Showing papers by "Malcolm B. Hart published in 1993"
TL;DR: The Cenomanian-Turonian boundary event has been fully documented from a series of localities between Flamborough Head in Humberside and Marham in Norfolk as mentioned in this paper.
42 citations
TL;DR: The UK mid-Upper Cretaceous succession is now sampled at better than a 1 m spacing from many localities providing over 2000 samples for detailed analysis and development of high resolution stratigraphy as discussed by the authors.
Abstract: Abstract Bioevents range in importance from the first/last appearance of a single taxon, through zonal boundaries of local/regional/international significance, major non-sequences, to (at the highest level) global bioevents. The UK mid-Upper Cretaceous succession is now sampled at better than a 1 m spacing from many localities providing over 2000 samples for detailed analysis and development of high resolution stratigraphy. Examples of detailed correlation are provided for the Albian/Cenomanian boundary, the mid-Cenomanian and the uppermost Cenomanian, while consideration of the complete faunal succession provides information necessary for the monitoring of global environmental change in the Cretaceous.
12 citations
01 Jan 1993
TL;DR: In this article, it is shown that many of the problems associated with engineering works and the extraction of industrial minerals can be solved using standard or somewhat innovative, micropalaeontological techniques.
Abstract: Many of the geological problems associated with engineering works and the extraction of industrial minerals can be solved using standard, or somewhat innovative, micropalaeontological techniques. This is especially true in cases where the micropalaeontological input is needed to provide precise stratigraphical control within a particular geological setting.
2 citations
01 Jan 1993
TL;DR: In this article, the post-and syn-depositional diagenetic events in the chert-bearing beds of the Portland Limestone Formation were investigated using the JSM6100 scanning electron microscope with LINK dispersive X-ray analytical capability.
Abstract: Preliminary findings are described of the post- and syn-depositional diagenetic events in the chert-bearing beds of the Portland Limestone Formation. Central to this investigation is the JSM6100 scanning electron microscope with LINK dispersive X-ray analytical capability. Chertification was not homogeneous and a distinct silica banding and zonation can be seen in chert nodules and beds. Previous authors have attributed the silica source to the abundant sponge spicules within the rock. These spicules are now found to be calcitic. If earlier assumptions are true, therefore, the initial spicules must have undergone solution of silica and subsequent replacement by secondary calcite
2 citations