About three-fourths of the surface of the continents is blanketed with a relatively thin skin of sedimentary rocks. Concentrated in sedimentary rocks are important natural resources such as crude oil, natural gas, ground water, salt, gypsum, uranium, and iron ore. Expanded Readings From Chapter 6. read more
Other Education Resources. Geology and Geological Features. Sedimentary Rocks; Sedimentary Rocks. Conglomerate. A coarse-grained sedimentary rock consisting of rounded pebbles that are surrounded by finer grained rock fragments. This conglomerate of an assortment of well-rounded clasts (note plutonic-rock clasts) outcrops near Presque Harbour, Placentia Bay. read more
The commercial importance of sedimentary rocks is visible everywhere. Coal is one of the most important resources in the world today. It is a combustible rock, and along with oil and natural gas, is a fossil fuel used to generate electricity. read more