Sökning: "Triassic"

Visar resultat 1 - 5 av 13 avhandlingar innehållade ordet Triassic.

  1. 1. The emergence of pelagic calcification and its influence on seawater chemistry in the Upper Triassic

    Författare :Isaline Demangel; Berggrundsgeologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Calcareous nannofossils; Triassic; Neo-Tethys Ocean; Pelagic calcification;

    Sammanfattning : After the early biomineralisation event in the early Paleozoic (Cambrian –Ordovician; 541 – 443.8 Ma), the Late Triassic (237 – 201.3 Ma) represents another key period of biomineralisation with the onset of the Mesozoic plankton radiation. LÄS MER

  3. 2. Who ate whom? Paleoecology revealed through synchrotron microtomography of coprolites (fossil feces)

    Författare :Martin Qvarnström; Živilė Žigaitė; Grzegorz Niedźwiedzki; Per Ahlberg; Karen Chin; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; coprolites; paleoecology; synchrotron microtomography; taphonomy; Triassic; Biologi; Biology;

    Sammanfattning : Fossil droppings, known as coprolites, are being increasingly recognized as a valuable source of paleoecological information with special regard to diets, parasitism, and physiology of extinct taxa. Here, it is suggested that the excellent preservation and amount of inclusions in the coprolites (e.g. LÄS MER

  4. 3. Marine oolites as proxies for palaeoenvironmental reconstructions during extinction events

    Författare :Ingrid Urban; Berggrundsgeologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ooids; Permian-Triassic boundary; Triassic-Jurassic Boundary; Arabian Platform; Southern Alps; palaeoenvironmental reconstruction;

    Sammanfattning : At present time, it has been stated that “Human activities, principally through emissions of greenhouse gases, have unequivocally caused global warming, with global surface temperature reaching 1.1°C above 1850–1900 in 2011–2020”. LÄS MER

  5. 4. Rhaeto-liassic floras and their bearing on the stratigraphy of triassic rocks

    Författare :Britta Lundblad; Stockholms högskola; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  7. 5. An integrated study of geological, magnetic and electromagnetic data for mineral exploration in the Jameson Land Basin, central East Greenland

    Författare :Anaïs Brethes; Thorkild Maack Rasmussen; Florian Wellmann; Luleå tekniska universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; central East Greenland; Jameson Land Basin; base metal mineralization; geological structures; magnetic data; electromagnetic data; Prospekteringsgeofysik; Exploration Geophysics;

    Sammanfattning : The Jameson Land Basin, located in central East Greenland, initiated in Devonian time with the collapse of the over-thickened Caledonian Orogen. The basin developed during different phases of rifting from the late Paleozoic to the Mesozoic and has accumulated between 16-18 km of sediments. LÄS MER