New data bearing on the stratigraphy and age of the Glen Canyon Group, (Triassic and Jurassic) in southern Utah and northern Arizona.
Reference:
Peterson,F. et al. (1977)
New data bearing on the stratigraphy and age of the Glen Canyon Group, (Triassic and Jurassic) in southern Utah and northern Arizona. Geological Society of America, Abstracts with Program, Annual Meeting
Vol. 9 # 6 P. 755- 755