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| development in the Channel Islands and northern Brittany DAVID WENT a & MICHAEL ANDREWS 2 1 Department...(Jersey), Alderney Sandstone Formation and the Erquy-Frrhel Group (northern Brittany), have established...minor constituents of the Alderney Sandstone Formation and Erquy-Fr6hel Group, fluviatile sediments deposited...and similar tributary systems in Alderney and Brittany, indicate drainage orientated either transverse...Islands of Jersey and Alderney, and in northern Brittany. These red-bed deposits have been considered as |
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| Tectonic evolution of the Cadomian belt in north Brittany R. A . S T R A C H A N 1 & R. A . R O A C H 2...A discrete geotectonic unit, here termed the St Brieuc Terrane, has been identified within the late Precambrian...resulted in the internal imbrication of the St Brieuc Terrane into five tectonic blocks, mainly bounded...dip-slip senses of movement. Amalgamation of the St Brieuc Terrane with the St Malo Terrane to the SE occurred...events. The late Precambrian Cadomian belt of Brittany and Lower Normandy (Fig. t) comprises extensive |
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| Palaeozoic red beds around the Baie de Saint Brieuc, Brittany, in the light of illite crystallinity studies...were arranged for 8th January; one to New Red Sandstone sections led by Dr. R.C. Scrivener and Dr. J.M...parties did however venture out, though the New Red Sandstone excursion was unfortunately abandoned following...fine laminae and bands of silt and fine grained sandstone characterised by parallel lamination, minor crosslamination...are alternating flags of buff to greenish grey sandstone and dark grey mudstone (slate). The sandstones |
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| 0 B P , The North Armorican Massif (NAM) of NW France is the type locality of the late Precambrian Cadomian...may therefore lie beneath the Cadomian belt of Brittany and Normandy. Sm/Nd studies currently in progress...diorites exposed on the east side of the Baie de St Brieuc (Fig. 1) were formerly thought to have a minimum...quartz diorite; Yf, Yffiniac; BdSB, Baie de St Brieuc; BI, Belle-Isle-en-Terre. demonstrated that much...Basal Brioverian conglomerates in the Baie de St Brieuc contain granitoid boulders which Shufflebotham |
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| volcanic rocks in the northern Armorican Massif (France). Implications for geodynamic evolution during...of the Brioverian volcanic rocks in the NW of Brittany. They are compared with recent and modern volcanic...associated with subduction. 2 The volcanic rocks of St Brieuc Bay are similar to tholeiitic within-arc or back-arc...volcanic complex both in Lannion Bay and in St Brieuc Bay (two of the three sequences studied here) and...) , - ~ /' q~_l,.;,/ / pentevrian -~'~'~) ST BRIEUC BAY ~ - ~ J .'?'~ /A~':'.~-~ lack cherts ~ |
 | Nance, R.D., Murphy, J.B., Strachan, R.A., D'Lemos, R.S., Taylor, G.K. (1991) Late Proterozoic tectonostratigraphic evolution of the Avalonian and Cadomian terranes. Precambrian Research, 53 (1) 41-78 doi:10.1016/0301-9268(91)90005-u | Journal (article/letter/editorial) |
| terrane in the Cadomian orogenic belt of northwestern France (see papers in D'Lemos et al., 1990a). Major orogenesis...and in the Armorican massif of northwestern France in Brittany, Normandy and Maine. Recent reviews of each...and in the North Armorican composite terrane of Brittany (Fresnaye and Cancale shear zones; Strachan et...7000 m) succession of diamictite, conglomerate, sandstone, and argillite that together define the fault-bounded...volcano-sedimentary successions Cambro-Ordovician Saint John Group ] Undifferentiated Paleozoic rocks |
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| Geology in France and Related Areas (1994) J. D. Keppie (Ed.) Pre-Mesozoic Geology in France and Related...Cataloging-in-Publication Data. Pre-Mesozoic geology in France and related areas / J. D. Keppie (ed.). p.cm.Developed...2. Geology, Stratigraphic-Paleozoic. 3. Geology-France.!. Keppie, J. Duncan. II. IGCP Project 233-Terranes...comprehensive account of the PreMesozoic Geology of France (Armorican and Central Massifs) and related areas...the international copference held in Montpellier, France, in August, 1988, where a vast amount of new information |
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| JOJ SKETCH OF THE GEOLOGY OF CENTRAL BRITTANY. WITH SPECIAL REFERENCE TO THE WHITSUNTIDE EXCURSION...Cetes-du-Nord : 1. Mass of Quintin; 2. Mass of St. Brieuc. 1V. GENERAL STRUCTURE OF THE DISTRICT 103 104...cross the Channel once more and to pay a visit to Brittany, the present notice is offered to the members...idea of its geological structure. The subsoil of Brittany consists of pre-Cambrian and Palreozoic strata...1899,] 8 o '" o z FIG . I.-SKETCH ·!\1AP OF BRITTANY. SHOWING THE CHIEF ANTICLINALS OF THE COU NTRY |
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| from the Ediacaran-Lower Cambrian Series Rouge, France William J. McMahon, Neil S. Davies, David J. Went...from the Ediacaran-Lower Cambrian Series Rouge, France, Precambrian Research (2017), doi: http://dx.doi...from the Ediacaran-Lower Cambrian Series Rouge, France William J. McMahon¹*, Neil S. Davies¹, David J...accumulations of laterally-extensive, sheet-like sandstone strata with minimal mudrock; a depositional style...The ?Ediacaran-Cambrian Series Rouge of northern France and the Channel Islands is a rare example of a |
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| Complex: late Pentevrian plutonism in Penthievre, Brittany. S.C. GRIMMER and P.A. FLOYD: Geochemical features...Rhenohercynian basin and of post-orogenic (New Red Sandstone and Mesozoic) basin-infilling. Cornubian terrain...Dartmouth Beds rather than the top. In the New Red Sandstone the palynomorphs are increasingly regarded as...(Warrington 1979). Miospores from the New Red Sandstone in South Devon include derived Devonian and Carboniferous...Dinantian contains the shallow-water Crocadon Sandstone - a deltaic deposit and flysch sediments deposit |
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| Complex: late Pentevrian plutonism in Penthievre, Brittany. S.C. GRIMMER and P.A. FLOYD: Geochemical features...Rhenohercynian basin and of post-orogenic (New Red Sandstone and Mesozoic) basin-infilling. Cornubian terrain...Dartmouth Beds rather than the top. In the New Red Sandstone the palynomorphs are increasingly regarded as...(Warrington 1979). Miospores from the New Red Sandstone in South Devon include derived Devonian and Carboniferous...Dinantian contains the shallow-water Crocadon Sandstone - a deltaic deposit and flysch sediments deposit |
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| Cadomian terranes in the North Armorican Massif, France. Precambrian of the Bohemian Massif, Central Europe...Cadomian terranes in the North Armorican Massif, France 57 60 60 60 60 61 61 62 62 63 65 R. A. STRACHAN...ROACH and P. J. TRELOAR Dal op Introduction St. Brieuc terrane (SBT) 5.2.1 Pre-Cadomian Icartian basement...mylonite zones 11.3.9 ‘Eocambrian’ succession 11.3.10 Saint John Group 11.4 Regional correlations References...eastern Canada and Newfoundland, Spain, northwest France, Czechoslovakia and southern Britain (Figure 1 |
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| Photograph shows rhythmically interbedded shale and sandstone overlying medium- to thin-bedded sandstones that...The Cadomian Orogeny Revisited in Northern Brittany (France).................00204. E. Egal, C. Guerrot...an Active Plate Margin: North Armorican Massif, France..... R. A. Strachan, R. S. D’Lemos, and R. D. Dallmeyer...with southern Britain and the Armorican Massif of France to the east. In each of these regions, typically...documenting peri-Gondwanan terranes from Florida to France and, Vil Preface Vill finally, by several |
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| J. T. Renouf, of Jersey, about the geology of Brittany. Some interesting comparisons with the geology...impetus to the Society's expressed wish to visit Brittany and we thank him for his excellent paper. The...south-west England southern margin of the Old Red Sandstone continent across a series of strike-fault controlled...basement on the coast at Jospinet northeast of St. Brieuc (fig. 1) to which he gave the name Table of Contents...band included the original Pentevrian of tie St. Brieuc region. Radiometric dating from 1965 onward proved |
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| by Glaessner & Walter (1975) from the Arumbera Sandstone in central Australia, is now known from at least...England, France and Newfoundland. 2. Basic description Specimens from the Arumbera Sandstone are rather...the U.K. and Newfoundland, and about twenty from France, mostly from field photographs to conserve in situ...impressions on fine-grained upper surfaces of sandstone beds that often exhibit a low relief of mounds...of pale green, well-cemented, fine tuffaceous sandstone with casts of ridges and spheroid impressions |
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| suture in N America, southern Britain and northern France many of the igneous rocks of the accreted terranes...suture in N America, the British Isles and northern France, where many of the igneous rocks underwent or were...associated with thick sequences of sub-aqueous sandstone and shale (Table 1, column 5). Sparse chemical...sequence of alluvial and shallow-marine feldspathic sandstone, dolomite and glaciogenic sedimentary rocks (R6shoff...basalt and rhyolite interbedded with fossiliferous sandstone, siltstone and conglomerate. The lavas are chemically |
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| geosynclinal areas such as southern Scotland, Wales and Brittany, and of the drift derived from them most of these...various Hercynian massifs (Brittany, Ardennes-Rhineland, the Massif Central of France) near or within which...of the great east-west dislocation of southern Brittany. One such rock collected by Dunning from the banks... 143) emphasizes that he knows of no rocks in Brittany like them, especially in the distinctive presence...the typical " schist hones " has been found in Brittany, the thin section of one of the quartzite types |
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| with the adjacent French mainland of Normandy and Brittany. Their importance to British geologists lies principally...comparisons and contrasts with those of both Britain and France. This book describes the geology of Jersey (Figure...but it is present in Normandy and Brittany, particularly near St Brieuc. Cogné (1959) gave the name Pentevrian...Pentevrian to the rocks near St Brieuc that have yielded dates of 1200 to 900 Ma (Leutwein and Sonet, 1965;...unknown thickness is widely exposed in Normandy and Brittany, and is * DrN. J. Snelling comments: Rb:Sr determinations |
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| the adjacent French 1nainland of Normandy and Brittany. Their importance to British geologists lies principally...comparisons and contrasts with t hose of both Britain and France. This book describes the geology of Jersey (Figure...but it is present in Normandy and Brittany, particularly near St Brieuc. Cogne ( 1959) gave the name Pentevrian...Pentevrian to the rocks near St Brieuc that have yielded dates o f 1200 to 900 Ma (Leutwein and Son et...t hick ness is widely exposed in Normandy and Brittany , and is • Dr N . J . Sr1elling comments : Rb:Sr |
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| Ness ignimbrites Caithness sandstone ArgyUshire dykes John O'Groats Sandstone Shetland Sst. & Lavas Hoy...Hoy lavas Shetland lavas Eday Sandstone Kishorn-Moine metased. Sardet L.ORS Borrolan Syenite, Loch Ailsh...Island overprint Tourmakeady & Glensaul Foyers sandstone Jedburgh Upper ORS Burntisland & Kinghorn Clyde...(BZ) (AG1) (MW) Legend as Table 1 ORS = Old Red Sandstone Age 260 270 280 320 320 320 320 320 350 350 398...dolerites Kvamshesten Sandstone Hornelen Sandstone (A) Hhsteinen (A) Hitra Sandstone Fongen-Hyllingen P2 |
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| Portugal* Thouars Massif, France M. de Chateaupanne Fm., France Erquy Volcanics, France Arenig Sandst., Poland...Silurian (to earliest Devonian?) Ringerike Old Red Sandstone of southern Norway (Douglass 1988). Early D e...Thermal demagnetization studies of the Old Red Sandstone of the Anglo-Welsh cuvette. Journal of Geophysical...N. 1988. Paleomagnetism of Ringerike Old Red Sandstone and related rocks, southern Norway: Implications...the Erquy Spilite Series, and the Tr6gastel-Ploumanac'h granite complex, Armorican Massif (France and |
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| ................................ Normandy and Brittany..................................................................... Montaigne Noire, southern France..................................................quartzite has been derived, or on an intervening sandstone and conglomerate, the Torridonian, which itself..... Basal sandstone and conglomerate Unconformity. Lewisian gneiss or Torridonian sandstone. 30 40-50...those found in western Newfoundland and in the Saint Lawrence Valley, as well as in the region east of |
 | Breheny, C., Moore, K. R., Costanzo, A., Feely, M. (2016) Reconstruction of an Ordovician seafloor volcanohydrothermal system: a case study from the Copper Coast, southeastern Ireland using field, geochemical and fluid inclusion data. Mineralogical Magazine, 80 (1) 157-174 doi:10.1180/minmag.2015.079.7.09 | Journal (article/letter/editorial) |
| weathered surfaces. (c) Pyrite nodules in coarse sandstone layers, interbedded with siltstones and fine sandstones...Disaggregation indicates that the host siltstone and fine sandstone was broken along individual grain boundaries and...Ordovician volcano-sedimentary sequence of Erquy (Brittany, France). Contributions to Mineralogy and Petrology |
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| similar to those of the Central Armorican zone in France, and the Moldanubian zone. The latter comprises...glacio-marine sediments in the Spanish Peninsula, northern France, and the Bohemian Massif could be taken as evidence...contradictory results from coeval sequences in northern France, which indicate either intermediate (45° south...(preAcadian) magnetization directions in Lower Old Red Sandstone of south Wales (UK). Geophysical J Int 108 : 883—894...deformed red beds of the Pont-Rean formation, Brittany, France. J Geophys Res 93 : 13673—13687 Copper P (1986) |
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| southern extension of the coastal plain Old Red Sandstone sediment which though unexposed can be assumed...volcanic rocks and 2-2.5km as Lower Devonian/Old Red Sandstone, leaving some 2km to be explained by Lower Palaeozoic...molasse sediments from the north spread Old Red Sandstone sediments across the by now denuded highland of...R.L. 1975. Source rocks of the Lower Old Red Sandstone: the Llanishen Conglomerate of the Cardiff area...ECORS, 1986. Deep seismic profiling between England France and Ireland. Journal of the Geological Society |
