GLY-1104 Lecture Notes - Lecture 9: Rock Flour, Wind Wave, Frequency

• School: App State
• Department: Geology
• Course: GLY-1104
• Professor: William P.Anderson

Document Summary

Snow/ice accumulation > melting rate: cold, snowfall. Accumulation depends on slope: gentle- snow can accumulate, steep- snow slides downhill. Crevasse- fractures in the ice that form because of internal stresses in glacier as it moves: abundant at curves, abundant at changes in slope. Covered in rocks and sediment: rock flour- ground up pieces of rock. Glaciers- large masses of ice on land that show evidence of motion: valley glaciers (alpine glaciers)- narrow in mountain valleys, piedmont glaciers- spread out at foot of mountains, continental glaciers (ice sheets) Snow line- ele(cid:448)atio(cid:374) a(cid:271)o(cid:448)e (cid:449)hi(cid:272)h s(cid:374)o(cid:449) does(cid:374)"t (cid:272)o(cid:373)pletely (cid:373)elt i(cid:374) su(cid:373)(cid:373)er. Glacial ice budget: rate of glacial accumulation at the upper end of the glacier versus the rate of glacial wastage (loss) at the lower end of the glacier. When glacial accumulation is greater than glacial ablation, the result is glacial growth and associated glacial erosion. When glacial accumulation is less than glacial ablation the result is glacial loss and glacial deposition.