This postcard is an aerial picture of one of Alaska’s larger glaciers, but it is unidentified in the picture itself.
Arctic Circle Enterprises, Anchorage Alaska, Photo by Frank H. Whaley.
The description on the back is very brief and not particularly informative:
A river of ageless ice forms one of Alaska’s scenic wonders. Wien Air Alaska
–This card was mailed and is postmarked 22 August 1980, so the photo likely dates from shortly before that time.