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- W744228609 abstract "More than 27 mineral species have been identified in Cenozoic sediments of varying lithology within the Safford Valley of Arizona. The mineral assemblages suggest the following possible sources for the basin-filling detritus: (1) acid igneous rocks, (2) basic igneous rocks, (3) high-rank metamorphic rocks, (4) reworked sediments, and (5) ex plosive volcanic activity. The high angularity and low stability of most of the heavy min erals suggests that the crystalline rocks of the mountains that flank the valley were the source of most of the detritus. The presence of glass and fresh euhedral volcanic minerals suggests that explosive volcanic activity has also contributed greatly to the detritus that fills the valley. The use of heavy minerals as a means of differentiation and correlation of strata must be based upon frequency of occurrence of mineral species, rather than on any major mineralogical changes." @default.
- W744228609 created "2016-06-24" @default.
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- W744228609 date "1959-01-01" @default.
- W744228609 modified "2023-09-23" @default.
- W744228609 title "Detrital mineral studies of some Cenozoic sediments, Safford Valley, Arizona" @default.
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