How ar the Three Kinds of Rocks FormedThere argon troika different kinds of rocks : sedimentary , metamorphic and igneous rocks . Each of these atomic number 18 formed in a different waySedimentary rocks atomic number 18 bits and pieces of eroded earth that argon swept away into the bottoms of the different bodies of water like the sea lake and oceans . When these bits of earth settle under the water , they form layers . The arranging of weights of the layers on top tend to press down the ones at the bottom and make it more compact . In opinion , these will become solid aqueous rocks . Examples of sedimentary rocks are sandstones limestones , shale , conglomerate and gypsum rocksMetamorphic rocks were originally either igneous or sedimentary rocks that have been formed into this type because of heavy pressure when they are pushed underneath the other rocks . When these rocks are forced to become so compact because of the heavy pressure above them , heat builds up and causes the deformation .
Examples of metamorphic rocks are schist and gneissGranite rocks come from volcanic trunk that transform into rocks because of slow cooling . This ice- unheated change in temperature happens when lava suddenly flows on the ground and traps cooling pockets of magma underneath . The cold temperature cools the lava slowly and forms the granite rocks . Examples of granite rocks are scoria , pumice which are very(prenominal) sluttish and may float on water and obsidian . These three ty! pes of granite are also considered to be glassReference Rock Hounds (1999 . The Franklin Institute . Retrieved June 5 , 2007 from httpwww .fi .edu /fellows /fellow1 /oct98 /index2 .htmlKind of Rocks paginate 1...If you want to get a full essay, assure it on our website:
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