Essays about: "ordovicium"

Showing result 1 - 5 of 23 essays containing the word ordovicium.

  1. 1. Estimating the Early Evolution of Brachiopods Using an Integrated Approach Combining Genomics and Fossils

    University essay from Uppsala universitet/Paleobiologi

    Author : Chloé Robert; [2019]
    Keywords : Brachiopoda; evolutionary history; phylogeny; Maximum likelihood; Bayesian inference; fossil calibrations; Brachiopoda; evolutionhistoria; fylogeni; Maximum likelihood-metoden; Bayesiansk statistik; fossilkalibering;

    Abstract : The Brachiopoda, a major group of the Lophotrochozoa, experienced a rapid early evolutionary diversification during the well-known Cambrian explosion and subsequently dominated the Palaeozoic benthos with its diversity and abundance. Even though the phylogeny of the Lophotrochozoa is still hotly debated, it is now known that the Brachiopoda are a monophyletic grouping. READ MORE

  2. 2. Stratigraphy and pyrite geochemistry of the Lower–Upper Ordovician in the Lerhamn and Fågelsång-3 drill cores, Scania, Sweden

    University essay from Lunds universitet/Geologiska institutionen

    Author : Fisnik Balija; [2018]
    Keywords : Ordovician; shale; drill cores; arsenic; pyrite; heavy metals; Lerhamn; Fågelsång; Scania; Sweden.; Earth and Environmental Sciences;

    Abstract : Arsenik är ett mycket giftigt ämne som finns i berg, mark och grundvatten, och är känt för att orsaka allvarliga hälsoeffekter. Neurologiska skador hos människan inträffar vid koncentrationer så låga som 100 μg/L, medan 1–3 mg/kg kroppsvikt As är en dödlig dos. READ MORE

  3. 3. 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. 4. The Metamorphic History ofthe Helags Mountain Area,Scandinavian Caledonides

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Sara Johansson; [2016]
    Keywords : Seve Nappe Complex; Scandinavian Caledonides; metamorphism; monazite geochronology; garnet;

    Abstract : The Scandinavian Caledonides formed as a result of collision between the continents Baltica and Laurentia, in Silurian and Early Devonian time. The evolution of the orogen has been a topic of research since before the turn of the last century. READ MORE

  5. 5. Lower to Middle Ordovician carbonate sedimentology and stratigraphy of the Pakri peninsula, north-western Estonia

    University essay from Lunds universitet/Geologiska institutionen

    Author : Niklas Brådenmark; [2016]
    Keywords : berggrundsgeologi; ordovicium; baltoskandiska grundhavet; havsnivå; kalksten; glaukonit hårdbottnar.; Earth and Environmental Sciences;

    Abstract : Sedimentologi och stratigrafi från senaste tidiga ordovicium till och med mellanordovicium i nordvästra Estland har undersökts. Studien omfattar klippsektioner och Testepere stenbrott på Pakrihalvön, samt en vägskärning utanför staden Tabasalu strax väster om Tallinn. READ MORE