lake bonneville and estimates of upper mantle viscosity
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Lake Bonneville and Estimates of Upper Mantle Viscosity
Kevin Kwong & Glynis Jehle
Keith Vaught, “Ancient Shoreline” via Flickr, August 28, 2011 , < http://www.flickr.com/photos/hiker56/444876892/>
Water
Image from GEOCACHING
Passey 1981
Shoreline Measurements Reflecting Isostatic Rebound
Crittenden 1963
Elevations of Bonneville and Provo Shorelines
North and South Profile West and East Profile
Passey 1981 Passey 1981
Calculating Viscosity is the viscosity of the substratum in poises
f represents the dimensions of the load
ρ = 3.4 g cm/3, the density of the substratum
g is the acceleration caused by gravity on earth, 9.8 m/s2
k = 1/Tr , time 0f rebound is 4000 yrs
Solving for viscosity gave a value of 0.96 x 1021 poises, or 1021 poises
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