Mathematics – Logic
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..359f&link_type=abstract
Lunar and Planetary Science, volume 27, page 359
Mathematics
Logic
1
Domes: Lava, Domes: Pancake, Models: Laboratory, Models: Thermal, Rheology: Lava
Scientific paper
The venusian "pancakes" brought silicic lava domes to the attention of many planetary geoscientists. Lava domes have also been compared with certain constructs on the Moon, Mars and icy satellites. The principal unresolved questions about domes are how their overall shape (morphology) and surface structure (texture) relate to their composition and mode of emplacement. Because few terrestrial domes have been carefully monitored while active, various attempts have been made to model their growth in the laboratory and in theory. Here we present the results of 21 new analog experiments using suspensions of polyethylene glycol (PEG) wax and kaolin (clay) powder injected into tanks of cold water. The resulting extrusions exhibit a progression of morphologic and textural features common to natural domes, with transitions depending on the relative rates of eruption and cooling. The identification of similar features on extra-terrestrial flows may expand our ability to infer their composition and cooling history.
Fink Herman J.
Griffiths Ross W.
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