MAST200 Lecture Notes - Lecture 5: Carbonate Compensation Depth, Terrigenous Sediment, Pelagic Sediment

• School: University of Delaware
• Department: Marine Studies
• Course: MAST200
• Professor: Thoroughgood Carolyn

Document Summary

Marine sedimentation - unconsolidated organic and inorganic particles that accumulate on the ocean floor. Chemical processes within the oceanic crust and seawater. Transported to ocean, deposit by settling through water column; most erosion of rock occurs on land and most deposition of sediment occurs in the ocean. Paleoceanography: study of how ocean, atmosphere, and land interactions have produced changes in ocean chemistry, circulation, biology, and climate over time. Marine sediment provides clues to past changes. Sampling the seafloor: hard rock can be sampled with a durable bottom dredge with a wire bag and metal collar; surface sediments are collected by grab samplers that take a. Core sampling: a heavy weight drives the core barrel into the sediment; there is also. Classification by grain size - ranging from boulders (>256 mm), cobbles, gravel, sand, offshore drilling silt, clay (0. 0002-0. 0039 mm) Continental origin; from weathering of rocks above sea level. Rivers, wind, glaciers, turbidites, sea level change.