It is from an 1965 University of Oregon Article by G.T. Benson of the Geology Department. http://www.oregongeology.org/pubs/OG/OBv27n02.pdf
This is a panoramic photo.
very nice shot! greetings from Spain
very nice colours
belle le felci
Best regards Theo
Very good photo. Portland must be a very good city to life.
Thank you primo.masotti@alice.... for your visit and kind vote. Belated I know, but much appreciated nevertheless. Glad I could share this Oregon falls with you. Best, alicia
A very nice shot!