I am grateful to many friends and colleagues not only for help on the
present report, but also for help on the two preceding reports which
made this one possible. I refer to my Professional Paper 451,[43] which
supplied the detailed geologic data and to the first popular-style
booklet.[44] First of all, I must acknowledge the great help rendered by
members of my family—my eldest son Bill for serving as my unpaid field
assistant for most of the detailed mapping of the Grand Junction area,
and my two younger sons Terry and Bob for similar services during the
last phases of the fieldwork. I am especially indebted to my wife Ruth
for material assistance in all the fieldwork, including the road logging
and the color photography for the present report.
I am grateful to several colleagues of the Geological Survey and
National Park Service for help, data, or reviews of all three reports
noted, and to members of my family for reviewing both popular-style
reports.
For reviewing the present report I am especially indebted to David V.
Harris, Emeritus Professor of Geology, Colorado State University; Harry
A. Tourtelot, Geologist, U.S. Geological Survey, for reviewing both
popular-style reports and contributing petrographic studies to the
detailed report; and to my wife, Ruth.
The comments and criticisms of all reviewers were carefully considered
and most were adopted, but in some places I have preferred to state
things in my own way, and have included topics that seemingly were of
more interest to me than to some of the reviewers. The responsibility
for the form and content of this report thus remains mine.