OUTLINE. Introduction Sediment Transport and Deposition From Sediment to Sedimentary Rock Types of Sedimentary Rocks Sedimentary Facies Reading the Story in Sedimentary Rocks Resources in Sediments and Sedimentary Rocks Geo-Recap. OBJECTIVES.
1 Weathering yields sediment that is transported by various geologic agents and deposited as an aggregate of loose solids.
2 Compaction and cementation convert sediment to sedimentary rock.
3 Texture and composition are used to classify sedimentary rocks.
4 Individual layers of sediment differ in texture, composition, or both, depending on the nature of the processes accounting for their deposition.
5 Many extensive sedimentary rock layers were deposited when shallow seas covered large parts of the continents or during withdrawals of seas from the continents.
6 A variety of features known as sedimentary structures form in sediment at the time of deposition.
7 Most fossil evidence of prehistoric life is found in sedimentary rocks.
8 Geologists study sedimentary structures and fossils to determine the geologic history of sedimentary rocks.
9 Some sediments and sedimentary rocks are resources in themselves or contain resources such as petroleum and natural gas.