ANSC 2060 Chapter : Ch 7 Rodents Ferrets And Lagomorphs Part 1
Document Summary
Chapter 6 pages of earth"s past: sedimentary rocks. Sedimentary rocks: rocks forming at or near the surface of the earth by cementing loose grains together: grains produced from. Shells and shell fragments: growth of masses of shell-producing organisms, occur only in the upper portion of the crust (cap igneous and metamorphic rocks) Sedimentary record : record information about ancient events and environments, thinner where igneous and metamorphic rocks outcrop, thicker in sedimentary basis. Sediments are the building blocks of sedimentary rocks. Classes of sedimentary rocks: clastic: made from weathered fragments. Solid grains stuck together to form a solid mass. Transportation: dispersal by wind, water, ice: weathering: generation of detritus (eroded matter) via rock disintegration, deposition: settling out of the transporting fluid. Clast (grain) size: the average diameter of the clasts: boulder, cobble, pebbly, sand, silt, clay, with increasing transport, average grain size decreases. Clast composition: the mineral makeup of sediments: cues about.
