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Friday, December 24, 2010

Field Trip to Peru (EARTH 490 course, Spring 2010)

Stephen G. Evans, Ph.D. (Professor, Engineering Geology and GeoHazards)

Department of Earth and Environmental Sciences, University of Waterloo

Students in Peru

Figure 1. The 2010 EARTH 490 field trip group on the Amazon/Pacific continental divide near Antamina Mine, Ancash, Peru (May 5, 2010)

Friday, December 24, 2010

Marl

Paul Karrow

Department of Earth and Environmental Sciences, University of Waterloo

Marl is a soft, light-coloured (white to pale gray or) mud-like sediment, seen in shallow waters of some small lakes or ponds, or under swamp lands, where it typically is covered by black organic sediment (Figure 1).

Friday, December 24, 2010

Little Daisy Mine - Jerome

Peter Russell
Department of Earth and Environmental Sciences, University of Waterloo 
A middle-aged couple walking along the Verde River in Cottonwood, Arizona, stopped to talk to me as I was sketching. They explained that the tall phragmites grass along the river was used by the native peoples as roofing in their homes and as the stem of arrows.