Geologic study of gravels of the Agua Fria River, Phoenix, AZ

摘要

The Agua Fria drainage basin (Fig. 1) is characterized by rugged mountains with high elevations and steep stream grathents in the north, and by broad alluvial filled basins separated by elongated faultblock mountain ranges in the south. There is very little difference in the distribution of rock types among the three alluvial deposits (Table 1 ), especially when grouping Crazy Basin granitic and Crazy Basin pegmatites into a single class, and when considering all Tertiary rocks as one class (Table 1).n These two figures illustrate the contrasting weathering patterns between tuffaceous and basaltic rocks.