Showing papers by "Malcolm B. Hart published in 2011"
TL;DR: In this article, the authors present evidence suggesting that this process occurs naturally where explosive volcanism deposits ash directly into ocean surface waters, and demonstrate that the acids bound to ash surfaces from the 2003 volcanic dome collapse event of the Soufriere Hills volcano could have caused the upper 5 m of the water column to become undersaturated with respect to aragonite.
30 citations
01 Jan 2011
8 citations
TL;DR: This paper showed that the Bunkers Hill borehole contains a carbon isotope excursion (CIE) in the Upnor Formation followed by a positive recovery from another CIE within the overlying Reading Formation.
Abstract: This study demonstrates that the Bunkers Hill borehole, which is located within the Hampshire Basin, contains a carbon isotope excursion (CIE) in the Upnor Formation followed by a positive recovery from another CIE within the overlying Reading Formation. This study has also shown that the CIE in the Upnor Formation predates the Paleocene/Eocene Thermal Maximum (PETM), while the carbon isotope recovery at the base of the Reading Formation is most likely related to it. The positive carbon isotope trend, before a return to more negative values, seen throughout the majority of the Reading Formation can also be seen in coeval deposits in the Jubilee 404T borehole in the London Basin and in the Tienen Formation in the Doel and Kallo boreholes from the Belgium Basin. This indicates that this post-PETM carbon isotope signal may, therefore, be regional if not global in nature.
7 citations
TL;DR: Wendler et al. as mentioned in this paper investigated the Fiskeler Member (Fish Clay), a streaked marl interval with a smectite rich, red oxidised layer at its base marking the boundary.
3 citations
01 Jun 2011
TL;DR: In this paper, a newly discovered diatom flora from the Bracklesham Group (Eocene) sediments exposed in Whitecliff Bay (Isle of Wight, UK) is extended and the palaeogeographical implications discussed.
Abstract: The description of a newly discovered diatom flora from the Bracklesham Group (Eocene) sediments exposed in Whitecliff Bay (Isle of Wight, UK) is extended and the palaeogeographical implications discussed. The diatom assemblage, which includes Aulacodiscus singiliewskyanus , A. subexcavatus , Brightwellia hyperborea , Coscinodiscus morsianus , Fenestrella antiqua , Stellarima microtrias , Stephanopyxis turris , ?Thalassiosiropsis wittiana , Trinacria regina and Triceratium spp., is described from the foreshore exposures rather than the badly weathered succession exposed in the cliffs. The flora, which is preserved as pyrite steinkerns, is both diverse and abundant. Only centric diatoms have been recorded and this indicates an open marine environment. The large foraminiferid Nummulites laevigatus is also present in these glauconitic silts and sands. The distribution of these two groups of microfossils, and the associated macrofauna, is used to propose a sequence stratigraphical interpretation for this part of the Eocene succession. The Marsh farm Formation, hitherto regarded as estuarine or non-marine, is shown to be of open marine origin by the presence of marine diatom species.
3 citations
TL;DR: In this article, the authors present a survey of the literature in this area: https://www.referred.org.au/blog/blogging-and-blogging/
Abstract: Introduction Conclusions References
3 citations