Earth Sciences 1022A/B Lecture Notes - Lecture 17: Esker, Kame, Transparency And Translucency
19 Oct 2016
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20% of course mark; 2hrs in lab room. 2/3 on labs 4-6 but not as hard. For minerals: know moms hardness, cleavage, diaphaneity, commercial use. Lab tutorials this week, plus help hours. Know the rst page of lab 5! Ice sheets: continental scale, radial ow from a central area (diagram in notes) Valley: in mountains, ow down valleys by gravity. Upper brittle zone of fracture rides passively on lower deforming plastic zone that may also slide over the glacier"s bed (diagram in notes) Accumulation > ablation, terminus advances (diagram in notes) Abrasion: rock debris in glacier"s sole grind, scrape, scour rock: results in striations, grooves on rock. Cirques: rock bowls at heads of valley glaciers. Ar tes, horns: sharp mountain ridges and peaks. Till: stony mud with striated and polished stones: main material in moraines and drumlins that form along the edge of or under the glacier (diagram in notes) Minimum contrast in seasons in mid-high latitudes.
