Essays about: "volcanic eruption"

Showing result 11 - 15 of 20 essays containing the words volcanic eruption.

  1. 11. The late Holoce 14C reservoir age in the Chukchi Sea as inferred from tephra in marine sediments

    University essay from Stockholms universitet/Institutionen för geologiska vetenskaper

    Author : Aron Varhelyi; [2016]
    Keywords : Tephra; Aniakchak; Holocene; Chukchi Sea;

    Abstract : Volcanic ash, or tephra, blankets the local and regional landscape following a volcanic eruption. If this ash layer is preserved and identified, it can act as a time synchronous marker bed (isochron) for correlation between marine, terrestrial, glacial and lacustrine deposits. READ MORE

  3. 12. Magmatic Sheet Intrusions as Seen in Surface Deformation - Developing a Tool for Interpreting Volcanic Unrest

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Frank Guldstrand; [2015]
    Keywords : Analogue modelling; surface deformation; cone sheets; dykes; moiré; photogrammetry; sheet intrusions; propagation; Analog modellering; ytdeformation; inverterade koner; vertikala plan; moiré; fotogrammetri; magmatiska intrusioner; propagering;

    Abstract : The end-member types of shallow magmatic intrusions comprise cone sheets and dykes. These propagate from their source magma chamber towards the Earth’s surface. The propagation of magma within the shallow part of the volcano plumbing system produces surface deformation and seismicity, signs of volcanic unrest. READ MORE

  4. 13. Transportation and deposition of volcanic ash from Iceland to the Arctic

    University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Förbränningsfysik

    Author : Josefin Jönsson; [2014]
    Keywords : Grímsvötn 2011; volcanic eruption; the Arctic; transportation and deposition of volcanic ash; albedo; air traffic; Physics and Astronomy; Earth and Environmental Sciences;

    Abstract : As the Arctic will become more available to shipping traffic in the future, given the current trend of diminishing ice sheets continues, the emission of particles and gases originating from ships will increase in the Arctic. The emission of particles and gases can affect the sensitive Arctic environment in many ways, e.g. READ MORE

  5. 14. Characterising the magma supply system of Agung and Batur volcanoes on Bali, Indonesia

    University essay from Uppsala universitet/Berggrundsgeologi

    Author : Harri Geiger; [2014]
    Keywords : Bali; Batur; Agung; thermobarometry; clinopyroxene; plagioclase;

    Abstract : Volcanic and magmatic processes are controlled by the composition of the magmas involved and the nature and structure of their underlying plumbing systems. To understand and predict volcanic behaviour, it is of critical importance to characterize the associated magmatic plumbing and supply system. READ MORE

  6. 15. Recent Icelandic Tephra in a Swedish Peat Deposit

    University essay from Institutionen för naturgeografi och kvartärgeologi (INK)

    Author : Eric Skoglund; [2012]
    Keywords : tephra; ash; eyjafjallajökull; peat deposit; ash spread; ash cloud; aska; tephra; torv; askmoln; eyjafjallajökull;

    Abstract : Two eruptions from Icelandic volcanoes have in the last years caused widespread dispersalof volcanic ash in the atmosphere. The transportation of tephra from Iceland to mainlandEurope is not an uncommon event and it can cause large disruptions to society. READ MORE