ENVS 2160 Lecture Notes - Lecture 18: Diamicton, Silt, Refraction
22 Jun 2016
School
Department
Course
Professor
Document Summary
Glaciolacustrine and glaciomarine environments are those affected by lacustrine (lake) and marine processes modified by glacial ice and meltwater flows. Lakes are common in periphery of large ice sheets: abundant meltwater, over deepened basins. Glaciers trap a low of water inland, reducing the volume of water in ocean basins sea level falls: isostatic depressions under weight of ice. 1)floating terminus (e. g. ice shelves, fringing ice shelves, floating ice tongues) Where the glacier mostly remains in contact with the bottom. Tidewater glaciers most common in embayments and fjords. Usually formed by temperate and sometimes polar glaciers: grounding line where the glacier starts floating. Located far inland from the terminus in ice shelves and is at or near the terminus in tide- water glaciers. Respond to glaciation by quasi-synchronous changes in water level and isotopic composition. Different biotic composition ogranisms affect sedimentation and provide sediment particles therefore, marine sediments differ from lake sediments. Generated by winds therefore not effective under ice cover.
