Published by The Geological Society

Volume 169 • Part 2 • March 2012 • ISSN 0016-7649

JOURNAL OF THE

GEOLOGICAL

SOCIETY

JOURNAL OF THE GEOLOGICAL SOCIETY

March 2012

Vol. 169 . Pt 2 . pp. 111–238Jo

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Specials

Parsons, A.J., Michael, N.A., Whittaker, A.C., Duller, R.A. & allen, P. Grain-size trends reveal the late orogenic tectonic and erosional history of the south–central Pyrenees, Spain 111

FaithFull, J.W., tiMMerMann, M.J., uPton, B.G.J. & ruMsey, M.S. Mid-Eocene renewal of magmatism in NW Scotland: the Loch Roag Dyke, Outer Hebrides 115

BarhaM, M., Murray, J., JoachiMski, M.M. & WilliaMs, D.M. The onset of the Permo-Carboniferous glaciation: reconciling global stratigraphic evidence with biogenic apatite δ18O records in the late Visean 119

rotevatn, A. & Fossen, H. Soft faults with hard tips: magnitude-order displacement gradient variations controlled by strain softening versus hardening; implications for fault scaling 123

Research Articles

schoFielD, N.J., BroWn, D.J., Magee, C. & stevenson, C.T. Sill morphology and comparison of brittle and non-brittle emplacement mechanisms 127

Witt, C.A., rangin, C., anDreani, L., olaez, N. & Martinez, J. The transpressive left-lateral Sierra Madre de Chiapas and its buried front in the Tabasco Plain (southern Mexico) 143

eMeleus, C.H., troll, V.R., cheW, D.M. & MeaDe, F.C. Lateral versus vertical emplacement in shallow-level intrusions? The Slieve Gullion ring-complex revisited 157

Morris, J.L., Wright, V.P. & eDWarDs, D. Siluro-Devonian landscapes of southern Britain: the stability and nature of early vascular plant habitats 173

suan, G., FöllMi, K.B., aDatte, T., BoMou, B. sPangenBerg, J.E. & van De schootBrugge, B., Major environmental change and bonebed genesis prior to the Triassic–Jurassic mass extinction 191

Mason, A.J. Major early thrusting as a control on the Palaeoproterozoic evolution of the Lewisian Complex: evidence from the Outer Hebrides, NW Scotland 201

McDougall, I., BroWn, F.H., vasconcelos, P.M., cohen, B.E., thieDe, D.S. & Buchanan, M.J. New single crystal 40Ar/39Ar ages improve time scale for deposition of the Omo Group, Omo-Turkana Basin, East Africa 213

herMann, E., hochuli, P.A., Bucher, H., BrühWiler, T., hautMann, M., Ware, D., Weissert, H., roohi, G., yaseen, a. & rehMan, K. Climatic oscillations at the onset of the Mesozoic inferred from palynological records from the North Indian Margin 227

Volume 169, Part 2, March 2012

Geological Society Internet site: www.geolsoc.org.uk

JGS online submission: http://jgs.allentrack.net

Abstracted and/or indexed in Current Contents, Science Citation Index, GeoArchive, GeoRef, Geobase, Petroleum Abstracts, Geological Abstracts and Mineralogical Abstracts.

Published by the Geological Society of London

Cover image: Recumbent folds generated during sediment slumping around the Dead Sea Basin.

Photo: Ian Alsop

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