JOURNAL OF THE GEOLOGICAL SOCIETY Volume 150 1993 Chief Editor: Dr M. J. Le Bas Editors: Dr J. R. Andrews, Dr D. Barr, Dr K. H. Brodie, Dr J. A. Evans, Dr I. J. Fairchild, Dr N. B. W. Harris, Dr A. J. Maltman, Dr S. G. Molyneux, Dr G. J. Nichols, Dr R. A. Scrutton, Dr N. J. Soper, Dr W. E. G. Taylor, Dr J. R. Underhill, Dr W. J. Wadsworth. Advisory Editors: Dr J. D. Bell, Professor M. Brooks, Professor F. W. Cambray, Dr L. R. M. Cocks, Dr J. C. W. Cope, Professor I. W. D. Dalziel, Dr P. L. Hancock, Dr R. T. Haworth, Professor J. D. Hudson, Dr D. Robinson, Professor A. Taira, Dr P. A. Zeigler. But if any human being earnestly desire to push on to new discoveries instead of just retaining and using the old; to win victories over Nature as a worker rather than over hostile critics as a disputant; to atain, in fact, clear and demonstrative knowledge instead of attractive and probable theory; we invite him as a true son of Science to join our ranks. [Bacon, Novum Organum, Prefatio. 1620] Report by Mantell on two meetings of the Geological Society. 3 December 1845. [I] read a paper on the Wealden strata of the Isle of Wight. [There was] a full attendance; but my paper was put off till ten o’clock, owing to a long desultory discussion . . . upon rolled blocks of coal! Sad twaddling indeed. [The President] obliged [me] to omit half my paper and read the remainder very hurriedly. Broke my large thigh-bone of the Iguanodon in the carriage. 17 December 1845. Professor Owen read a paper to shew that the bird’s bone I had described upon his authority as a tarsi-metatarsal bone of a wader, was the lower extremity of the humerous; a statement I had always made . . . Now he concludes that it is the humerous of a pterodactyles and not of a bird, and that all the other bones of the Wealden ‘birds’ are pterodactylian: as rash a conclusion as a former one. . . . Dr Buckland as a matter of course . . . got up and entirely agreed in all Professor Owen stated. I then rose, and stating the real facts of the question, condemned the present sweeping conclusion as being as rash as his previous one: for though it is probable . . . the bones may be Pterodactyles, there is no proof they may not belong to birds: the specimens are all too imperfect . . . [in Curwen, E. C. 1940. The journal of Gideon Manitell, surgeon and geologist. OUP] 1993 THE GEOLOGICAL SOCIETY BURLINGTON HOUSE PICADILLY LONDON WIV 0JU Contents and Index compiled by Dr C. J. Burton Journal published and distributed by GEOLOGICAL SOCIETY PUBLISHING HOUSE, Unit 7, Brassmill Enterprise Centre, Brassmill Lane, Bath BA1 3JN Printed in Northern Ireland at THE UNIVERSITIES PRESS (BELFAST) LTD, Alanbrooke Road, Belfast BT6 9HF © GEOLOGICAL SOCIETY OF LONDON 1993 Dates of issue of Volume 150 Part 1 (for January): pages 1-208 4 January 1993 Part 2 (for March): pages 209-416 16 February 1993 Part 3 (for May): pages 417-608 11 May 1993 Part 4 (for July): pages 609-800 22 June 1993 Part 5 (for September): pages 801-1008 20 September 1993 Part 6 (for November): pages 1009-1200 3 November 1993 CONTENTS page ABDELSALAM, M.G. & STERN, R.J. Structure of the late Proterozoic Nakasib suture, Sudan 1065 ——. Tectonic evolution of the Nakasib suture, Red Sea Hills, Sudan: evidence for a late Precambrian Wilson cycle 393 ALDRIDGE, R.J. JEppsson, L. & DorninG, K.J. Early Silurian oceanic episodes and events 501 ALLEN, J.R.L. Sedimentary structures: Sorby and the last decade 417 ALLEN, M.B. See ZHANG, C. Atsop, G.I. & Hutton, D.H.W. Caledonian extension in the north Irish Dalradian: implications for the timing and activation of gravity collapse 33 Anprews, J.E. See WriGut, V.P. Aronson, J.L. See EBINGER, C.J. Ates, A, & Kearey, P. Deep structure of the East Mendip Hills from gravity, aeromagnetic and seismic reflection data ——., Structure of Blackdown pericline, Mendip Hills, from gravity and seismic data ATHERTON, M.P. Granite magmatism Barton, J.M. Jr See Moyes, A.B. Beeson, J. See Harris, L.B. BELL, B.R. & PANKHURST, R.J. Sr-isotope variations in a composite sill: crystal-liquid processes and the origin of the Skye granites BESTLAND, E.A. & RETALLACK, G.J. Volcanically influenced calcareous palaeosols from the Miocene Kiahera Formation, Rusinga Island, Kenya BICKFORD, M.E. See NoRDGULEN, @. Birp, R.T. See SEARLE, R.C. Biack, R. & LieGeots, J.-P. Cratons, mobile belts, alkaline rocks and continental lithospheric mantle: the Pan-African testimony Bosence, D.W.J. See Dart, C.J. BosworTtH, W. & Maurin, A. Structure, geochronology and tectonic significance of the ncrthern Suguta Valley (Gregory Rift), Kenya Bott, M.H.P. Modelling the plate-driving mechanism BoxaLL, S.R. See GRocHowski, N.T.L. Briccs, D.E.G., KEAR, A.J., MARTILL, D.M. & Witsy, P.R. Phosphatization of soft-tissue in experiments and fossils BropiE, J.A. See UNDERHILL, J.R. BROMLEY, A.V. See CHEN, Y. Brooks, M., HILLIER, B.V. & MiLiorizos, M. New seismic evidence for a major geological boundary at shallow depth, N Devon Brown, M. P-T-t evolution of orogenic belts and the causes of regional metamorphism Brun, J.P. See Soxoutis, D. Buck, S.G. See PoLtarD, J.E. CesriA, J.M. See Lorez-Ruiz, J. CHADWICK, R.A. Aspects of basin inversion in southern Britain ——., See Evans, D.J. ——, Evans, D.J. & Ho.ttipay, D.W. The Maryport fault: the post-Caledonian tectonic history of southern Britain in microcosm CHARNLEY, N.R. See Myers, J.S. CHEN, Y., CLARK, A.H., FARRAR, E., Wasteneys, H.A.H.P., HopGson, M.J. & BRomLey, A.V. Diachronous and independent histories of plutonism and mineralization in the Cornubian Batholith, southwest England CLAEssON, S. See STEPHENS, M.B. Ciark, A.H. See CHEN, Y. Crayton, C.J. Deflection versus reflection of sediment gravity flows in the late Llandovery Rhuddnant Grits turbidite system, Welsh Basin Contents Cocks, L.R.M. Triassic pebbles, derived fossils and the Ordovician to Devonian palaeogeography of Europe 219 —— & McKerrow, W.S. A reassessment of the early Ordovician ‘Celtic’ brachiopod province 1039 CoLEMAN, T.B. See FLETCHER, C.J.N. Co.uins, M.B. See Grocuowskl, N.T.L. ——, See McLaren, P. CorFIELD, R.M. See GALE, A.S. Corru, F. See Ouiver, G.J.H. CornweLL, J.D. & Smit, I.F. A possible concealed granite beneath part of Anglesey, North Wales 83 Crame, J.A., PirriE, D., Crampton, J.S. & Duane, A.M. Stratigraphy and regional significance of the Upper Jurassic-Lower Cretaceous Byers Group, Livingston Island, Antarctica 1075 Crampton, J.S. See CRAME, J.A. CRAWFORD, M.B. See PETTERSON, M.G. DALLMEYER, R.D. & TuckER, R.D. U-Pb zircon age for the Lagoa augen gneiss, Morais complex, Portugal: tectonic implications, with discussion by A. RIBEIRO, F. PEREIRA & F. MARQUES 405 ——, See Tucker, R.D. Dart, C.J., BosenceE, D.W.J. & McCtay, K.R. Stratigraphy and structure of the Maltese graben system 1153 Dicxin, A.P. See THompson, R.N. Dostas, M. See Lorez-Ruiz, J. Doc.ioni, C. Geological evidence for a global tectonic polarity 991 Donato, J.A. A buried granite batholith and the origin of the Sole Pit Basin, UK Southern North Sea 255 Duane, A.M. See Cram), J.A. DorninG, K.J. See ALDRIDGE, R.J. DUEBENDORFER, E.M. See ROWELL, A.J. DunninG, G.R. See PEDERSEN, R.B. Eaton, G.P. See WiLtiAMs, G.D. EBINGER, C.J., YEMANE, T. WOLDEGABRIEL, G., ARONSON, J.L. & WALTER, R.C. Late Eocene—Recent volcanism and faulting in the southern main Ethiopian rift Exes, C. Bedload-transported pedogenic mud aggregates in the Lower Old Red Sandstone in southwest Wales Evans, D.J., Rees, J.G. & Hottoway, S. The Permian to Jurassic stratigraphy and structural evolution of the central Cheshire Basin ——, Row.ey, W.J., CHApwick, R.A. & MILLWARD, D. Seismic reflections from within the Lake District batholith, Cumbria, northern England ——., See CHADWICK, R.A. FARRAR, E. See CHEN, Y. FLETCHER, C.J.N. SWAINBANK, I.G. & CoLmAN, T.B. Metallogenic evolution in Wales: constraints from lead isotope modelling 77 FLoyp, P.A. Geochemical discrimination and petrogenesis of alkalic basalt sequences in part of the Ankara melange, central Turkey 541 Fortey, R.A. Charles Lapworth and the biostratigraphic paradigm 209 Fursicu, F.T. & OscHMANN, W. Shell beds as tools in basin analysis: the Jurassic of Kachchh, western India 169 GALE, A.S., JENKyNs, H.C., KENNEDY, W.J. & CorrieLp, R.M. Chemostratigraphy versus biostratigraphy: data from around the Cenomanian—Turonian boundary Gao, S. See McLaren, P. GARDEWEG, M. See Sparks, R.S.J. Gawrtuorre, R.L. & Hurst, J.M. Transfer zones in extensional basins: their structural style and influence on drainage development and stratigraphy 1137 Gipson, P.J. & Lyte, P. Evidence for a major Tertiary dyke swarm in County Fermanagh, Northern Ireland, on digitally processed aeromagnetic imagery 37 Gipson, S.A. See THompson, R.N. GILL, R.C.O. See Myers, J.S. Contents Gover, B.W., Powe L, J.H. & Waters, C.N. Etruria Formation (Westphalian C) palaeoenvironments and volcanicity on the southern margins of the Pennine Basin, South Staffordshire, England GovprING, R. & PoLLarD, J.E. Introduction. Organisms and sediments: relationships and applications ——, See POLLARD, J.E. ——., See TAYLor, A.M. Gower, D.J. See Storrs, G.W. Grocuowskl, N.T.L., CoLtins, M.B., Boxat., S.R. & SALomon, J.C. Sediment transport predictions for the English Channel, using numerical models GROENEWALD, P.B. See Moyes, A.B. HALL, R.P. & HuGues, D.J. Early Precambrian crustal development: changing styles of mafic magmatism HALL, S. See HipBarp, J. Harker, R.I. Fracture patterns in clasts of diamictites (?tillites) Harris, D.H.M. The Caledonian evolution of the Laurentian margin in western Ireland 669 Harris, L.B. & BEEson, J. Gondwanaland significance of Lower Palaeozoic deformation in central India and SW Western Australia 811 Har Ley, A.J. A depositional model for the Mid-Westphalian A to late Westphalian B Coal Measures of South Wales 1121 Hatuway, B. The Nadi Basin: Neogene strike-slip faulting and sedimentation in the fragmented arc, western Viti Levu, Fiji 563 HELLER, F. See Liu, X. Henpry, G.L.See THompson, R.N. HipparpD, J. & HALL, S. Early Acadian sinistral shear in north-central Maine, USA 815 HILuiER, B.V. See BRooxs, M. HI.uis, R.R. Tertiary erosion magnitudes in the East Midlands Shelf, onshore UK 1047 Hopocson, M.J. See CHEN, Y. Ho uipay, D.W. Mesozoic cover over northern England: interpretation of apatite fission track data 657 ——, See CHADWICK, R.A. Ho ioway, S. See Evans, D.J. HorsFALL, J.A.C. See MILLER, J.A. Hoyas, M. See Lopez-Ruiz, J. Hucues, D.J. See HALL, R.P. Hurst, J.M. See GAwTHorpeE, R.L. Hutton, D.H.W. See Atsop, G.I. JENKYNS, H.C. See GALE, A.S. Jeppsson, L. See ALDRIDGE, R.J. Jones, G., SANO, H. & VALsami-Jones, E. Nature and tectonic setting of accreted basalts from the Mino terrane, central Japan KANARIS-SOTIRIOU, R., Morton, A.C. & TAyLor, P.N. Palaeogene peraluminous magmatism, crustal melting and continental breakup: the Erlend complex, Faeroe—Shetland Basin, NE Atlantic Kear, A.J. See Briccs, D.E.G. Kearey, P. See Ates, A. KENNEDY, W.J. See GALE, A.S. Kerr, A.C. Elemental evidence for an enriched small-fraction-melt input into Tertiary Mull basalts, Western Scotland KERSHAW, S. Sedimentation control on growth of stromatoporoid reefs in the Silurian of Gotiand, Sweden KipweLL, S.M. Influence of subsidence on the anatomy of marine siliciclastic sequences and on the distribution of shell and bone beds Kovacn, W.L. Multivariate techniques for biostratigraphical correlation Krocu, T.E. See Ouiver, G.J.H. KULLERUD, K. See STEPHENS, M.B. Latin, D. See WuiteE, N. Leat, P.T. See THompson, R.N. Contents Lesuiz, A.B., Spiro, B. & Tucker, M.E. Geochemical and mineralogical variations in the upper Mercia Mudstone Group (Late Triassic), southwest Britain: correlation of outcrop sequences with borehole geophysical logs LéveauE, F. Correlating the Eocene—Oligocene mammalian biochronological scale from SW Europe with the marine magnetic anomaly sequence Li, Z.X. See TRENCH, A. LieGeois, J.-P. See BLack, R. LisLe, R.J. Strike-slip motion in the Minches, NW Scotland, deduced from the trends of the Scourie Dyke swarm Liu, T. See Liu, X. Liu, X., SHAw, J. Liu, T. & HELLER, F. Magnetic susceptibility of the Chinese loess-palaeosol sequence: environmental change and pedogenesis LonERGAN, L. & SCHREIBER, B.S. Proximal deposits at a fault-controlled basin margin, Upper Miocene, SE Spain Lopez-Ruiz, J., CEBRIA, J.M., DoBLas, M., OyARzuN, R., Hoyas, M. & Martin, C. Cenozoic intra-plate volcanism related to extensional tectonics at Calatrava, central Iberia Lye, P. & Preston, J. Geochemistry and volcanology of the Tertiary basalts of the Giant’s Causeway are, Northern Ireland ——.,, See Gisson, P.J. McCrackEN, S.R. See TRENCH, A. McKerrow, W.S. The development of Early Palaeozoic global stratigraphy ——, See Cocks, L.R.M. ——., See TRENCH, A. McLaren, P., CoLiins, M.B., Gao, S. & Powys, R.I.L. Sediment dynamics of the Severn Estuary and inner Bristol Channel 589 McCay, K.R. See Dart, C.J. Marriott, S.B. & WriGHT, V.P. Palaeosols as indicators of geomorphic stability in two Old Red Sandstone alluvial suites, South Wales 1109 MartILL, D.M. See Briccs, D.E.G. Martin, C. See LopeEz-Ruiz, J. Maurin, A. See Boswortn, W. Miviorizos, M. See Brooks, M. MILLER, J.A., HoRSFALL, J.A.C., PETFoRD, N. & TizaArD, R.H. Proposed methods for correcting external detector fission track counts for tracks lost during etching 1051 MiLLwarD, D. See Evans, D.J. MiTcHELL, A.H.G. Cretaceous—Cenozoic tectonic events in the western Myanmar (Burma)—Assam region 1089 MitcHeELL, J.G. See THompson, R.N. Morrison, M.A. See THompson, R.N. Morton, A.C. See KANARIS-SOTIRIOU, R. Moyes, A.B., Barton, J.M. Jr & GROENEWALD, P.B. Late Proterozoic to Early Precambrian tectonism in Dronning Maud Land, Antarctica: supercontinental fragmentation and amalgamation Myers, J.S., Git, R.C.O., Rex, D.C. & CHARNLEY, N.R. The Cap Gustav Holm Tertiary Plutonic Centre, East Greenland Naar, D.F. See SEARLE, R.C. NEEDHAM, D.T. The structure of the western part of the Southern Uplands of Scotland Nissen, A.L. See NORDGULEN, @. NorDGULEN @., BICKFORD, M.E., Nissen, A.L. & WortMaN, G.L. U-Pb ages from the Bindal Batholith, and the tectonic history of the Helgeland Nappe Complex, Scandinavian Caledonides Ouiver, G.J.H., Corru, F. & KroGu, T.E. U-Pb ages from SW Poland: evidence for a Caledonian suture zone between Baltica and Gondwana Ouivier, P. See PLATZMAN, E.S. Contents OscHMANN, W. Environmental oxygen fluctuations and the adaptive response of marine benthic organisms ——., See Fursicn, F.T. Oyarzun, R. See Lopez-Ruiz, J. PANKHURST, R.J. See BELL, B.R. ——., See Rocers, G. PAviipEs, S. See Soxoutis, D. Pavoni, N. Pattern of mantle convection and Pangaea break-up, as revealed by the evolution of the African plate PEDERSEN, R.B. & DUNNING, G.R. Provenance of turbiditic cover to the Caledonian Solund-Stavfjord ophiolite from U-Pb single zircon dating PerissorATis, C. See VAN ANDEL, T.H. PETFORD, N. See MILLER, J.A. PeTTERSON, M.G., CRAWFORD, M.B. & WINDLEY, B.F. Petrogenetic implications of neodymium isotope data from the Kohistan batholith, North Pakistan PICKERING, K.T. See WIGNALL, P.B. PirrieE, D. See CRAME, J.A. Piatt, J.P. See PLATZMAN, E.S. PLATZMAN, E.S., Piatt, J.P. & OLivieR, P. Palaeomagnetic rotations and fault kinematics in the Rif Arc of Morocco POLLARD, J.E., GOLDRING, R. & Buck, S.G. Ichnofabrics containing Ophiomorpha: significance in shallow-water facies interpretation ——, See GOLDRING, R. Powe LL, J.H. See GLover, B.W. Power, G.M. Geochemical differences between the Cadomian granites of Mancellia and the St Malo migmatites, Armorican Massif, France Powys, R.I.L. See McLaren, P. Preston, J. See LYLE, P. Rees, J.G. See Evans, D.J. Rees, M.N. See Rowe i, A.J. RETALLACK, G.J. See BESTLAND, E.A. Rex, D.C. See Myers, J.S. RiLey, N.J. Dinantian (Lower Carboniferous) biostratigraphy and chronostratigraphy in the British Isles Rocers, G. & PANKHURST, R.J. Unravelling dates through the ages: geochronology of the Scottish metamorphic complexes RONDOYANNI, T. See VAN ANDEL T.H. RowELL, A.J. Rees, M.N., DUEBENDORFER, E.M., WALLIN, E.T., VAN ScHMus, W.R. & Situ, E.I. An active Neoproterozoic margin: evidence from the Skelton Glacier area, Transantarctic Mountains Row ey, W.J. See Evans, D.J. Rupwick, M.J.S. Historical origins of the Geological Society’s Journal Russy, R.I. See SEARLE, R.C. SALOMON, J.C. See GrocHowskI, N.T.L. SANo, H. See Jones, G. SAUNDERS, A.D. See ZHANG, C. SAVAGE, R.J.G. Vertebrate fissure faunas with special reference to Bristol Channel Mesozoic faunas SCHREIBER, B.S. See LONERGAN, L. SEARLE, R.C., BirD, R.T., RussBy, R.I. & Naar, D.F. The development of two oceanic microplates: Easter and Juan Fernandes microplates, East Pacific Rise SELLWoopD, B.W. Structure and origin of limestones SHAw, J. See Liu, X. SKILLING, I.P. Incremental caldera collapse of Suswa volcano, Gregory Rift Valley, Kenya Situ, E.I. See Rowe, A.J. Situ, I.F. See CoRNWELL, J.D. Vili Contents SoxoutTis, D., BRuN, J.P., VAN DEN DRigsscHE, J. & PAVLipDEs, S. A major Oligo-Miocene detachment in southern Rhodope controlling north Aegean extension SpaRKS, R.S.J., STASIUK, M.V., GARDEWEG, M. & Swanson, D.A. Welded breccias in andesite lavas Spiro, B. See Leste, A.B. ——., See WRIGHT, V .P. StrasiukK, M.V. See Sparks, R.S.J. STEPHENS, M.B., KULLERUD, K. & CLAgsson, S. Early Caledonian tectonothermal evolution in outboard terranes, central Scandinavian Caledonides: new constraints from U-Pb zircon dates 51 STERN, R.J. See ABDELSALAM, M.G. StoreY, B.C. The changing face of late Precambrian and early Palaeozoic reconstructions 665 Storrs, G.W. & Gower, D.J. The earliest possible choristodere (Diapsida) and gaps in the fossil record of semi-aquatic reptiles 1103 STRACHAN, R.A. See TUCKER, R.D. SWAINBANK, I.G. See FLETCHER, C.J.N. Swanson, D.A. See Sparks, R.S.J. Swarprick, R.E. Sinistral strike-slip and transpressional tectonics in an ancient oceanic setting: the Mamonia complex, southwest Cyprus TayLor, A.C. See KANARIS-SOTIRIOU, R. Taytor, A.M. & GoLprRING, R. Description and analysis of bioturbation and ichnofabric THompson, R.N., Gipson, S.A., LEAT, P.T., MITCHELL, J.G.. Morrison, M.A., Henpry, G.L. & Dickin, A.P. Early Miocene continental extension-related basaltic magmatism at Walton Peak, northwest Colorado: further evidence on continental basalt genesis TizarD, R.H. See MILLER, J.A. Torsvik, T.H. See TRENCH, A. TRENCH, A., McKerrow, W.S., Torsvik, T.H., Li, Z.X. & McCRAcKEN, S.R. The polarity of the Silurian magnetic field: indication from a global data compilation Tucker, M.E. See Lesuiz, A.B. Tucker, R.D., DALLMEYER, R.D. & STRACHAN, R.A. Age and tectonothermal record of Laurentian basement, Caledonides of NE Greenland ——, See DALLMEYER, R.D. TuRNER, M.S. See WRIGHT, V.P. UNDERHILL, J.R. & Bropig, J.A. Structural geology of Easter Ross, Scotland: implications for movement on the Great Glen fault zone VALSAMI-JONES, E. See JONEs, G. VaN DEN DrigsscHE, J. See Soxoutis, D. VAN ANDEL, T.H., PERISSORATIS, C. & RONDOYANNI, T. Quaternary tectonics of the Argolikos Gulf and adjacent basins, Greece Van ScHMus, W.R. See RowE Lt, A.J. WALLIN, E.T. See RowELL, A.J. Wa ter, R.C. See EBincer, C.J. Wana, G.-R. See ZHANG, C. WastTEneys, H.A.H.P. See CHEN, Y. Waters, C.N. See GLover, B.W. Wuite, N. & Latin, D. Subsidence analyses from the North Sea ‘triple-junction’ WIGNALL, P.B. Distinguishing between oxygen and substrate control in fossil benthic assemblages —— & PickerING, K.T. Palaeoecology and sedimentology across a Jurassic fault scarp, NE Scotland Wisy, P.R. See Briccs, D.E.G. Wikinson, M. Concretions of the Valtos Sandstone Formation of Skye: geochemical indicators of palaeo-hydrology WiuiaMs, G.D. & Eaton, G.P. Stratigraphic and structural analysis of the Late Palaeozoic-Mesozoic of NE Wales and Liverpool Bay: implications for hydrocarbon prospectivity Contents Witson, M. Geochemical signatures of oceanic and continental basalts: a key to mantle dynamics? ——, Introduction: Plate-moving mechanisms: constraints and controversies —— Magmatic differentiation Winb_ey, B.F. Fermor Lecture 1991. Proterozoic anorogenic magmatism and its orogenic connections —— Uniformitarianism today: plate tectonics is the key to the past ——See Petterson, M.G. WOLDEGABRIEL, G. See EBINGER, C.J. Wortman, G.L. See NorDGULEN, @. WriGut, V.P., TURNER, M.S., ANDREwsS, J.E. & Spiro, B. Morphology and significance of super-mature calcretes from the Upper Old Red Sandstone of Scotland ——, See Marriot, S.B. Yamamoto, H. Contrasting metamorphic P-T-time paths of the Kohistan granulites and tectonics of the western Himalayas YEMANE, T. See EBINGER, C.J. ZHAI, M. See ZHANG, C. ZHANG, C., ZHAI, M,. ALLEN, M.B. SAUNDERS, A.D., WANG, G.- R. & HUANG, X. Implications of Palaeozoic ophiolites from Western Junggar, NW China, for the tectonics of central Asia. ZIEGLER, P.A. Plate-moving mechanisms: their relative importance Conference Reports Day, S.J. The structural evolution and mechanics of volcanoes and subvolcanic intrusions Kerr, A.C. Current research in the British Tertiary Igneous Province McGuire, W.J. Volcanic plumbing systems STEWART, I.S. Neotectonics: current themes and future prospects Taytor, K.G. & RurFe._, A.H. Early Cretaceous environments WHATELEY, M.K.G. & Harvey, P.K. Mineral Resource Evaluation 93 Discussions on previously published papers On detrital magmatic muscovite from the Lower Carboniferous of southwest Ireland: buried granites uncovered? [G.D. SEvAsTopuLo; reply by D. Cuipstone & P. Roycrort] On early to mid-Cretaceous tectonics and unconformities of the Wessex Basin (southern England) [E.G. Poo_e; reply by A.H. RuUFFELL] On a geological map of the southern Deccan Traps, India and its structural implications [M.C. Bouter and S.B. MANuM; replies by M.Wippowson and V.S. Kate, H.C. KuLKARNI & V.V. PEsHwa] On the Inishkea Division of northwest Mayo: Dalradian cover rather than pre-Caledonian basement (Ireland) [M.D. Max & J.A. WNCHEsTER; reply by M.J. KENNEDY & J.F. MENUGE] On the location and history of the Walls Boundary fault and Moine thrust north and south of shetland [J.D. Ritcuié & K. HitcHen and J.R. UNDERHILL; reply by D. FLInn]} On new seismic evidence for a major geological boundary at shallow depth, N Devon [M.G. Bassetr & J.C.W. Cope; reply by M. Brooks & M. Miuiorizos]} On petrology of a magma chamber: the Plutonic Complex of Guernsey (Channel Islands, UK) [R.S. D’Lemos; reply by J. DE BREMonD D’ Ars, H. Martin, B. Auvray & C. LecuyErR] On tectonic and climatic control of Triassic sedimentation in the Beryl basin, northern North Sea [P. RICHARDS; reply by L.E. Frostick, T.K. Linsey & I. RErp] ERRATA 149, pp. 251-255, Muir & Mallard, When is a fault extinct? The contents list both on the back of the issue and in the preliminary pages for the volume should have included ‘with a discussion by A. WHITTAKER’ 150, p. 901. The caption for Fig. 6 should read: ‘Photographs of welded breccia bands from levees of Lascar lava, showing (a) matrix-supported deformed breccia band with lenticular fiamme and massive glassy band; (b) slightly deformed clast-supported welded breccia with angular clasts; and (¢c) strongly deformed clast-supported welded breccia.’