Dewing, K; Hadlari, T; Pearson, D G; Matthews, W. Geological Society of America Bulletin 2019 p. 1-20, https://doi.org/10.1130/B35017.1
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Gouwy, S A. Geoconvention 2020, abstract archive; 2020 p. 1
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Kabanov, P. Journal of the Geological Society vol. 177, 2020 p. 231, https://doi.org/10.1144/jgs2019-205
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Jiang, C; Obermajer, M; Kabanov, P; Mort, A. Geological Survey of Canada, Open File 8663, 2020, 7 pages, https://doi.org/10.4095/321479
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Kabanov, P; Vandenberg, R; Pelchat, P; Cameron, M; Dewing, K. arktos 2020 p. 1-14, https://doi.org/10.1007/s41063-020-00074-z
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Issler, D R; McDannell, K T; Lane, L S; O'Sullivan, P B; Neill, O K. Geological Survey of Canada, Open File 8821, 2021, 158 pages, https://doi.org/10.4095/328844
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Gouwy, S A; Pedder, A E H; Uyeno, T T; MacKenzie, W S. Geological Survey of Canada, Open File 8802, 2021, 50 pages, https://doi.org/10.4095/328354
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Re-release; Gouwy, S A. Sedimentary basins of northern Canada: contributions to a 1000 Ma geological journey and insight on resource potential; by Lavoie, D (ed.); Dewing, K (ed.); Geological Survey of Canada, Bulletin 609, 2022 p. 159-184, https://doi.org/10.4095/326098
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Re-release; Kabanov, P. Sedimentary basins of northern Canada: contributions to a 1000 Ma geological journey and insight on resource potential; by Lavoie, D (ed.); Dewing, K (ed.); Geological Survey of Canada, Bulletin 609, 2022 p. 129-158, https://doi.org/10.4095/326094
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Re-release; Larmagnat, S; Lavoie, D. Sedimentary basins of northern Canada: contributions to a 1000 Ma geological journey and insight on resource potential; by Lavoie, D (ed.); Dewing, K (ed.); Geological Survey of Canada, Bulletin 609, 2022 p. 185-213, https://doi.org/10.4095/326091
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Kabanov, P B; Abdi, W; Biggin, A J; Bilot, I; van der Boon, A; Gouwy, S; Grasby, S; Minions, N; Percival, J; Thallner, D; Twemlow, C; VandenBerg, R. Geological Survey of Canada, Open File 8940, 2023, 13 pages, https://doi.org/10.4095/331201
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Field evidence shows that emplacement of Devonian granites in northern England overlaps in space and time with the end of the supposed Acadian deformation in their country rocks. The age of this Acadian event in England and Wales is in need of review because of revised Rb-Sr and K-Ar decay constants and recently acquired radiometric ages on the granites.

Published K-Ar and Ar-Ar cleavage ages recalculated to the new decay constants range from 404 to 394 Ma (Emsian, Early Devonian). Emplacement of the Skiddaw and Weardale granites at 398.8 ± 0.4 and 399.3 ± 0.7 Ma respectively is indicated by U-Pb zircon ages, and is compatible with the field evidence. However, emplacement of the Shap Granite at a Re-Os molybdenite age of 405.2 ± 1.8 Ma and at the youngest U-Pb zircon age of 403 ± 8 Ma matches the field evidence less well. The apparent paradox in these ages is resolved if the K-Ar ages record only the end of millions of years of cleavage formation. An earlier cluster of K-Ar and Ar-Ar cleavage ages at 426–420 Ma (Ludlow to Přídolí, late Silurian) dates a pre-Acadian resetting event soon after Iapetus closure, an event of uncertain significance.

Ion microprobe U-Pb zircon ages for the Shap Granite have a mean of 415.6 ± 1.4 Ma but a range of 428–403 Ma, compatible with a long magmatic history. Thermal considerations suggest that this history was not at the upper crustal emplacement site but in a mid-crustal mush zone, now preserved at about 10 km depth as a component of the Lake District and North Pennine batholiths.

Oil residues occur as solid bitumen in mineralized zones within the Devonian Weardale Granite of the northern Pennines, northern England. Comparable residues are present in the overlying Mississippian rocks and were probably derived from a Carboniferous source, i.e. during later mineralization of the granite. The bitumen was already solidified during fluorite mineralization, which does not contain oil inclusions. The residues do not show the high thermal maturity of organic matter in the region altered by the earliest Permian Whin Sill. Like the sulphide-fluorite mineralization, oil emplacement post-dated intrusion of the sill. Pyrite associated with the oil residues is enriched in trace elements including lead, silver, gold, selenium and tellurium, which suggests that mineralizing fluids at least shared pathways with migrating hydrocarbons and possibly also suggests undiscovered valuable metal resources.

A number of partial articulated specimens of Cheiracanthus peachi nov. sp. have been collected from the Mey Flagstone Formation and Rousay Flagstone Formation within the Orcadian Basin of northern Scotland. The new, robust-bodied species is mainly distinguished by the scale ornament of radiating grooves rather than ridges. Compared to other Cheiracanthus species in the Orcadian Basin, C. peachi nov. sp. has quite a short range making it a useful zone fossil. As well as describing the general morphology of the specimens, we have also described and figured SEM images of scales and histological sections of all elements, enabling identification of other, isolated remains. Of particular biological interest is the identification of relatively robust, tooth-like gill rakers. Finally, the species has also been identified from isolated scales in Belarus, where it appears earlier and has a longer stratigraphical range, implying the species evolved in the marine deposits of the east and migrated west into the Orcadian Basin via the river systems.

Late Devonian–Early Carboniferous rocks at the southern end of the Kintyre Peninsula closely resemble those of the Kinnesswood and Clyde Sandstone formations in more easterly portions of the Firth of Clyde. For example, a previously unrecognized thick marlstone with pedogenic calcretes is present in the Kinnesswood Formation at the south tip of the peninsula and, on the west coast, south of Machrihanish, a striking cliffed exposure includes massive phreatic calcretes developed from cross-bedded sandstones and red mudstones closely resembling those of the Clyde Sandstone on Great Cumbrae. A similar phreatic calcrete unit is present in the lower part of the Ballagan Formation in south Bute. The presence of vadose and phreatic calcrete provides valuable information concerning palaeoclimatic conditions in southwestern Scotland during the Devonian–Carboniferous transition. Overlying thick volcanic rocks are correlative with the Clyde Plateau Volcanic Formation. The sediments accumulated in the South Kintyre Basin on the west side of the Highland Boundary Fault (HBF). Formation of this basin, and the North East Arran and Cumbraes basins in the northeastern part of the Firth of Clyde, is interpreted as a response to development of a ‘locked zone’ in the HBF during an episode of sinistral faulting.

A species of plant that grew about 400 million years ago (Early Devonian period) produced a spectrum of spore sizes, which is an essential innovation necessary for all advanced plant reproductive strategies, including seeds and flowers. The Devonian period is one of the most important time periods for the evolution of land plants. It witnessed [...]

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