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Showing 1 to 13 of 13 for “"Lower Carboniferous"”.
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Petrology, geochemistry, diagenesis and depositional environment of the Upper Devonian - Lower Carboniferous Exshaw Formation, northwestern Alberta.
The Upper Devonian (Famennian)-Lower Carboniferous (Tournaisian) Exshaw Formation is a thin, laterally extensive organic-rich petroleum source rock. It is one of Canada's most important petroleum source rocks and is a major contributor to the Lower Cretaceous Mannville heavy oil accumulations in …
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The Lower Carboniferous (Chadian-Brigantian) geology of shallow marine carbonate rocks in the central and southeast Irish Midlands and the Wexford Outlier
"This is the first comprehensive study, consisting of integrated petrographical, paleontological and geochemical analyses on the post-Waulsortian strata in the central and southeast Irish Midlands. This study reveals that the style of sedimentation and early diagenesis substantially influenced the …
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Revision of the Upper Devonian in the Central-Southern Appalachian Basin: Biostratigraphy and Lithostratigraphy
… ranges in age from the Middle Devonian to the Lower Carboniferous. The stratigraphic units include the Middle Devonian Millboro Shale, the Upper Devonian Brallier, Scherr, Foreknobs (formally the "Chemung"), Hampshire, and the Lower Carboniferous Price Formation. The Brallier contains two …
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The Carboniferous Courceyan-Chadian) Sedimentary Facies Mosaic of the Keel -Ardagh Area of County Longford, Eire
… environments of the Silurian, Devonian and Lower Carboniferous lithologies in the Keel area are deduced and described. This was accomplished by the analysis of over 10.000M. of diamond drilled core from the area. <br/><br/>The oldest rocks are Silurian shales with turbidites. Deposition was …
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The integration of petrologic and isotopic data from the Boulder Conglomerate to determine the age of the Navan orebody, Ireland
The Boulder Conglomerate is the Lower Carboniferous sedimentary allochthon deposited in the second order half graben created by major listric normal faults in the Navan area. The base of the Boulder Conglomerate comprises erosive-based, highly immature rock avalanches which are interbedded with …
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Seismic studies on the Derbyshire dome
… have been a stable uplifted area since at least Lower Carboniferous times. This project is principally concerned with four 30km seismic refraction lines which crossed the limestone outcrop of Derbyshire and N. Staffordshire in order to investigate the Dome's upper crustal structure, using quarry …
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Paleomagnetic and mineral magnetic studies of zinc-lead ore deposits in the Metaline (Washington state, USA) and Midlands (Ireland) ore fields
… (conodont alteration indices (CAI) of <3) Lower Carboniferous rocks at 18 sites (231 specimens) from Northern Ireland indicate posttilting ChRMs in magnetite and pyrrhotite that record a secondary CRM that was acquired ~3 to 4 Ma after limestone deposition. Also, paleomagnetic analyses of …
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Faulting, sedimentation and fluid flow at the basin margin : the north Solway fault
… Solway-Northumberland trough. The fault offsets Lower Palaeozoic lithologies (basement) against Lower Carboniferous sediments. The North Solway fault is a rare example of an onshore fault with a basement footwall and sedimentary hanging wall. The fault is exposed in extensive along-strike and …
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Die Turbiditsandstein-Komplexe der devono-karbonischen Markstein Gruppe im Oberelsass (NE-Frankreich) und ihre Beziehungen zu den moldanubischen Gesteinseinheiten von Schwarzwald und Vogesen
Zusammenfassung <br> <br>Mit der geologischen Untersuchung von Sedimentgesteinen in den Südvogesen (NE-Frankreich) und im Südschwarzwald (SW-Deutschland) wird ein Beitrag zur Paläogeographie und zur Geodynamik der moldanubischen Gesteinseinheiten des mitteleuropäischen Variszikums geleistet. Die …
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Tectonics and sedimentation in the Devonian and carboniferous rocks of SW Devon, England.
… with a different style of deformation. In the Lower to Upper Devonian rocks of the southern zone, slip vectors, vergence and facing of D 1 folds indicate that the transport direction is to the north west. The northern zone, comprising Upper Devonian and lower Carboniferous strata, extends into …
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Integrated numerical modelling of a polyhistory basin, Southern Cantabrian Basin (Palaeozoic, NW-Spain)
… by the approach of the Variscan Orogen in the Lower Carboniferous. The rift stage is characterised by decreasing thermo-tectonic subsidence rates until the Middle Cambrian. The time that follows (Late Cambrian until Late Ordovician) is marked by periods of tectonic quiescence and activity, …
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Causes and Mechanisms of Remagnetisation in Palaeozoic Sedimentary Rocks - a Multidisciplinary Approach
… in the areas studied. NE Rhenish Massif: A Late Carboniferous remagnetisation (component B) is identified in Late Palaeozoic carbonate and clastic rocks from the NE Rhenish Massif. Three individual incremental regional fold tests across the area show a unique and distinctive variation in timing …
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Rb-Sr Alter und Sr-Pb Isotopencharakteristik von Gangmineralisationen in paläozoischen Gesteinen am Nordrand des linksrheinischen Schiefergebirges (Raum Stolberg-Aachen-Kelmis) und Vergleich mit den rezenten Thermalwässern von Aachen-Burtscheid
… From top to the base the bore hole exposed Upper Carboniferous, Upper Devonian and Lower Devonian carbonate and siliciclastic sediments. Three core cuts display intensive hydrothermal veining with variable orientations. These veins are mm to cm wide and represent extension structures with …