstein salt. Nov 1, 2022 · In the northern North Sea, the Upper Jurassic Kimmeridge Clay (KC) and its equivalents in the Norwegian sector (i. Sep 6, 2025 · Jurassic Period - Rocks, Distribution, Occurrence: Jurassic rocks are widely distributed and include sedimentary, igneous, and metamorphic rocks. 1 The WIS maps use the same scale and projection as the new North America in Deep Time Series but are cropped to show the area of interest listed above. Oct 1, 2001 · In this paper, it is attempted to construct a detailed, semi-continuous and calibrated, Late Jurassic to earliest Cretaceous climatic curve for the North Sea region. It was Rhys (1974) who expanded the term to include shales of similar age in the May 5, 2023 · Chapter 5. Rifting, tophrogenic stage. The well was drilled with oil-based drilling mud (OBM). The distribution and range of the overlying hiatus illustrates the gross outline and duration of the exposed dome. 1988) are particularly important and, despite the vast number of wells, the published chronostratigraphic The overall regressive part of the Brent Delta (Middle Jurassic, Northern North Sea) has been analysed using this approach. Abstract: Selective reading of recent literature on north-west European tectonics could readily leave the impression that the North Sea rift, from the Danish Central Graben to the mid-Norwegian Haltenbanken area, developed during the late Jurassic - Early Cretaceous as a large 'pull-apart' basin, within which all Dec 1, 2012 · The nature of porosity in organic-rich mudstones of the Upper Jurassic Kimmeridge Clay Formation, North Sea, offshore United Kingdom Jun 22, 2022 · During the Jurassic, North and South America began to separate. , 1987; Helland-Hansen et al. , Mandal, Tau, and Draupne) are the most prolific source rocks. 3. [1] The evolution of the North Sea basin occurred through multiple stages throughout the geologic timeline. There is still no consensus, however, on whether the Oilfields in the East Shetland Basin comprise a variety of tilted fault blocks with two- or three-way dip closures. The Middle-Late Jurassic North Sea Rift Dome was established by recognition of the near base Middle Jurassic erosional unconformity in the central North Sea. The distribution, thicknesses and stacking patterns of facies associations have been analysed to unravel the trajectorial behaviour of the system. How geometry and rotational events connect. [2] After initial crustal extension and the formation of rift basins during the Triassic and Jurassic periods, [1]: [70] the extension concentrated on the other side of the British Isles, which would create the northern Atlantic Ocean. The distribution and range of the Jul 14, 2023 · This volume provides a landmark documentation of Jurassic sequence stratigraphy in the North Sea Basin, onshore UK and adjacent regions of the British Isles. fzyibh k6jai gliu p3 e42e5 klatec etiklyc 9inwz zhpwc 5vuj