Essays about: "silur"

Showing result 1 - 5 of 15 essays containing the word silur.

  1. 1. Enigmatic worm-like fossils from the Silurian Waukesha Lagerstätte, Wisconsin, USA

    University essay from Lunds universitet/Geologiska institutionen

    Author : Märta Westberg; [2019]
    Keywords : Waukesha Lagerstätte; Silurian; soft-tissue preservation; Palaeoscolecida; Annelida; Arthropoda Waukesha Lagerstätte; silur; mjukvävnadsbevaring; Arthropoda; Earth and Environmental Sciences;

    Abstract : The lower Silurian Waukesha Lagerstätte of Wisconsin, USA, is a Konservat-Lagerstätte which has yielded a diverse assemblage of exceptionally well-preserved soft-bodied organisms. This study comprises first-hand descriptions and assessments of 23 enigmatic worm-like specimens from the Waukesha Lagerstätte, alongside a literature review. READ MORE

  3. 2. A geophysical survey (TEM; ERT) of the Punata alluvial fan, Bolivia

    University essay from Lunds universitet/Geologiska institutionen

    Author : Joakim Mårdh; [2017]
    Keywords : electromagnetic; geophysics; TEM; Punata; alluvial fan; Earth and Environmental Sciences;

    Abstract : The Punata alluvial fan, situated in central Bolivia (Valle Alto) between the Altiplano and the lowlands, is an important aquifer for the local rural population. Due to rapid development and population growth in the area, the demand for fresh water has increased in recent year. READ MORE

  4. 3. Diversity and Evolution of Silurian Radiolarians

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Martin Tetard; [2016]
    Keywords : Radiolaria; Silurian; Canadian Arctic; Paleobiodiversity; Diversity trends; CT-Scan; Radiolaria; silur; diversitetsmönster; kanadensiska Arktis;

    Abstract : The three approaches followed herein aim to improve our understanding of the paleobiodiversity andevolution of Silurian radiolarians. The first approach provides an exhaustive taxonomic description ofan entirely new radiolarian fauna recovered from two sections of the Cape Phillips Formation in theCanadian Arctic which accumulated in two different paleoenvironmental settings. READ MORE

  5. 4. The Primitive Antiarch Yunnanolepis from China : A Microtomographic Study

    University essay from Uppsala universitet/Paleobiologi

    Author : Jessica Grahn; [2016]
    Keywords : placodermi; microtomography; 3D model; mikrotomografi; 3D-modell;

    Abstract : Placoderms appeared in the Silurian period and rapidly evolved and dominated the waters during the Devonian period. Among the earliest of the placoderms are yunnanolepids, a primitive form of antiarch from the Early Devonian of China and Vietnam. READ MORE

  6. 5. A Multi-Evidence Approach to the Affinity of Tylodus deltoides Rohon 1893

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Thomas Claybourn; [2015]
    Keywords : 3D virtual palaeohistology; evolution; Silurian; Gnathostomata; Holocephali; Ohesaare; 3D-virtuell paleohistologi; evolution; Silur; Gnathostomata; Holocephali; Ohesaare;

    Abstract : Early gnathostome evolution has recently undergone revision due to newly published phylogenies. Within this new framework, early gnathostomes in the fossil record can be revised, particularly the subject of this paper Tylodus deltoides (Rohon, 1893), vertebrate microremains from the Silurian Ohesaare Formation of Estonia. READ MORE