Sedimentary Rocks Essay

777 words - 3 pages

Sedimentary Rocks PAGE 4
Sedimentary RocksSedimentary RocksSedimentary rocks are rocks, which are formed when parts of deceased organisms or pieces of rocks that already exist form deposits on the surface of the Earth. Sedimentary rocks have three main classifications. The classifications are biological sedimentary rocks, chemical sedimentary rocks, and clastic sedimentary rocks. Each sedimentary rock classification has characteristics that are apparent and are found in environments, which are depositional. Plate tectonics also have an adverse affect on the formation and sedimentation of sedimentary rocks.Sedimentary rocks that are formed in a biological process are formed from the remains of living organisms, which have accumulated, have been compacted, and have been lithified (Boggs, 2006). Deposits from primitive plants form coal, and deposits of shells can either for coquina or limestone. When coal is formed from the deposits of plant material, it takes place mostly in swampland or in basins, which are closed fluvial. When limestone, a carbonate rock, is formed there are two minerals, which are dominant, these two minerals are dolomite and calcite. These types of sedimentary rocks are found in basins of deposits (Middleton, 2003).Sedimentary rocks that are formed in a chemical process are formed through chemical deposits. Chemical sedimentary rocks can include limestone, which can be biological or chemical, and gypsum and halite, which are evaporites (Boggs, 2006). Evaporites are sedimentary rocks, which are formed from the evaporation of water that has a mineral content that is high like sodium chloride. This formation can take place in an open or a closed system where the minerals are precipitated from the solution and form deposits. Halite, rock salt, can form deposits, which have been found to be at least 1,000 meters in thickness. These types of sedimentary rocks are found in basins of deposits (Middleton, 2003).Sedimentary rocks that are clastic, also known as terrigenous, are formed when pieces of already existing rock accumulate. These types of sedimentary rock are found in bedding or layers. The pieces of the already existing rock, clasts, are found to range in size from boulders to clay. These clasts are bonded together. The most used classification for classifying terrigenous sedimentary rocks are by the size of the clast. By using this classification, theses sedimentary rocks are known as sandstone, shale, or...

Find Another Essay On Sedimentary Rocks

Classifying Rocks Essay

686 words - 3 pages Classifying Rocks      Rocks are classified to make it easier on people to identify them in the future. This can be done by a numerous amount of ways. Each rock type has their own specific ways, but there are two distinct characteristics that apply to all. These are texture and composition. These two, along with many others helps to classify igneous, sedimentary, and metamorphic rocks.      Igneous rocks are classified first by texture

Crayons used to depict the Rock Cycle - Science - Lab Report

704 words - 3 pages happen. These so-called processes drive the formation, breakdown, and reformation of a rock. The three types of rocks (metamorphic, igneous, and sedimentary) are greatly intertwined in the mechanism of the cycle and that allows the changes to occur. Rocks are composed primarily of minerals. Their classifications are based on the way they formed. The rock cycle shows how these can be developed into other kinds through specific procedures. For


1714 words - 7 pages . The lakes that formed were up to 2,000 feet deep. These dams and lakes greatly affected the sediment and ecology along the beaches within the Grand Canyon. III. The Geology of The Grand Canyon The science of geology is one of history and process: the history of our planet. Geology is a mystery, a puzzle. What’s in the rocks and the ground of the Grand Canyon? For one, there is 13,000 feet of sedimentary rock. There is also a more variety

'Cliff profiles are created by many complex factors'-Discuss

550 words - 2 pages profiles of a cliff. The angle of dip of sedimentary rocks is one element of rock structure which has an important effect on cliff profiles. There are three types of strata's that affect the profile of a cliff, horizontally bedded strata, seaward-dipping strata and landward-dipping strata. Horizontally bedded sedimentary rocks are undercut by waves causing the collapse and retreat of the cliffs affecting its profile. Seaward-dipping strata have

geography case study report

682 words - 3 pages Geography essay Zoe cheung 4C 6Explain the operation of the rock cycle with reference to the geology on Hong Kong. To what extent are the rocks types responsible for the deep weathering profile found in the territory?The rock cycle is the formation, breakdown and reformation of a rock as a result of sedimentary, igneous, and metamorphic processes. The rock cycle is an illustration that is used to describe how the three rock types are related and

Gemology Terminology Research

1100 words - 5 pages categories are igneous, sedimentary and metamorphic. Each classification has its own composition, texture and structure. Igneous rocks are derived from magma, sedimentary rocks consists of different fragments of different rocks or materials that preexisted and metamorphic rocks are rocks that were once igneous or sedimentary rocks that have under gone a change which has physically changed the rock. Igneous rocks are made from the hardening of magma


827 words - 4 pages the northwestern section of the Black Hills-Bear Lodge Mountains in Wyoming, Even more amazing than the unique formation we see today, is the history behind how it was formed. Approximately 500 million years ago, thick layers of sedimentary rocks (made up of mud, sand and other sediments) were deposited in what was once a shallow sea. There are three different hypotheses concerning exactly HOW the tower itself formed. All three theories agree

The Application of Paleomagnetism

1757 words - 8 pages Paleomagnetism is defined as the study of the record of the Earth’s ancient magnetic field using igneous and sedimentary rocks. It has been instrumental for our understanding of how planet Earth operates and is one of the cornerstones of plate tectonic theory. When rocks form, they record the direction, polarity, and absolute or relative intensity of the Earth’s magnetic field, which can be extracted with paleomagnetic methods. Paleomagnetism

Proof of the Existence of Evolution

602 words - 2 pages proof of Dinosaurs once roaming the earth. Fossils are usually found in sedimentary rock. Sedimentary rock is formed by layers of silt or mud on top of each other; thus, the resulting rock contains a series of horizontal layers, or strata. As these Sedimentary rocks form, they bury organism, bones, pollen, shells. Bones, which over time will fully encase, and form a fossil. Each layer of sedimentary rock contains fossils which are typical for a

Insulation and Influences

753 words - 4 pages igneous rocks is the most direct. This kind of rock is formed merely by the cooling and solidification of magma or lava. Their rate of cooling contributes to their type of texture (fine-grained or coarse-grained). The formation process of sedimentary rocks is the most complex since it involves the most steps. Any igneous, sedimentary, or metamorphic rock can become a sedimentary rock if it goes through the following process: uplift, weathering and

Mars Exploration Rovers

795 words - 4 pages jarosite. Both minerals form in water, and chemical analysis supports the case for formation in a salty environment such as a sea or ocean. Moreover, we find very similar “blueberries” that formed in water on Earth, and a close look at the layering of the sedimentary rocks suggests a changing environment of waves and/or wind. Previous theories suggested they were created by simple chemical reactions without the help of life, but research last year

Similar Essays

Sedimentary Rocks Essay

777 words - 3 pages Sedimentary Rocks 1Sedimentary RocksAxia Collage University of PhoenixSedimentary RocksWhere do sedimentary rocks originate? How are they formed?"Sedimentary rock is one of the three main rock types (the others being igneous and metamorphic rock). Sedimentary rock is formed by deposition and consolidation of mineral and organic material and from precipitation of minerals from solution. The processes that form sedimentary rock occur at the

Sedimentary Rocks Essay

1295 words - 5 pages Sedimentary Rocks Sedimentary rocks are formed from layers of deposits laid down in lakes or seas. Over millions of years the layers of sediment build up resulting in the weight pressing downwards, creating high pressure, which squeezes the water out. As the water is squeezed out, salts form between the particles of sediment due to crystallization and this cements the particles together. Sedimentary rocks can either

Sedimentary Rock Formation Essay

735 words - 3 pages In their page, Rocks or Idaho; Harvey, Jacqueline, Vita Taube, and Diana Boyackarth states that the earth contains three types of rocks: igneous, metamorphic, and sedimentary rocks. Sedimentary rock makes up most of the rocks on the earth.The earth contains seventy five percent sedimentary rock. Seventy percent are sedimentary rocks that are on the earths surface, the other 5% is on the earths crust. Sedimentary rocks are formed in two main

Rocks Essay

1671 words - 7 pages Review of Literature I. Introduction to Sedimentary rocks Sedimentary rocks have been around for millions of years. They are what has shaped this earth and what have made it our home. Sedimentary rocks are made up of the accumulation of sediments. They are formed through a five step cycle known as the rock cycle. Through this cycle the rocks are formed and altered from being sediments to becoming sedimentary rocks. In this process the first