Essays about: "trace fossils"
Showing result 1 - 5 of 7 essays containing the words trace fossils.
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1. The Origins and Ecology of Early Paleozoic Spreiten Ichnofossils: Comparisons of Daedalus and Syringomorpha with Alectorurus
University essay from Uppsala universitet/Institutionen för geovetenskaperAbstract : The Cambrian explosion not only shaped the ecosystems of the Phanerozoic, but fundamentally changed how biota interacts with the environment, including the substrate. Cambrian trace fossils Alectorurus and Syringomorpha as well as Ordovician-Silurian Daedalus represent novel modes of faunal interaction with the newly innovated shallow marine mixed-ground and have surprisingly limited stratigraphic ranges. READ MORE
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2. Palaeoenvironments of the Earliest (Middle Devonian) Tetrapod Trackways from the Holy Cross Mountains, Poland; Locomotion in a Terrestrial Setting?
University essay from Uppsala universitet/Institutionen för geovetenskaperAbstract : The palaeoenvironment from which early tetrapods emerged is crucial to comprehend in order to understand the mechanisms that drove and allowed the terrestrialization of vertebrates; one of the most important evolutionary ‘events’ in the history of animals. Nevertheless, much of the terrestrialization is shrouded in obscurity, inter alia, due to scarcity of early tetrapods in the fossil record. READ MORE
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3. Determination of dioxins in Cretaceous strata from the South of Sweden. : Can the environmental anthropogenic pollutant dioxin be of natural origin ?
University essay from Örebro universitet/Institutionen för naturvetenskap och teknikAbstract : Eleven sediment samples from different geological layers and four fossils from the South of Sweden were collected and estimated to be 80 million years old (approximately late of Cretaceous period). The samples were analyzed for polychlorinated dibenzo-p dioxins (PCDD/Fs) to investigate whether these samples are likely to contain dioxins from a natural formation. READ MORE
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4. Trace fossils from the Permian of western Dronning Maud Land, Antarctica
University essay from Lunds universitet/Geologiska institutionenAbstract : Non-marine trace fossils from the Permian of Antarctica are systematically described and possible depositional environments are discussed. The studied material derives from sedimentary sequences consisting mainly of sandstone and shale at Vestfjella and Kirwanveggen, western Dronning Maud Land. READ MORE
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5. Sedimentary structures and facies of fine grained deep water carbonate turbidites in a Paleocene-Middle Eocene flysch complex, Monte Sporno, northern Apennines, Italy
University essay from Lunds universitet/Geologiska institutionenAbstract : The Monte Sporno flysch unit consists of regularly alternating calcareous turbidites and subordinate hemipelagic clays, deposited in a basin plain environment near, but above, the calcite compensation depth (CCD). Evidence for turbidity current emplacement includes sole markings, Bouma intervals and resedimented shallow-water microfossil species in a deep-water trace fossil assemblage (Nereites ichnofacies). READ MORE
