The M Sc Thesis of William D. MacDonald  at the University of Calgary ,
April, 1994 entitled STABLE ISOTOPE COMPOSITION OF CAVE ICE IN WESTERN NORTH
AMERICA  has about  400 delta D and delta 18O analyses along with some major
ion data from 19 caves in nine regions of western N.A. Distances from open
ocean ranged from 50 to 1220 km, elevation ranged from 860 to 2500 m above
mean sea level, and latitude from 41 deg to 53 deg N.  ( locations in
California, Oregon, Montana, British Columbia, and Alberta)  There was
considerable variation of delta values dependent upon the location and
properties  such as ice type., air circulation, etc. The slopes of the delta
D vs delta 18O plots varied from 6.5 to 9.0 or 6.1 to 8.0  dependent upon
how the linear fit was performed. ( Linear functional analyses vs Least
squares regression) The intercepts varied from -7 to +30 per mil for LFA
and -22 to +9 per mil for LSR. Part of the thesis exercise was the
evaluation of linear fitting procedures.
I view this study as a baseline for future studies. Whereas the data in some
ways is consistent with expectations, there is much unknown about a number
of factors which can determine the isotopic compositon of cave ice.  I have
no idea of when Bill might get this work into the literature. This type of
survey is sometimes difficult to publish but I believe that it is an
important piece of work.
Roy Krouse.