GEOG 2RC3 Midterm: Geo 2RC3 – Midterm 1.docx

• School: McMaster University
• Department: Geography
• Course: GEOG 2RC3
• Professor: Walter Peace

Document Summary

E. g. most of gorges in escarpment were eroded by glacial meltwater at the end of the last ice age: karst landscapes landforms created through the solution of limestone by water, e. g. , eramosa karst, characteristic landforms caves, sinkholes, underground streams, meromictic lake a lake with a very small surface area relative to its depth, e. g. crawford lake (north of burlington); formed 15,000 ya by solution of limestone by glacial meltwater; depth = 30 m; area = 3. 3 ha. Three cycles of the earth"s orbit: eccentricity, earth"s orbit around the sun changes from more elliptical to less elliptical (more oval, affects the timing of the seasons, cycle lasts 100,000+ years, tilt: the earth rotates on a titled axis; the angle of tilt varies slightly above/below. 23 degrees cycle lasts approx 41,000 years: precession, the shape of the earth"s rotation on its axis varies from more circular to more elliptical (ie. the axis of rotation wobbles , cycle approximately 19 24,000 years.