79 research outputs found
Shallow core drilling of the Upper Cretaceous Chalk at Stevns Klint, Denmark
The Upper Cretaceous â Danian succession in Denmark and most of NW Europe is composed mainly of chalk and associated shallower water carbonates deposited in a wide epeiric sea during an overall global sea-level highstand (e.g. Surlyk 1997). The MaastrichtianâDanian chalk has been intensely studied over the last 20 years, since it forms the most important reservoir rock for hydrocarbons in the North Sea Central Graben (e.g. Surlyk et al. 2003; Klinkby et al. 2005). In Denmark, thousands of water wells have been drilled through the succession as about 35% of the water consumption is from Maastrichtian chalk and Danian bryozoan limestone. During 2005 the new Cretaceous Research Centre (CRC) was established jointly at Geocenter Copenhagen by the Geological Institute, University of Copenhagen and the Geological Survey of Denmark and Greenland (GEUS) with financial support from the Danish Natural Science Research Council (FNU). CRC aims at studying the Earth System in a Greenhouse World, with special emphasis on the Upper Cretaceous â Danian chalk of NW Europe. The stable, long lasting marine macro-environment represented by the chalk sea provides a unique opportunity to analyse and link the depositional, geochemical and biological responses to external forcing at time scales ranging from the sub-Milankovitch to the million year range. The studies will be based on a wide range of methods, including seismic stratigraphy, palaeoecology, sequence-, cyclo- and biostratigraphy, isotope geochemistry, sedimentology and time series analysis. This paper presents the first preliminary results of a CRC drilling campaign at Stevns Klint, eastern Denmark (Fig. 1), where two shallow boreholes were drilled and logged from near the base of the Danian bryozoan limestone and down through the upper 350â450 m of the very thick Upper Cretaceous chalk section (VejbĂŚk et al. 2003). The cores represent the first complete sections through the Maastrichtian chalk of eastern Denmark
Deep saltwater in Chalk of North-West Europe: origin, interface characteristics and development over geological time
Seismic geomorphology and origin of diagenetic geobodies in the Upper Cretaceous Chalk of the North Sea Basin (Danish Central Graben)
Cretaceous-Tertiary pre-drift sediments of the Kangerlussuaq region, southern East Greenland
Ammonoid stratigraphy and sedimentary evolution across the PermianâTriassic boundary in Jameson Land and Traill Ă, East Greenland
Characterization and zonation of a marly chalk reservoir:the Lower Cretaceous Valdemar Field of the Danish Central Graben
The effects of physical therapists' guidance on improvement in a strength-training program for the frail elderly
Elderly participants experiencing difficulty in chair rising and with a maximum knee-extensor torque below 87.5 N ¡ m were randomized to different versions of a strength-training program for the knee-extensors: to a high-guidance group (HG; two group sessions supervised by a physical therapist and one unsupervised home session per week, n = 17), a medium-guidance group (MG; one supervised group session and two unsupervised home sessions per week, n = 16), or a control group (C; no exercise, n = 16). Maximal isometric knee strength increased more in HG than in C (p = .03) and with increasing guidance (p = .03). The effect was mainly the result of participants with low initial strength. Walking speed increased more for HG than for C (p = .02) and than for MG (p = .06). No statistically significant improvements were seen on other functional tests. In summary, the study shows a trend toward better results with more supervision, but more and larger studies are needed to confirm this
Segmentation of the eastern North Greenland oblique-shear margin - regional plate tectonic implications
Geological characterisation of the Kraka Field chalk reservoir, Danish North Sea:integration of seismic and log data
Stratigraphy of the Rotliegend Group in the Danish part of the Northern Permian Basin, North Sea
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