GEOL 1001 Chapter : Chapter 6 - Sedimentary Rocks
Document Summary
These rocks are where we nd fossil fuels, drinking water, some ore. People in construction projects need to be concerned about sedimentary rocks for roads, tunnels, houses, and buildings. Clastic sedimentary rocks - cementation of loose particles. Loose particles are clasts or grains a. b. Takes five steps to make a clastic rock: a. b. Erosion - separates debris from the source rock. Transportation - the path that the sediment moves. High velocity water can carry much bigger particles. Water has a higher velocity on a steeper slope. Air is the lowest viscosity medium for transportation. a. Moves only sand and dust, because it has a lower viscosity than water. d. Deposition - sediment settles out of a solution. Has pores or open spaces where water travels through. Pores ll with minerals precipitated from the groundwater. Grain size / texture - coarse to ne. Clast composition - rock fragments or minerals (secondary description)
