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Torridon Group

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Journal Article
Published: 01 April 2015
Scottish Journal of Geology (2015) 51 (1): 63-68.
...George E. Williams AbstractWeathering profiles 2–3 m thick mantle a palaeoplain formed on the Lewisian Complex and are overlain unconformably by fluvial conglomerates of the c. 980 Ma Applecross Formation (Torridon Group) in NW Scotland. Geological and palaeomagnetic data indicate...
FIGURES
Journal Article
Published: 01 May 2012
Journal of the Geological Society (2012) 169 (3): 297-310.
...Magdalena A. Ellis; S. E. Laubach; P. Eichhubl; J. E. Olson; P. Hargrove AbstractThe Late Proterozoic Torridon Group Applecross Formation in the foreland of the Moine Thrust Belt, NW Scotland, contains deformation bands, three fracture sets (from oldest to youngest A, B, and L) defined...
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Series: Geological Society, London, Memoirs
Published: 01 January 2002
DOI: 10.1144/GSL.MEM.2002.024.01.04
EISBN: 9781862393998
... and shales in the Torridon Group A Diabaig B Applecross C Applecross D Applecross E Aultbea F Cailleach Hd sst. shale sst. shale sst. shale sst. shale sst. shale sst. shale n = 2 n = 2 n = 2 n = 1 n = 2 n = 1 n = 2 n = 1 n = 2 n � 2 n = 1 n...
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Journal Article
Published: 01 December 1997
Journal of the Geological Society (1997) 154 (6): 987-997.
...GEORGE E. WILLIAMS; PHILLIP W. SCHMIDT AbstractA palaeoplain that cuts across Lewisian Gneiss in the Cape Wrath area, northwest Scotland, is weathered to depths of 1–6 m beneath fluvial red conglomerates and sandstones of the Applecross Formation of the early Neoproterozoic Torridon Group...
Journal Article
Published: 01 December 1990
Journal of the Geological Society (1990) 147 (6): 999-1007.
...G. J. Potts AbstractTwo geologically significant palaeomagnetic components have been isolated in samples of Torridon Group sandstones from the Kishorn nappe of NW Scotland. The samples were collected from the Eishort anticline, a large recumbent fold of Caledonian age. The softer component (which...
Journal Article
Published: 01 December 1999
Journal of the Geological Society (1999) 156 (6): 1097-1111.
... in an environment with little weathering, but chemical weathering is inhibited in both frigid and arid settings and sedimentological evidence favours the latter. The Stoer Group mudstones are enriched in Mg, Ca and Na relative to the Torridon Group samples, which are much closer in composition to an average shale...
Journal Article
Published: 01 January 2008
Journal of the Geological Society (2008) 165 (1): 379-394.
... fluvial deposits. The Altnaharra Formation and the unmetamorphosed, Neoproterozoic Applecross–Aultbea formations (Torridon Group) are similar in terms of lithology, stratigraphical thickness, sedimentology, geochemistry, detrital zircon ages and stratigraphical position on Archaean basement. Depositional...
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Journal Article
Published: 18 October 2016
Scottish Journal of Geology (2016) 52 (2): 103-109.
...Tomas Cain; Graham Leslie; Stuart Clarke; Michael Kelly; Maarten Krabbendam AbstractSouth of the Loch Maree Fault in the Northwest Highlands of Scotland, an unexplained step-wise thickening of Torridon Group strata, from c. 200–1000 m, occurs towards the Loch Maree Fault, within the trailing edges...
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Journal Article
Published: 01 January 2001
Journal of the Geological Society (2001) 158 (1): 15-27.
...ROBERT H. RAINBIRD; MICHAEL A. HAMILTON; GRANT M. YOUNG AbstractBetween 30 and 50 single detrital zircons from each of four specimens of the Stoer Group and two specimens from the unconformably overlying Torridon Group were analysed on the GSC SHRIMP II ion probe. 207Pb/206Pb ages of zircons from...
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Series: AAPG Memoir
Published: 01 January 1969
DOI: 10.1306/M12367C43
EISBN: 9781629812274
...-thick wedge arkoses of the predominantly red Torridon Group include all the sandstone of the original type area about Loch Torridon. Locally, they unconformably overlie similar red sandstone (Stoer Group) which is more than 2,000 m thick. In the Caledonian Kishorn nappe of Skye, red Torridon Group...
Image
( a ) The Lewisian–<b>Torridon</b> <b>Group</b> unconformity (arrow) at Poll a’Mhurain, s...
Published: 01 April 2015
Fig. 2. ( a ) The Lewisian–Torridon Group unconformity (arrow) at Poll a’Mhurain, showing a vein of white saddle dolomite in weathered amphibolite 0.4 m below the unconformity (site SD02); the box shows the area for (b). Viewer looking east; the rocks are tilted to the NW. ( b ) Vein of white
Image
Map showing outcrop of Applecross Formation (<b>Torridon</b> <b>Group</b>) in relation to...
Published: 01 May 2012
Fig. 1. Map showing outcrop of Applecross Formation (Torridon Group) in relation to surrounding units, western Scotland. (After Peach et al . 1907 ; Stewart 1969 ; Stewart & Goodenough 2009 .) Box: location of study, east of An Teallach [NH110 850], Wester Ross. MTB, Moine Thrust Belt
Image
Sections showing the Lewisian palaeotopography buried by the <b>Torridon</b> <b>Group</b>...
Published: 01 July 2001
Figure 2. Sections showing the Lewisian palaeotopography buried by the Torridon Group; no vertical exaggeration of scale. (a) Cliff section at Creag Riabhach in the Cape Wrath area [NC 278643–285632], showing the sedimentary architecture of the lowest 150 m of the Cape Wrath Member (facies
Image
Sections showing the Lewisian palaeotopography buried by the <b>Torridon</b> <b>Group</b>...
Published: 01 March 2001
Figure 2. Sections showing the Lewisian palaeotopography buried by the Torridon Group; no vertical exaggeration of scale. (a) Cliff section at Creag Riabhach in the Cape Wrath area [NC 278643–285632], showing the sedimentary architecture of the lowest 150 m of the Cape Wrath Member (facies
Series: Geological Society
Published: 01 January 2017
EISBN: 9781786202932
... Abstract The degree of structural order in the organic carbon preserved in grey–black shales of the Neoproterozoic Torridon Group was characterized using Raman spectroscopy. All the samples contained kerogen rather than graphite, which is consistent with a low level of metamorphism. Samples...
Journal Article
Published: 01 November 2004
Scottish Journal of Geology (2004) 40 (2): 123-130.
.... This suggests that fracturing and clastic filling took place when a considerable amount of Torridonian sediment was already deposited and lithified and a source from the upper Torridon Group (Aultbea and/or Cailleach Head Formations) is inferred. We suggest that fracturing within the Lewisian basement...
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Journal Article
Published: 01 May 2007
Journal of the Geological Society (2007) 164 (3): 541-551.
...T.C. Kinnaird; A.R. Prave; C.L. Kirkland; M. Horstwood; R. Parrish; R.A. Batchelor AbstractThe Torridonian succession of NW Scotland comprises three groups, deposited during late Mesoproterozoic to early Neoproterozoic time, the Stoer, Sleat and Torridon. Previous workers have inferred that each...
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Journal Article
Published: 01 January 2004
Geological Magazine (2004) 141 (1): 15-39.
... but was probably fixed by early dewatering and lithification because slumped blocks of Stoer in basal Torridon Group sediments preserve a primary remanence. Tilt adjustment, although inconclusive, also implies that magnetic remanence is older than pre-Torridian Group tectonic deformation. The lower part...
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Journal Article
Published: 01 December 1996
Journal of the Geological Society (1996) 153 (6): 955-964.
... regressions from siltstones of the Diabaig and Applecross Formations (both Torridon Group) produce ages of 994 ± 48 (2σ) Ma (MSWD = 17) and 977 ± 39 (2σ) Ma (MSWD = 10) respectively. These dates, which agree well with palaeomagnetic estimates, are interpreted as the time of early diagenesis which is probably...
Journal Article
Published: 01 November 2005
Scottish Journal of Geology (2005) 41 (2): 149-157.
...) are similar to the reference Torridon Group poles (c. 980 Ma). The magnetite magnetization is interpreted to be of detrital origin whereas the haematite component is considered to be a detrital and/or early chemical remanence. The magnetizations in both dyke sets are inferred to have been acquired during...
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