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LAVA FLOWS 143
Kilburn, C.R.J. (2000) Lava flows and flow fields. 9.12 Questions to think about
In Encyclopedia of Volcanoes (Ed. H. Sigurdsson),
pp. 291–306. Academic Press, San Diego, CA. 1 What is likely to be the difference between a lava
Lejeune, A. & Richet, P. (1995) Rheology of crystal- flow formed by direct overflow from the vent
bearing silicate melts: an experimental study at high and a rootless lava flow formed by the eruption,
viscosities. J. Geophys. Res. 100, 4215–29. at the same volume flux, of a more gas-rich batch
Pinkerton, H. & Norton, G. (1995) Rheological prop- of the same magma?
erties of basaltic lavas at sub-liquidus temperatures: 2 Two compound lava fields form on a certain vol-
laboratory and field measurements on lavas from cano. One forms by a large number of lava flow
Mount Etna. J. Volcanol. Geotherm. Res. 68, 307–23.
units being erupted side by side, whereas the
Pinkerton, H. & Wilson, L. (1994) Factors controlling
other forms by earlier flow units becoming lava
the lengths of channel-fed lava flows, Bull. Vol-
tubes and feeding later flows. If the total volume
canol. 56, 108–20.
of lava erupted in the two cases is the same,
Self, S., Thordarson, T., Keszthelyi, L., Walker, G.P.L.,
which one is likely to have the greater area?
Hon, K., Murphy, M.T., Long, P. & Finnemore, S.A.
3 Two lava flows form from the same type of
(1996) A new model for the emplacement of
magma at the same temperature erupted at the
Columbia River basalts as large, inflated pahoehoe
same rate on the same topographic slope, but
lava flow-fields. Geophys. Res. Lett. 23, 2689–92.
one is much more vesicular than the other. What
Tallarico, A. & Dragoni, M. (2000) A three-dimensional
Bingham model for channeled lava flows. J. Geo- effect is this likely to have on the morphology of
phys. Res. 105(B11), 25969–80. the flow?