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Outputs (249)

Shear-derived mixing in dense granular flows (2011)
Journal Article
Rowley, P. J., Kokelaar, P., Menzies, M., & Waltham, D. (2011). Shear-derived mixing in dense granular flows. Journal of Sedimentary Research, 81(12), 874-884. https://doi.org/10.2110/jsr.2011.72

In flume experiments, granular avalanches run onto loose substrates develop 3-D architectures that record shear-derived mixing between the flow and the substrate. Spherical silica beads 0.250 mm diameter are run onto stratified substrates of various... Read More about Shear-derived mixing in dense granular flows.

Mica-controlled anisotropy within mid-to-upper crustal mylonites: an EBSD study of mica fabrics in the Alpine Fault Zone, New Zealand (2011)
Journal Article
Dempsey, E. D., Prior, D. J., Mariani, E., Toy, V. G., & Tatham, D. J. (2011). Mica-controlled anisotropy within mid-to-upper crustal mylonites: an EBSD study of mica fabrics in the Alpine Fault Zone, New Zealand. Geological Society Special Publications, 360(1), 33-47. https://doi.org/10.1144/SP360.3

The lattice preferred orientation (LPO) of both muscovite and biotite were measured by electron backscatter diffraction (EBSD) and these data, together with the LPOs of the other main constituent minerals, were used to produce models of the seismic v... Read More about Mica-controlled anisotropy within mid-to-upper crustal mylonites: an EBSD study of mica fabrics in the Alpine Fault Zone, New Zealand.

Climate model predictions for the latest Cretaceous: An evaluation using climatically sensitive sediments as proxy indicators (2011)
Journal Article
Craggs, H. J., Valdes, P. J., & Widdowson, M. (2012). Climate model predictions for the latest Cretaceous: An evaluation using climatically sensitive sediments as proxy indicators. Palaeogeography, palaeoclimatology, palaeoecology, 315-316, 12-23. https://doi.org/10.1016/j.palaeo.2011.11.004

To date, many general circulation model (GCM) experiments have failed to reproduce the warm, high latitude temperatures suggested for the Cretaceous by geological proxy climate indicators, especially for the Northern Hemisphere and within continental... Read More about Climate model predictions for the latest Cretaceous: An evaluation using climatically sensitive sediments as proxy indicators.

Near-vent processes of the 273 ka Poris eruption (Tenerife): ignimbrite sedimentation, hybrid deposition and phreatomagmatism (2011)
Presentation / Conference Contribution
Smith, N., Kokelaar, B., & Branney, M. (2011, June). Near-vent processes of the 273 ka Poris eruption (Tenerife): ignimbrite sedimentation, hybrid deposition and phreatomagmatism. Paper presented at Earth on the edge: Science for a sustainable planet. International Union of Geodesy and Geophysics, Melbourne, Australia

The proximal succession of the 273 ka Poris eruption in the Diego Hernandez wall of Las Cañadas, Tenerife, records opening, main, and waning stages of explosive activity. Stratigraphic and geochemical correlations show varying processes between prox... Read More about Near-vent processes of the 273 ka Poris eruption (Tenerife): ignimbrite sedimentation, hybrid deposition and phreatomagmatism.

Qualitative and quantitative approaches in palaeohydrography: a case study from core-top parameters in the Gulf of Cadiz (2010)
Journal Article
Rogerson, M., Schönfeld, J., & Leng, M. J. (2011). Qualitative and quantitative approaches in palaeohydrography: a case study from core-top parameters in the Gulf of Cadiz. Marine Geology, 280(1-4), 150-167. https://doi.org/10.1016/j.margeo.2010.12.008

Palaeoceanography relies on the assumption that parameters measureable in sediment cores correlate reliably to hydrographic parameters. Areas of dynamic watermass mixing, which generally have steep hydrographic gradients, therefore provide both a tem... Read More about Qualitative and quantitative approaches in palaeohydrography: a case study from core-top parameters in the Gulf of Cadiz.

Devonian rise in atmospheric oxygen correlated to the radiations of terrestrial plants and large predatory fish (2010)
Journal Article
Dahl, T. W., Hammarlund, E. U., Anbar, A. D., Bond, D. P. G., Gill, B. C., Gordon, G. W., Knoll, A. H., Nielsen, A. T., Schovsbo, N. H., & Canfield, D. E. (2010). Devonian rise in atmospheric oxygen correlated to the radiations of terrestrial plants and large predatory fish. Proceedings of the National Academy of Sciences of the United States of America, 107(42), 17911-17915. https://doi.org/10.1073/pnas.1011287107

The evolution of Earth's biota is intimately linked to the oxygenation of the oceans and atmosphere. We use the isotopic composition and concentration of molybdenum (Mo) in sedimentary rocks to explore this relationship. Our results indicate two epis... Read More about Devonian rise in atmospheric oxygen correlated to the radiations of terrestrial plants and large predatory fish.

Tectonic setting and timing of the final Deccan flood basalt eruptions (2010)
Journal Article
Hooper, P., Widdowson, M., & Kelley, S. (2010). Tectonic setting and timing of the final Deccan flood basalt eruptions. Geology, 38(9), 839-842. https://doi.org/10.1130/G31072.1

The role of extensional tectonics in the generation of basaltic melt and eruption of continental flood basalts is controversial, and yet it remains crucial to understanding the origin and cause of these large-volume eruptions. Establishing the timing... Read More about Tectonic setting and timing of the final Deccan flood basalt eruptions.

The Middle Permian (Capitanian) mass extinction on land and in the oceans (2010)
Journal Article
Bond, D. P. G., Hilton, J., Wignall, P. B., Ali, J. R., Stevens, L. G., Sun, Y., & Lai, X. (2010). The Middle Permian (Capitanian) mass extinction on land and in the oceans. Earth-Science Reviews, 102(1-2), 100-116. https://doi.org/10.1016/j.earscirev.2010.07.004

A Middle Permian mass extinction, first discovered in 1994, has become known as the "end-Guadalupian event" in the literature. However, recent studies of foraminifera- and brachiopod-range truncations in conodont-dated sections on the South China Blo... Read More about The Middle Permian (Capitanian) mass extinction on land and in the oceans.

Tectonic history and occurrence of 2.4 Ga mafic dyke swarms adjacent to Godavari Basin, Karimnagar, India (2010)
Journal Article
Mallikharjuna Rao, J., Poornachandra Rao, G. V., Widdowson, M., Yellappa, T., & Kelley, S. P. (2010). Tectonic history and occurrence of 2.4 Ga mafic dyke swarms adjacent to Godavari Basin, Karimnagar, India. Current Science, 98(11), 1472-1478

Proterozoic dyke swarms are exposed partly in granulitic terrain and partly in gneissic terrain and extend in a NE-SW direction near the Godavari Basin, Karimnagar area, Central India. The Karimnagar dyke swarm petrographically exhibits two groups su... Read More about Tectonic history and occurrence of 2.4 Ga mafic dyke swarms adjacent to Godavari Basin, Karimnagar, India.