A joint is defined as a fracture in a rock between the sides of which there is no observable relative movement. They are present is most consolidated rocks of igneous‚ metamorphic and sedimentary origin. Joints may form as a result of either diastrophism or contraction. Description: (i) A series of parallel joints is called a ’joint set’. (ii) Two or more joint sets intersecting each other produce a ’joint system’. (iii) Two sets of joints nearly at right angles to one another‚ produced by the
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Metamorphic rocks are the transformation of the existing rocks‚ the protolith through the process of metamorphism. The Protoliths can be the igneous rock‚ sedimentary rock or any old metamorphic rock. Due to severe heat and pressure‚ the protolithis get various chemical or physical changes. These rocks create a huge part of the Earth’s crust and these can be classified by the mineral and chemical assemblage and by the textures. Examples of the metamorphic rocks are: slate‚ gneiss‚ schist‚ marble
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and was mainly a bench warmer. 3. He cooled and hardened‚ improved on his skills and became known as Igneous Iggy. B. Igneous Iggy 1. Igneous Iggy was a shortstop playing for the Seattle Sedimentaries.. 2. He was a 10 year pro and hit 46 Rbi’s‚ and 15 Homeruns during his last season. 3. Over this time‚ Igneous Iggy experienced weathering and erosion‚ and compaction and cementation. 4. He also dramatically improved
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There are three main rock types present in Ireland: Igneous‚ sedimentary and metamorphic. Igneous rocks are rocks which have crystallized from molten rock. Sedimentary rocks are rocks which have formed due to the gradual accumulation of sediment. Metamorphic rocks are rocks which have once existed as igneous or sedimentary rocks but changed due to great heat or pressure. Over the course of my essay‚ I will account for five rocks found in Ireland and there probable rock forming conditions. Granite
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crystalline. A crystalline has flat faces and smooth surfaces. Igneous rocks are formed from magma. If they are intrusive (plutonic)‚ they have large crystals and cooled slowly. If they are extrusive‚ they cool quickly‚ have fined grain. The scheme for igneous rock identification is based on texture‚ color‚ composition‚ and density. Sedimentary rocks are the 2nd step in the rock cycle. They are composed of bits and pieces of rock that have been watered by rain‚ water‚ and other things. They
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Sedimentary Rocks Define 2 types of weathering? • Mechanical: breaking rocks into smaller chunks o Sediment: clasts (particles or sediment) • Chemical: dissolve mierals or change rock chemistry and make new minerals o Sediment: Ions in solution Which type would result in a conglomerate? • Mechanical. What are the compositions and depositional environments of Coal and Halite? • Coal: o Comp.: plant material o Dep. Environ.: Swamp • Halite: o Comp: NaCl o Dep. Environ.: desert‚
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Amethyst Research Paper I went to the local flea market today and found a rock for sale. I decided to purchase the rock and bring it home to do a little research on it. After surfing the internet I discovered my find to be a mineral rock named‚ “amethyst.” I was interested in finding out where and how this mineral was formed. The more I searched‚ the more I encountered fascinating information. This is a small summary of what I learned. The physical characteristics of amethyst consist of
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Describe the Rock Cycle. Be sure to include the different rock types and processes that occur within the cycle. Consider a hypothetical granite (igneous rock) and describe three possible pathways through the cycle. The rock cycle is a model which is telling people that the changes of the rocks that take place on the earth. The changes show how each type of rock is formed. These all changes make their own type of rock base on the weathering‚ heat or pressure‚ etc.…all the rock made of minerals
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Sedimentary rocks in Pakistan range in age from Precambrian to Miocene i.e from oldest to youngest on the geological time scale form 542 million years to latest. Luckily for geoscientists all of them are exposed in different parts of the country. Lithologically they constitute sandstone‚ limestone‚ shale and mixed lithologies of them all. These rocks are exposed all along the mountain ranges from Islamabad in north to Karachi in the south. Igneous rocks are exposed north of Peshawar or only at
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As all the students flooded into the classroom and started to unpack‚ the teacher‚ Mrs.Bentley‚ said‚ "Today you are going on a mini field trip to a park with Mrs.Crystal‚ who studies rocks and minerals! What you’re about to learn is a surprise!" The students cheered‚ wondering why they were going there. They gladly followed Mrs.Crystal out of the room and to the park nearby. Mrs. Crystal asked‚ "Do you know what inside a volcano?" Many hands shot up. She pointed to a girl. "Magma‚ and when it spews
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