GEOG 2051 : Exam 4 Notes
Document Summary
Why is the velocity necessary to move a sand grain higher for wind than for water: air is less dense (and less viscous) than water. Which images show the correct wind direction for these ripples: a, (yardangs would be b) Which image shows correct wind direction: a, barchan dunes. Photo from utah shows thick layers of cross-bedded sands, what depositional feature created these sand layers: dunes, because they"re huge. What dune is shown in the picture: parabolic, next to a coastline, wind is left to right. Where aeolian came from: aeolus greek god of wind, aeolian (or eolian, processes of erosion, transportation, and deposition by wind and the resulting landforms, wind is moving air that is generated by pressure differences in atmosphere. Aeolian transport: silts and clays move in suspension (occasionally very fine sand, most sand moves by saltation, coarse sand moves along the ground by surface creep (traction, resulting of wind drag.
