Mathematics – Logic
Scientific paper
Aug 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000mpse.conf...77h&link_type=abstract
International Conference on Mars Polar Science and Exploration, p. 77
Mathematics
Logic
Basalt, Glaciers, Ice, Morphology, Geology, Glass, Magma, Viscosity
Scientific paper
In this presentation we report results from analysis of pillow basalt formations in Kverkfjoell, NE-Iceland. Pillow basalt formations are commonly found in Iceland. These formations record to eruption under glacial conditions, with most examples being related to the last glaciation. These formations are well preserved and pristine glass can be found on the pillow rims in all cases. The sharp division of pillows and hyaloclastites that is observed in many subglacial volcanic formations is thought to reflect pressure conditions surrounding the vent at time of the eruption. Morphological studies of pillows, viscosity calculation and analog experiments suggest that pillows' size spectrum is primarily controlled by eruption rate and viscosity. Existence of extensive lava flows on the sea floor has, on the other hand, been explained by very high eruption rate. Vesicular glassy rims observed on pillow margin a result from quenching of the magma when it comes in contact with water. Confining pressure influences degassing of the magma and degassing is further limited by the actual amount of volatiles in the magma prior to eruption. At low pressures the most abundant volatile in magma is H2O. Glass from quenched pillow rims can thus be useful to determine the pressure under which the magma was extruded. Additional information is contained in the original extended abstract.
Carroll Michael R.
Höskuldsson A.
Sparks Stephen J. R.
No associations
LandOfFree
Quaternary Ice Sheet Thickness, Joekulhlaups and Rapid Depressurization of Pillow Basalts does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Quaternary Ice Sheet Thickness, Joekulhlaups and Rapid Depressurization of Pillow Basalts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quaternary Ice Sheet Thickness, Joekulhlaups and Rapid Depressurization of Pillow Basalts will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-741803