CONTENTS

BECKINSALE, R. D. see Wadge et al. BELL, J., HOLDEN, J., PETTIGREW, T. H. and SEDMAN, K. W. The Marl Slate and Basal Breccia at Middridge, Co. Durham ... BERTENSHAW, M. p. Temperature time-lags in limestone groundwaters of the southern Pennines: a discussion BRASIER, c. j. see Brasier, M. D. BRASIER, M. D. and BRASIER, C. J. Littoral and fluviatile facies in the 'Kellaways Beds' on the Market Weighton swell CATT, j. A. see Madgett and Catt CREANEY, S. Petrographic textures and vitrinite reflectance variation on the Alston Block, north-east England ... FERGUSON, j. Some aspects of the ecology and growth of the gigantoproductids FLETCHER, B. N. see Knox and Fletcher GALE, N. H. see Wadge et al. GEORGE, T. N. Eustacy and tectonics: sedimentary rhythms and stratigraphical units in British Dinantian corre• lation GREENSMITH, J. T., RAWSON, P. F. and SHALABY, S. E. An association of minor fining-upward cycles and aligned gutter marks in the Middle Lias (Lower ) of the Yorkshire coast ... HAMILTON, G. Calcareous nannofossils from the Upper Callovian and Lower Oxfordian (Jurassic) of Staffin Bay Isle of Skye, Scotland HIGGINS, A. c. see Varker and Higgins HOLDEN, j. see Bell et al. HOLLIDAY, D. w., NEVES, R. and OWENS, B. and palynology of early Dinantian (Carboniferous) strata in shallow boreholes near Ravenstonedale, Cumbria ... JEFFERSON, D. p. Cyclic sedimentation in the Holkerian (Mid• dle Visean) north of Settle, Yorkshire JONES, j. M. and SCOTT, P. W. Progress report on fossil fuels - exploration and exploitation KENT, p. E. Subsidence and uplift in East Yorkshire and Lincolnshire: a double inversion KNOX, R. w. O'B. and FLETCHER, B. N. Bentonites in the lower D Beds (Ryazanian) of the Speeton Clay of Yorkshire LEEDER,)M.|R.|and|NAMi,|M.|Sedimentary models for the non- marine Scalby Formation () and evi• dence for late Bajocian/ uplift of the York• shire Basin MADGETT, P. A. and CATT, j. A. Petrography, stratigraphy and weathering of late Pleistocene tills in East Yorkshire, Lincolnshire and north Norfolk iii CONTENTS

page MAGRAW, D. New boreholes into Permian beds off North­ umberland and Durham... 157 METCALFE, 1. see Turner et al. MILLWARD, D. Variation within three ignimbrite units from the Borrowdale Volcanic Group ...... 595 NAMI, M. see Leeder and Nami NEVES, R. see Holliday et al. OATES, M. J. A revised stratigraphy for the western Scottish Lower Lias 143 OWENS, B. see Holliday et al. PETTIGREW, T. H. see Bell et al. PITTY, A. Temperature time-lags in limestone groundwaters of the southern Pennines: a reply ...... 550 PYRAH, B. J. Catalogue of type and figured fossils in the Yorkshire Museum: Part 4 415 RAWSON, P. F. see Greensmith et al. ROBSON, D. A. Laboratory experiments on the abrasion of detrital quartz grains ...... 217 RUNDLE, C. C. see Wadge et al. SCOTT, P. W. see Jones and Scott SEDMAN, K. W. see Bell et al. SHALABY, s. E. see Greensmith et al. SMITH, E. G. see Wood and Smith SOMERVILLE, 1. D. Minor sedimentary cyclicity in late Asbian (upper D1) limestones in the Llangollen district of North Wales 317 SOMERVILLE, 1. D. A sedimentary cyclicity in early Asbian (lower D1) limestones in the Llangollen district of North Wales 397 TARLING, D. H. see Turner et al, TAYLOR, P. D. A Jurassic ctenostome bryozoan from York­ shire 211 TAYLOR, P. D. Stomatopora Voigtiana (King 1850): a cyclo­ stome bryozoan from the Permian ofCo. Durham 621 TAYLOR, R. J. The distribution of calcareous nannofossils in the Speeton Clay (Lower ) ofYorkshire ... 195 TURNER, P. METCALFE, 1. and TARLING, D. H. Palaeomagnetic studies ofsome Dinantian limestones from the Craven Basin and a contribution to Asbian magneto­ stratigraphy ...... 371 TURNER, R. E. and WADGE, A. J. Acritarch dating of Arenig volcanism in the Lake District ... 405 VARKER, w. J. and HIGGINS, A. c. Conodont evidence for the age of the Pinskey Gill beds of Ravenstonedale, north-west England 357 IV CONTENTS

page WADGE, A. J., GALE, N. H., BECKINSALE, R. D. and RUNDLE, C. C. A Rb-Sr isochron for the Shap Granite ...... 297 WADGE, A. J. see Turner and Wadge WILSON, C. D. v. A seismic survey ofthe former channel ofthe River Doe, Ingleton ... 617 WILSON, P. Quartz overgrowths from the Millstone Grit sandstones (Namurian) of the southern Pennines as revealed by scanning electron microscopy ...... 289 WINKELMOLEN, A. M. Size, shape and density sorting ofbeach material along the Holderness coast, Yorkshire ... 109 WOOD, C. J. and SMITH, E. G. Lithostratigraphical classi­ fication ofthe Chalk in North Yorkshire, Humberside and Lincolnshire ... 263 Annual Report for 1977 307 Annual Report for 1978 539 Field Meetmgs 1977 185 Obituary ... 315 Index to Volume 42 627

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