Lithosphere-Asthenosphere boundary a thermal control of oceanic-lithosphere thickness. The continental lithosphere contains an ancient, stable part known as the craton. The LAB is particularly difficult to study in these regions and evidence suggests that the lithosphere within this old part of the continent is at it thickest and even appears to exhibit large variations in thickness beneath the cratons, thus supporting the theory that lithosphere thickness and LAB depth are age-dependent. Depths of the LAB beneath these regions (also known as shields and platforms) are estimated to be between 200 and 250 km deep. Beneath Phanerozoic continental crust, the LAB is roughly
Booker T. & the M.G.'s to give each other three months to finish up all of their individual projects. They would then devote three years to what would be renamed "Booker T. Jones & the Memphis Group". Nine days later (October 1), Al Jackson, the man Cropper would remember as "the greatest drummer to ever walk the earth", was murdered in his home. The remaining three members and drummer Willie Hall (a session musician who had played on many Stax hits, such as Isaac Hayes's "Theme from "Shaft"") regrouped under their old name, Booker T. & the M.G.'s, and recorded the album "Universal Language" for