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Geology and mineral deposits of the Jabal ash Shumta quadrangle, Kingdom of Saudi Arabia
C. L. Hummel, Abdullah O. Ankary
1972, Open-File Report 72-177
Rocks, structures, and mineral deposits which are the result of both the older Halaban petro-tectonic cycle and the younker Najd Wrench Fault deformation are present in the Ash Shumta area. Northward-trending belts of granitic rocks and folded, layered metavolcanic and metasedimentary rocks of the Halaban Formation which they intrude represent...
Recent activity of glaciers of Mount Rainier, Washington
Robert S. Sigafoos, E. L. Hendricks
1972, Professional Paper 387-B
Knowing the ages of trees growing on recent moraines at Mount Rainier, Wash., permits the moraines to be dated. Moraines which are ridges of boulders, gravel, sand, and dust deposited at the margins of a glacier, mark former limits of a receding glacier. Knowing past glacial activity aids our understanding...