(b) State two characteristics of each of the following (1) igneous rock (ii) metamorphic rock. The redox state of the mineralized brines (sulfate or sulfide predominant) is important for controlling minor element associations in the two classes of sedex deposits. The unique thing about them is that the internal cavity of these rocks is lined with minerals. Because sedimentary rocks tend to be more porous than igneous or metamorphic rocks, they are more likely to contain water, oil and natural gas. Igneous rocks:-The economic importance of such rocks are they are used for tabletops and carved figures.Some are also utilised as building stones. Although, it originates from igneous rocks, and is generally most economic in metamorphic rocks. Formation of metamorphic rocks, tectonic plate movements, physical and chemical change, heat and extreme pressure. Sandstone and limestone are used for building stone. They have been called syenite and pegmatite, but their igneous character is not established. Some sedimentary rock facts are provided below. What is the economic significance of these rocks today? Sedimentary Rock. There are three main types of rocks according to how they are formed. As a sedimentary rock, breccia is a variety of conglomerate. (1 pts) 3. Sedimentary rocks form when minerals and broken rocks spread into layers. . For example, I know the rock slate is used primarily for chalks. The sandstone that contains over 90% quartz is called quartzose sandstone. Ironstone: Ancient ironstones often consist of hematite and magnetite layers inter-bedded with cherts and sandstones. sedimentary rocks. These are found in abyssal seafloor and continental margins, around ocean ridges and seamounts (but at higher concentrations than those found on land). Major Zinc deposits associated wi. What are the 2 types of sedimentary rocks and describe them. Hematite is the most important ore of iron. How do the sedimentary rocks and structural styles of the Marathon area illustrate the collision? Followings are the uses of Shale: Sedimentary rocks are important for economic considerations because they may contain: Coal Petroleum and natural gas Sources of iron, aluminum, titanium, manganese, and REEs (rare earth elements) Aggregate for construction Abrasives Turning sediment into rock o Many changes occur to sediment after it is deposited o Diagenesis= chemical, physical, and biological changes that take place after . Environmental geology. Sedimentary rocks often form porous and permeable reservoirs in sedimentary basins in which water and important minerals such as oil can be found. (c) Describe the mode of formation of sedimentary rocks. Sedimentary basins are of great economic importance as most of the world's natural gas and petroleum and all of its coal is found in sedimentary rock formations, the director noted. The system comprises of ancient sedimentary rocks (4000 m thick) superimposed on the Archaean base. Sandstone. Sedimentary rocks have great economic importance - Oil, natural gas, coal, and uranium, our major energy resources, are formed in and come from sedimentary rocks. Neolithic Age: First use of flint and chert for arrowheads, axes, and tools One medical significance of igneous rock, Pumice stone is that used in skin clearing. Economic Uses. Rocks are generally classified into igneous, sedimentary and metamorphic rocks. Mostly Unfossiliferous rocks and large area of this belt is covered by the Deccan trap. Sedimentary rocks are the most common rock type found on the planet comprising nearly 70 percent of all rocks. sedimentary rock, Rock formed at or near the Earth's surface by the accumulation and lithification of fragments of preexisting rocks or by precipitation from solution at normal surface temperatures.Sedimentary rocks can be formed only where sediments are deposited long enough to become compacted and cemented into hard beds or strata.
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