GEOL 1001 Chapter : Chapter 6 Outline
Document Summary
Chapter 6: pages of earth"s past: sedimentary rocks . It has a sugary texture and a pervasive porosity. Cherts (comprised of cryptocrystalline quartz) can be formed by both biochemical (silica- secreting plankton) and replacement (calcite crystals replaced with silica) processes: true, evaporites are a type of _______ sedimentary rock. If more than one rock type must specify formation: geology maps display the distribution of formations and are named based their geographic location where they were found, water flowing over loose sediment creates bedforms. Bedforms are linked to flow velocity and sediment size: ripple marks, cross beds, dunes, bedforms, ripples, cm- scale ridges and troughs, types. Indicate flow (direction and strength: asymmetric ripples unidirectional flow, symmetric ripples- wave oscillation, dunes, similar to ripples but much larger. Includes: mud cracks, polygonal desiccation features in wet mud. Indicate alternating wet and dry conditions: scour marks, troughs eroded in soft mud by current flow, fossils, evidence of past life, sedimentary structures review, sed.
