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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
31

A revision of the taxonomy and morphology of certain Eocene Cheloniidae

Moody, Richard Thomas Jones January 1970 (has links)
No description available.
32

A preliminary study of the post-glacial history of the Esthwaite Valley

Marler, Peter January 1952 (has links)
No description available.
33

The foraminiferal faunas of the type Kimmeridgian

Lloyd, Adrian James January 1958 (has links)
No description available.
34

The Ostracoda of the Gault of southern England

Clarke, M. W. Hughes January 1957 (has links)
No description available.
35

A study of the Aptian/Albian dinoflagellate cysts of southern England

Al-Beerkdar, A. M. R. H. January 1982 (has links)
No description available.
36

Comparative approaches to the prediction of extinction risk

Grenyer, Richard January 2003 (has links)
No description available.
37

Pholiderpeton scutigerum Huxley : an amphibian from the Yorkshire Coal measures

Agnew, J. A. January 1984 (has links)
No description available.
38

The Scottish Devonian crossopterygian fish Holoptychius

Brown, Angela Kathleen January 1978 (has links)
No description available.
39

Foraminiferal assemblage development in tropical intertidal environments : a case study from Cocoa Creek, north Queensland, Australia

Berkeley, Andrew January 2008 (has links)
This study examines the sedimentological and taphonomic controls on tropical, intertidal, foraminiferal assemblage development using a case site adjacent to Cocoa Creek, northern Queensland, Australia. The site is situated at the seaward margin of an extensive, coastal plain which has developed since a mid-Holocene sea-level highstand, and comprises several shoreparallel zones, including low-intertidal mudflat, mid- and high intertidal mangrove forest and . supra-tidal salt flat environments. Distinct mudflat and mangrove-associated facies units were identified within subsurface sediments which together indicated gradual shoreface progradation under relatively stable sea-level conditions. Calcareous species dominated living assemblages within low mangrove ~nd mudflat habitats, while upper mangrove standing crops were characterised by both agglutinated and calcareous species. The depth of infaunal populations was greatest within the upper mangrove (up to 50 cm) and shallowest within low mangrove sediments. At most stations >70% of the community was found beneath the upper 1 cm. A marked dichotomy occurred between the dead assemblages of mangrove and mudflat sediments. While mudflat dead assemblages were calcareous-dominated and occurred in high densities (up to 1,000s per cm\ dead assemblages within the mangrove were almost exclusively agglutinated, with comparatively low densities 300 per cm3 ). As well as the post-mortem loss of calcareous tests within the mangrove, a systematic seasonal decline in agglutinated dead test densities suggested this assemblage component was also highly susceptible to taphonomic loss. Detailed SEM examination of dead tests indicated that dissolution was the main taphonomic agent for calcareous tests, while organic cement loss and physical breakage caused the degradation of agglutinated tests. A conceptual model is proposed which describes foraminiferal assemblage development in terms of (1) assemblage r:naturation, and (2) burial trajectory. Seaward progradation at Cocoa Creek results in the overprinting of production and taphonomic regimes from higher-intertidal habitats onto those sediments formerly deposited within lower elevation settings. As. such, surface assemblages do not accurately reflect those assemblages which ,enter the longer-term fossil record.
40

Palaeobotany and plant taphonomy of Visean volcanic sequences from northern Britain

Brown, Racheal January 1994 (has links)
No description available.

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