GEO 303 Lecture Notes - Lecture 26: Little Ice Age, Axial Tilt, Crater Counting
22 Dec 2017
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Document Summary
Mountain glaciers: all sizes, all over the place. Ice caps, ice sheets: can cover continents, up to several km thick, comprise of ~99% of ice on earth. Rock glaciers & debris-covered glaciers: how to make ice. Freezing liquid water (sea ice & permafrost) Compaction of snow sedimentary ice (glaciers, ice sheets, permafrost) Melt-water: sea-level contribution, source of freshwater, a source of life: ice. Red pigments help to absorb more heat: blood falls, antarctica algae) Flush of slaty iron oxide (rusty) water w/ exotic microbes from under the glacier (no. Related to the search of extraterrestrial life. On mars: look for the water, look at the glaciers. Tell us something about climate & climate history. Glaciers reshape the landscape, leaving behind distinctive forms, even when they have. Valley glaciers erode a large quantity of bedrock & sediment. They convert v-shaped stream valleys unto u-shaped glacial valleys. Often wildly different from local geology, where they were dropped.
