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Water resources data for Michigan, water year 1971; Part 2, Water quality records
Water Resources Division, U.S. Geological Survey
1972, Water Data Report MI-71-2
Water resources data for the 1971 water year for Michigan include records of data for the chemical and physical characteristics of surface and ground waters. Data on the quality of surface water (chemical, temperature, and sediment) were collected from designated sampling sites at predetermined intervals such as once-daily, weekly, monthly...
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...
Geology and mineral deposits of the Wadi an Nuqumi quadrangle, Kingdom of Saudi Arabia
C. L. Hummel
1972, Open-File Report 72-176
The rocks, structures, and mineral deposits of the Wadi an Nuqumi quadrangle were formed during three periods of deformation, two of Precambrian age and one of Tertiary and Recent age. The older Precambrian Halaban cycle produced the thick eugeosynclinal suite of interlayered metasedimentary and metavolcanic rocks comprising the Halaban Formation,...