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Glan Group

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Journal Article
Published: 01 September 2002
Geological Magazine (2002) 139 (5): 541–558.
...) and the northern Vosges (eastern France) at 100–150 km distance south of the Saar–Nahe Basin. Six tuff beds from the Jeckenbach and Odernheim subformations (Meisenheim Formation, Glan Group) have been correlated within the basin over a distance of 50 km by mapping and whole-rock geochemical fingerprinting. In each...
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Journal Article
Published: 01 September 2007
Micropaleontology (2007) 53 (5): 421–429.
...D. M. Williams Abstract Since the description of Tetracyclus lacustris Ralfs (= Tetracyclus glans (Ehrenb.) F.W. Mills), many new varieties and forms of it have been described. Examination of specimens, using scanning electron microscopy, has demonstrated that some should be recognised as species...
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Journal Article
Published: 01 July 2011
Journal of Foraminiferal Research (2011) 41 (3): 230–247.
... changed. Q-mode cluster analysis showed that four main thecamoebian strains and species ( Centropyxis constricta “aerophila” , Centropyxis aculeata “discoides” , Cucurbitella tricuspis, Difflugia oblonga “glans” ) significantly influence assemblage composition. The study suggests that thecamoebians...
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Series: Geological Society, London, Engineering Geology Special Publications
Published: 01 January 2017
DOI: 10.1144/EGSP28.6
EISBN: 9781786203038
... scarps, fissures and grabens obliquely cross the interfluves of glacially incised valleys in the South Wales Coalfield. Strong sandstones of the Pennant Sandstone Formation of the Warwickshire Group cap the moorland plateaux, while weaker Middle and Lower Coal Measures shales, mudrocks and coals underlie...
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Series: The Micropalaeontological Society, Special Publications
Published: 01 January 2010
DOI: 10.1144/TMS004.11
EISBN: 9781862396227
... in the Pennington BH are lithologically comparable to the upper part of parasequence D in the SW sector. The base of the Colwell Bay Member has long been recognized as a major transgressive surface, which initiates the only fully marine depositional environment in the Solent Group. There are indications...
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Journal Article
Published: 01 October 2001
Mineralogical Magazine (2001) 65 (5): 665–674.
... is distinctive among aenigmatite-group minerals in the high proportion of Fe 3+ in tetrahedral coordination and is unique in its Be content, substantially exceeding 1Be per formula unit. Given the cation distributions in other minerals related to aenigmatite, we think it is reasonable to assume that at least one...
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Journal Article
Published: 01 May 2017
European Journal of Mineralogy (2017) 29 (2): 295–306.
.... The eight strongest lines of the powder X-ray diffraction pattern are ( I–d (Å)– h k l ): 12–5.89–002, 12–3.007–431, 47–2.950–004, 100–2.75–432, 76–2.594–522, 35–2.459–620, 10–2.324–144, 28–1.6224–672. Cyprine is tetragonal, space group P 4/ n , unit-cell parameters refined from the powder data...
Journal Article
Published: 01 February 2001
Quarterly Journal of Engineering Geology and Hydrogeology (2001) 34 (1): 51–64.
... and 8 m high. Geologically, Pen-y-Clip comprises a core of igneous rocks associated with the Penmaenmawr intrusion of Upper Ordovician age. It intrudes dark grey silty mudstones of the Nant Ffrancon Subgroup of the Ogwen Group of mid-Ordovician age. The intrusion measures approximately 3 km by 1 km...
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Series: Geological Society, London, Special Publications, Geological Society, London, Special Publications
Published: 01 January 2005
DOI: 10.1144/GSL.SP.2003.207.01.02
EISBN: 9781862394896
... importance in adding to our knowledge of Earth processes. Perhaps it was Edward Lhwyd, who took over from Plot, who is the more likely candidate for the title of ‘Father of Palaeontology’. Lhwyd was born at Glan Ffraid in the parish of Llanfihangel Geneu’r in Cardiganshire. He enteredJesus College...
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Journal Article
Published: 01 August 2002
Quarterly Journal of Engineering Geology and Hydrogeology (2002) 35 (3): 247–256.
... et al. 1984 at Pont Glan y Wern in the Vale of Clwyd and at Dyto in the Conwy Valley. However, as far as can be determined, no previous record exists in the published literature of the impressive and remarkably uniform sequence of Rûg Silts that accumulated in glacial Llyn Edeirnion. At Melin...
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Journal Article
Journal: AAPG Bulletin
Published: 01 September 1934
AAPG Bulletin (1934) 18 (9): 1132–1159.
...L. M. Cline ABSTRACT On the south and southwest flanks of the Ozark dome the middle Mississippian Osage group, where fully represented, comprises, from bottom to top, the St. Joe, the Reeds Spring (in part the Grand Falls chert), the Burlington, the Keokuk, and the Warsaw formations. Heretofore...
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(a) Distribution of Upper Carboniferous and Lower Permian strata in the Saa...
Published: 01 September 2002
Figure 1. (a) Distribution of Upper Carboniferous and Lower Permian strata in the Saar–Nahe Basin and location of the study area; (b) distribution of the Glan Group (replacing the former Kusel, Lebach and Tholey groups) in the northeastern part of the basin. Major structural elements include NE
Journal Article
Published: 01 February 2015
Mineralogical Magazine (2015) 79 (1): 33–49.
... for reducing the effect of outliers independently reproduce this steeper trend. The ‘diversity index’ D of an element is defined as the ratio of observed mineral species to those predicted from this trend. D separates elements into three groups. More than half of the elements (40 of 70) have D = 0.5–2.0. Apart...
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Journal Article
Published: 01 September 2019
European Journal of Mineralogy (2019) 31 (5-6): 1033–1046.
... (HM), ideally Fe 4 3 + (PO 4 ) 3 (SO 4 )(OH)(H 2 O) 10 · n H 2 O. Bohuslavite is triclinic, space group P 1 ¯ , with a = 13.376(3), b = 13.338(3), c = 10.863(4) Å, α = 92.80(2), β = 91.03(2), γ = 119.92(2)°, V = 1675.7(9) Å 3 , Z = 2 (sample BdV). The crystal structure was solved and refined to R 1...
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Journal Article
Published: 14 February 2017
European Journal of Mineralogy (2017) 29 (5): 889–896.
...), uniaxial negative. Oxy-foitite belongs to the trigonal crystal system, space group R 3 m , a = 15.9387(3) Å, c = 7.1507(1) Å and V = 1573.20(6) Å 3 , Z = 3. The crystal structure of oxy-foitite was refined to R 1 = 1.48% using 3247 unique reflections from single-crystal X-ray diffraction using Mo K α...
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Journal Article
Published: 01 April 1999
Journal of the Geological Society (1999) 156 (2): 301–316.
... > 1000 m of lavas and tuffs that define the Llanbedrog Volcanic Group. This Llanbedrog volcanism evolved from intermediate to acid compositions, with early basaltic trachyandesites (Penmaen Formation) followed by up to 275 m of rhyodacites (Foel Ddu Rhyodacite Formation) and climaxing with up...
Journal Article
Published: 01 January 2009
European Journal of Mineralogy (2009) 21 (1): 65–78.
...Robert Krickl; Manfred Wildner Abstract Four new representatives of the natrochalcite structure type s.s. – A + Me 2+ 2 ( X 6+ O 4 ) 2 [(H 2 O)(OH)], monoclinic, space group C 2/ m , Z = 2 – with A + = Na or K, Me 2+ = Co or Ni, and X 6 + = S or Se, were structurally characterised in Part I...
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Journal Article
Published: 01 April 2002
American Mineralogist (2002) 87 (4): 501–513.
... Be 1.00 Si 3.00 )O 15 (simplified formula), space group P 2/ n , a = 9.915(2), b = 11.368(2), c = 9.617(2), b = 109.30(2)°, Z = 4, wR ( F 2 ) = 0.074 for 4876 independent reflections. The refined site occupancies agree well with the chemical composition determined by electron microprobe analysis...
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Journal Article
Published: 01 October 2001
American Mineralogist (2001) 86 (10): 1219–1230.
... of the OH stretching vibration display 14 discernible, partly superimposing, and strongly anisotropic absorption bands between 3470 and 3680 cm −1 , which are caused by structurally incorporated hydroxyl groups. The polarization behavior observed for individual samples complies with orthorhombic, monoclinic...
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Journal Article
Published: 01 April 2000
Journal of Foraminiferal Research (2000) 30 (2): 135–142.
... limnological signals including anthropogenic contamination will be masked. This is a disappointing result as the utility that has been developed for the group as a limnological indicator in temperate lakes does not appear to apply in a significant proportion of low latitude lakes. 10 12 1999 18 12...
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