 | | Journal (article/letter/editorial) |
| Altenhöferallee 1, D-60438 Frankfurt am Main, Germany. (E-mail: w.franke@em.uni-frankfurt.de). INTRODUCTION...Correlation of the Rheno-Hercynian Variscides between Germany and SW-England has a long-standing tradition (Franke...open questions. MAIN FEATURES COMMON ENGLAND AND GERMANY TO SOUTH-WEST It is largely agreed that the English...(6) Devonian through to Namurian synorogenic greywacke turbidites derived from the active, southern margin...3): Rheno-Hercynian Belt of Central Europe Dill-Lahn autochthon Early Devonian (up to Late Emsian) siliciclastic |
 | | Journal (article/letter/editorial) |
| were to travel 2000 kilometres through Western Germany, set out on the journey which terminated at Cologne...(Massenkalk) of the Frasnian stage were seen in a quarry near Schmidthof. On one bedding plane occur numerous...especially P . pentagona Gold£. At the entrance of the quarry above the mas sive limestone, nodular limestone...reticularis L. and Orthis iwanowi Tschern . In a quarry south of Walheim Station a good secti on of the...shales Vicht conglomerate Red shales, green greywacke, sandstone bank with rich marine fauna. frequent |
 | | Journal (article/letter/editorial) |
| A CROSS-SECTION THROUGH THE WESTERN PART OF THE LAHN SYNCLINE. VI. By Professor Franz Michels VII...(2). Westerwald between Sieg and Lahn. (3). Taunus between the Lahn and the plain of the upper Rhine...several thousand metres of shales, sandy shales and greywacke. The following sub-divisions are usually made...approach of the Coblenzian, and thick quartzites and greywacke sandstones (Throner Quartzite) occur. 3. THE COBLENZIAN...replacing the normal sedimentary facies. In th e Lahn va lley region porphyries occur in the lower par |
 | | Report (chapter) |
| Geowissenschaften der Universitdt, D-35 390 Giessen, Germany (e-mail. wolfgang.franke@geolo.uni-giessen.de)...c Ist S-MARGIN of OLD RED CONTINENT Dill - & Lahn Syncline Taunus ~, ['~,~ .-.....-. iiiii!ili...mid-Devonian to Vis~an volcanism, which extends from the Lahn/Dill area of the Rhenish Massif into the northwestern...Closure of the Rheno-Hercynian Basin is recorded in greywacke turbidites derived from an active margin to the...H6rre-Gommern Zone, N W part. A conspicuous belt of quartz arenites extends over almost 300 km from the Rhenish |
 | | Journal (issue) |
| was shown important exposures in ECC's Greystone Quarry south-east of Launceston, on Brent Tor and in the...taking his B.A. in 1937 he went to Frankfurt in Germany, there to study under Professor Rudolf Richter...training at Frankfurt and the field work in the Rhineland. There he became fluent in German and also devoted...visit to the Ardennes and Eifel areas of West Germany by British geologists interested in Devonian geology...boundary and the problem of the British and Ardennes-Rhineland successions from the upper Famennian to the Namurian |
 | | Journal (issue) |
| sites; they are shown to be mullions in a mica-quartz-schist of distinctive mineralogy, for which radiometric...medium metamorphic grade. The majority A: mica-quartz-schists and highly micaceous quartzites; B: metasiltstones...discussed only after all three have been described. quartz-rich metasediments of low to fall into three...three closely-related sub-groups; — A. Mica-quartz-schists and micaceous quartzites Almost all the hones...HONESTONES (1) silt 137 Grey, lineated psammitic mica-quartz-schists (mullions) of fine sand to coarse grade |
 | | Journal (article/letter/editorial) |
| Leibniz University, Welfengarten 1 D-30167 Hannover, Germany Abstract: In some areas of the Variscan orogen...aligned to them similar in structure but abundant in quartz, plagioclase and mica. Geological mapping and lithochemical...the Hagendorf-Pleystein Pegmatite Province, SE Germany, and present in many ensialic orogens elsewhere...area several lens-shaped rock strongly enriched in quartz are intercalated into the metapelitic basement...metaquartzites were named by the same author as greywacke-quartzite gneiss. Steiner (1986) treated them |
 | | Journal (issue) |
| part of your collection. Fire Opal MINERALS Greywacke, Leucitite, Phyllite, Quartzite GROUNDWORK______________...contain micro crystals of cristobalite, a form of quartz which may conform to either the tetragonal or the...heated, sometimes turning into chal cedony or quartz as the water molecules are driven off. FILE FIRE...yellow J MINERALS p l u s GR co m o m GREYWACKE IS A SEDIMENTARY ROCK WITH ■2. MEDIUM-SIZED...SET IN A BASE OF F1NE- —1 GRAINED CLAY > ZD Greywacke - pronounced ‘graywacky’ - is usually dark grey |
 | | Journal (article/letter/editorial) |
| greywackes and sandstones (Givetian–Visean, Variscides, Germany) as indicators of ultramafic source rocks MARTIN...Braunschweig, Postfach 3329, D-38023 Braunschweig, Germany (Received 11 November 1998; accepted 29 March...Harz Mountains (Famennian–Visean), the Werra greywacke (Frasnian–Famennian) and the Rhenish Slate Mountains...recorded in the Late Devonian South Harz–Selke greywacke (up to 4.1 % of the translucent heavy minerals)...minerals) and in the Early Carboniferous Tanne greywacke (up to 2.7 %). Also in the Rhenish Slate Mountains |
 | | Journal (article/letter/editorial) |
| In general, basin margin silicics are largely quartz-alkali feldspar ± biotite-phyric, vitreous rhyolites...SW England and the Rhenish Massif of northern Germany (e.g. Franke and Engel, 1982; Holder and Leveridge...volcanics are more abundant and better exposed in Germany. Minor silicic rocks occur in the Lower Devonian...Devon, Fig.1) and the Rhenish Massif of northern Germany (Kirchhunden-Hilchenbach region, Fig.1). A representative...deepwater calcareous slates and sandstones of the Lahn-Dill synclines (Flick, 1978; 1979; Flick and Nesbor |
 | | Report (chapter) |
| Siliceous rocks of the Culm Basin, Germany HANS-JI~IRGEN GURSKY Geologisch-Pal~iontologisches Institut...Darmstadt, Schnittspahnstrasse 9, D-64287 Darmstadt, Germany Abstract: The classic Dinantian cherts of the...the Rhenish Massif and Harz Mountains, Germany, were analysed for their petrography and sedimentology. They...spiculitic chert, homogeneous chert, and silicified quartz-trachytic tephra and tuffite are the main chert...metabentonites, limestone turbidites, greywackes and quartz arenites. The siliceous rocks were deposited in |
 | | Journal (article/letter/editorial) |
| cement surrounded by quartz or clay minerals; clay cements surrounded by quartz or carbonate) and simultaneous...Carboniferous and Jurassic sandstones from Sweden and Germany. Transparent and opaque minerals, i.a. feldspars...left side a polycrystalline metamorphic quartz grain. The quartz cement shows the same optical orientation...Bright blue, partly overexposed: K-feldspar. Clastic quartz grains (larger ones perfectly rounded) are showing...distribution and are clearly differentiated from quartz cement 196 W. Vortisch et al. provides a good |
 | | Journal (article/letter/editorial) |
| in., Medium to coarse-grained mica, hornblende,quartz monzonite Coarse to coarse and porphyritic granite...Arkose, areraindrop bedding slate fication and Greywacke Arkose Three Arkose Possibly Arkose Transition...cross- coarse upward base, at WRITER beds tuff quartz stratigranite no quartzite but the the or of stratified...plagidecayed assorted grains feldspars DEPOSITS and mica quartz interlocking matrix and Arkose and of poorly of...rounded OBSERVATION fine angular quartz ARKOSE in and bands less quartz quartz feldspars, less pebbles THE |
 | | Journal (article/letter/editorial) |
| com/locate/jvolgeores Thermo-physical rock properties of greywacke basement rock and intrusive lavas from the Taupo...Technology, Schnittspahnstr 9, 61476 Darmstadt, Germany GNS Science, Wairakei Research Centre, 114 Karetoto...velocity Geothermal systems a b s t r a c t Greywacke of the Waipapa and Torlesse (Composite) Terrane...compressive strength were conducted for selected greywacke samples to quantify their mechanical rock strength...Torlesse-type greywacke exhibit minor rheological differences, with Waipapa-type greywacke having lowest |
 | Pereira, M.F., GutÃerrez-Alonso, G., Murphy, J.B., Drost, K., Gama, C., Silva, J.B. (2017) Birth and demise of the Rheic Ocean magmatic arc(s): Combined U–Pb and Hf isotope analyses in detrital zircon from SW Iberia siliciclastic strata. Lithos, 278. 383-399 doi:10.1016/j.lithos.2017.02.009 | Journal (article/letter/editorial) |
| Eberhard Karls Universität Tübingen, Tübingen, Germany g Instituto de Ciências da Terra de Évora, Departamento...structure exposes strongly deformed phyllites, rare greywacke beds and NU mafic volcanic rocks (Pulo do Lobo...ages 9 ACCEPTED MANUSCRIPT obtained from a greywacke of the Santa Iria Formation, that unconformably...penetrative cleavage and the generation of segregated quartz veins. The vergence of the first phase folds is... pressure solution structures, tight folds and quartz veins (Fig. 4a-e). D3 produced near- IP vertical |
 | | Book |
| by Gloucester Typesetting Co. Ltd. Printed in Germany Contents Translator's Foreword 4 Foreword ...known in some parts of the Continent, including Germany. Ore: Ores are deposits of minerals, which contain...various ways. The well-known minerals feldspar, quartz and mica derive from gases, generally below the...combinations, known as parageneses, e.g. feldspar and quartz. Others exclude each other, e.g. feldspar and rock...pyramids rhombohedron apatite beryl, corundum calcite quartz tourmaline orthorhombic rhombic prisms pyramids |
 | | Journal (article/letter/editorial) |
| other turbidite deposits, thirty-one samples of greywacke from the Normanskill formation near Normanskill...fresh material were collected. was recorded. Greywacke and shale samples were also taken from the Quebec...formation was sampled by collecting from one large quarry in New York state. Several miscellaneous greywackes...persons. Several thin-sections were cut from each greywacke sample and most of the remainder was crushed using...formations. Two formations consisting of shale and greywacke or shale and arkose sequences were selected to |
 | | Book |
| immensely popular handbook of minerals appeared in Germany I obtained a copy fo! my personal library and was...second piece: the flakes are mica, the glassy grains quartz, and the yellowish grains feldspar. The whole specimen...hich feldspar, quartz, and mica are the main constituents. Quartzite consists of quartz only, mica schist...schist of quartz and mica, and eclogite of garnet and augite. There are also rocks which consist of fragments...100,000 years ago, beads made of limestone and quartz were found, and when man began to decorate cave |
 | | Journal (article/letter/editorial) |
| Most orebodies exhibit a close association to quartz-rich felsic volcanies, but some are in dark slates...Fr,ETT, 1911) and the occurrence of associated quartz-keratophyres has been documented (MzDDLETON,1960)...FR~E~IAN VOw I A with SST Slates Coal and Greywacke Shale Higher up" Na+K ~i km Salt - ~ e r 17km...bimodal distribution of Si in volcanic rocks of the Lahn area (data from LEHMA~N,1972). geosynclinal' rise...the marie spilites and albite diabases, and the quartz keratophyres form a distinctly bimodal assemblage |
 | | Journal (article/letter/editorial) |
| established a broken, block structure for the greywacke-limestone complex of the Ankara outcrop, and in...Devonian. It is probable that much of the Ankara greywacke is also Upper Devonian (Nowack, 1928), especially...mainly icith Greywacke, probably Carboniferous to Permian On leaving the overwhelmingly greywacke district...small, set in greywacke, or, in certain areas, as considerable spreads, free of greywacke. The assemblage...to the south-east, a narrower outcrop of mixed greywacke and limestone is exposed, wThich may still be |
 | | Journal (article/letter/editorial) |
| by G. Fischer (1929) from Wippra in the Harz, Germany, have on re-examination by Quitzow been found to...dolcrites from Nassau, viz. nos. 19,043 (Weilburg, Lahn) and 29,657 (Sinn, south of Herborn, Westerwald)...rarely an important constituent of numerous narrow quartz-albite segregation veins which cut the schists...crystalloblastic albite and pumpellyite in schistose greywacke, no. 3172. Colour varies from a very pale green...in this case is approximately equal to that of quartz, brownish-purple or bluish anomalous interference-tints |
 | | Report (volume) |
| basin development (central European Variscides, Germany) FLOYD, P. A., WINCHESTER, J., SESTON, R., KRYZA...D-35390 Giessen, Germany 2 GeoForschungsZentrum Potsdam, Telegrafenberg, D-14473 Potsdam, Germany 3 Geologisches...Freiburg, Albertstrasse 23b, D-79104 Freiburg, Germany Research into the orogenic processes that shaped...Rheno-Hercynian belt of northern Germany (Cocks et al. 1997). In eastern Germany, Avalonian crust extends across...passes east of the Gorlitz area (in easternmost Germany) and Silesia (in southern Poland) not far from |
 | | Report (chapter) |
| the Saxo-Thuringian Zone (NE Bohemian Massif, Germany): age constraints, geotectonic setting and basin...Königsbrücker Landstrasse 159, D-01109 Dresden, Germany (e-mail: ulf.linnemann@snsd.smwk.sachsen.de) Abstract:...granitoid plutons. Ediacaran rock complexes in Germany are restricted to the Saxo-Thuringian Zone in the...rocks occur mainly in the Saxo-Thuringian Zone (Germany) and the Tepla-Barrandian Unit (Czech Republic)...French Central EDIACARAN FROM CADOMIAN BASIN (GERMANY) Massif and the Bohemian Massif, excepting the |
 | | Journal (article/letter/editorial) |
| in England and with the Lower Rotliegendes of Germany and the North Sea. R6sum6 La stratigraphie des...The formation consists of medium to fine grained quartz sandstone, showing aeolian cross-bedding. The sandstones...Sandstone Formation is designated as Locharbriggs North Quarry (NX 810 990) which is still actively worked. There...There, 20 metres of medium to fine grained quartz sandstones are arranged in wedgeshaped and planar tabular...sandstones consist of subrounded to very well-rounded quartz, with less than 5 percent of very wellrounded basalt |
 | | Report (issue) |
| assist the quarry industry in meeting their demands. The statistical information and the quarry list are...material supplied by the Ministry of Commerce. A quarry list and statistics of mineral production are prepared...12 WEARING COURSE AGGREGATE PRODU CTION FROM GREYWACKE SOURCES 13 ARRANGEM ENT OF LIST OF SOURCES OF...colour) alternate with hard shale or slate. The greywacke beds are generally thicker and more massive than...the produc tion of lightweight aggregate. The greywacke agg·regates tend to give fairly good results on |
Greywacke quarry, Nochern, Loreley, Rhein-Lahn-Kreis, Rhineland-Palatinate, Germany