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  • The AA. calculate episodic incision rates of the Colorado River based on absolute ages of 2 levels of Quaternary deposits adjacent to Glen Canyon, along the north flank of Navajo Mountain. Minimum surface ages are determined by a combination
  • of cosmogenic radionuclide surface exposure ages, uranium series and soil-development formation times. The AA. also determine incision rates of 2 tributaries to the Colorado River : Oak Creek and Bridge Creek.
  • Erosion patterns associated with glaciation of trunk and hanging valley systems in northern Sweden were investigated using cosmogenic nuclide Be 10 apparent exposure ages and inferred nuclide inheritance. Although quantifying the amount of erosion