Essays about: "microfossil"

Showing result 1 - 5 of 6 essays containing the word microfossil.

  1. 1. The Eemian Baltic Sea hydrography and paleoenvironment based on foraminiferal geochemistry

    University essay from Lunds universitet/Geologiska institutionen

    Author : Julia Chonewicz; [2020]
    Keywords : trace elements; benthic foraminifera; last interglacial; temperature reconstruction; geochemistry; Earth and Environmental Sciences;

    Abstract : I den här masteruppsatsen undersöktes geokemin i kalkskalen av bottenlevande foraminiferer från Anholt (Kattegat), Ristinge (Bälthavet) och Obrzynowo (Egentliga Östersjön), för att rekonstruera de hydrografiska förhållanden i Östersjön och paleomiljön under den senaste interglacialen (130 - 115 ka BP). De variabler som analyserades innefattade Mg/Ca, Ba/Ca och Mn/Ca samt stabila syre- och kolisotoper (δ18O och δ13C) i kombination med data från tidigare studier och modern hydrografi. READ MORE

  3. 2. Biodiversity of Organic-Walled Eukaryotic Microfossils from the Tonian Visingsö Group, Sweden

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Corentin Loron; [2016]
    Keywords : Organic-walled microfossils; Tonian; cyst; green algae; eukaryote; Visingsö Group; Mikrofossil med organiska cellväggar; tonian; cysta; grönalger; eukaryot; Visingsö gruppen;

    Abstract : The diversification of unicellular, auto- and heterotrophic protists and the appearance of multicellular microorganisms is recorded in numerous Tonian age successions worldwide, including the Visingsö Group in southern Sweden. The Tonian Period (1000-720 Ma) was a time of changes in the marine environments with increasing oxygenation and a high input of mineral nutrients from the weathering continental margins to shallow shelves, where marine life thrived. READ MORE

  4. 3. Early life and its implications for astrobiology : a case study from Bitter Springs Chert, Australia

    University essay from Lunds universitet/Geologiska institutionen

    Author : Hanna Sigeman; [2013]
    Keywords : FTIR; XRF; SEM; microfossil; stromatolites; Amadeus Basin; Bitter Springs; origin of life; microorganisms; exobiology; early life; astrobiology; tidigt liv; astrobiologi; exobiologi; mikroorganismer; livets ursprung; stromatoliter; mikrofossil; Earth and Environmental Sciences;

    Abstract : Early life research faces additional challenges than those of the study of later life forms. Due to the de-materialization of the earliest rocks, valuable information about the early Earth is forever lost. Furthermore, early life was small and morphologically basic, effectuating abiotic pseudofossils to infiltrate the fossil record. READ MORE

  5. 4. Microspherules from the lowermost Ordovician in Scania, Sweden : affinity and taphonomy

    University essay from Lunds universitet/Geologiska institutionen

    Author : Jan Ulmius; [2010]
    Keywords : Ordovician; microfossil; embryo; pyrite; apatite; pyritisation; phosphatisation; carbonisation; Alum Shale Formation; Sweden; Ordovicium; mikrofossil; pyrit; apatit; pyritisering; fosfatbildning; kolbildning; alunskiffer; Sverige; Earth and Environmental Sciences;

    Abstract : Microscopic spherules, 0.1-0.5 mm in diameter, from the lowermost Ordovician Rhabdinopora flabelliforme parabola graptolite Zone of the Alum Shale Formation in Södra Sandby, Scania, southern Sweden, have been investigated. READ MORE

  6. 5. A paleoecological study of the Pleistocene-Holocene transition in the Kap Farvel area, South Greenland

    University essay from Lunds universitet/Geologiska institutionen

    Author : Karl Ljung; [2001]
    Keywords : lake sediments; South Greenland; Kap Farvel; Younger Dryas; Preboreal; pollen; plant succession; climate change; Earth and Environmental Sciences;

    Abstract : Populärvetenskaplig sammanfattning: En paleoekologisk studie av övergången från sen- till postglacial tid i Kap Farvel-området, Sydgrönland. En sedimentsekvens från en sjö på Grönlands sydspets, Kap Farvel-området, undersöktes med avseende på polleninnehåll, magnetisk susceptibilitet och organisk halt. READ MORE