Let me rewrite this one so that is can be searched on the Internet as well:
"The subterranean engine driving this motion is as much a mystery to us as it was to Dutton although geologists and their side-kicks, the geophysicists, have cooked up a whale of a theory lately, called plate tectonics."
Also quote worthy is another quote I found in an article I picked out for my Depositional Environments class to read.
Blakey, R.C. 1973. Stratigraphy and origin of the Moenkopi Formation (Triassic) of southeastern Utah. The Mountain Geologist. v. 10, pp.1-17