A Rockis a grouping of one or more minerals<br />Three types <br />Igneous <br />Sedimentary <br />Metamorphic<br />What is a rock?<br />
Rocks are very useful in the environment for things such as:<br />cement, gravel, building materials, countertops, tiles, and statues as well as other things like containing ground water and oils/gas<br />Helps to discover the history of the Earth’s atmosphere and life on Earth<br />Why study Rocks?<br />
Igneous rocks are formed by cooling and crystallization of magma (below the Earth’s surface) or Lava (above the Earth’s surface)<br />There are two types of Igneous rocks<br />Intrusivewhich form from magma coming up from the mantle into the crust and cooling<br />Extrusivewhich form from volcanic eruptions<br />Igneous Rocks<br />
Examples of Igneous Rocks<br />Granite is an example of an Intrusive Igneous Rock<br />It forms under the Earths surface from the cooling of magma leaking up from the mantle of Earth<br />Intrusive igneous rocks have noticeably large crystals and are usually rough to the touch unless they are polished <br />Examples: Kitchen Counters<br />The Continental Crust of the Earth is primarily made of Granite<br />
Other examples of Intrusive Igneous Rocks:<br />Gabbro Andesite Diorite <br />
Examples of Extrusive Igneous Rocks<br />Basalt is an example of an Extrusive Igneous Rock <br />The Oceanic Crust is made primarily of Basalt <br />Basalt is formed from lava on the crust of the Earth. <br />Because it is formed on the surface, the crystals are very fine-grained <br />
Sedimentary Rocks<br />Sedimentary rocks are formed by the accumulation of sediments. <br />Sediments include materials from sand grain size to boulder size <br />There are three basic types of sedimentary rocks:<br />Clastic (physical weathering)<br />Chemical <br />Organic<br />
Clastic Sedimentary Rocks<br />Clastic Sedimentary Rocksare formed from mechanical weathering debris<br />Mechanical weathering takes place when rocks are broken down without any change in the chemical nature of the rocks<br />breccia, conglomerate, sandstone and shale are some examples<br /> Breccia<br />Conglomerate<br /> Sandstone<br /> Shale<br />
Chemical Sedimentary Rocks<br />Chemical Sedimentary Rocks form when dissolved materials precipitate from solution<br />Example : Halite that forms from dried up saltwater lakes<br />rock salt (Halite) and some limestone are examples of Chemical Sed. Rocks<br /> Halite<br /> Limestone<br />
Organic Sedimentary Rocks<br />Organic Sedimentary Rocksform from the dead plants and animals and their debris.<br />Coal and fossiliferous limestone are examples of organic sed. rock <br />An example of fossiliferous limestone has sea shells in it <br />Organic material comes from anything living or has lived before<br /> Fossiliferous Limestone<br /> Coal<br />
Metamorphic Rocks<br />Metamorphic rocks have been modified by heat, pressure and chemical process<br />usually while buried deep below Earth's surface.<br />Exposure to these extreme conditions has altered the minerals, texture and chemical composition of the rocks.<br />There are two basic types of metamorphic rocks:<br /> Non-foliated <br /> Foliated<br />
Foliated Metamorphic Rocks<br />Foliated metamorphic rocks: have a layered or banded appearanceknown as a foliation <br />Examples are gneiss, phyllite, schist and slate<br />produced by exposure to heat and directed pressure<br /> Gneiss<br /> Slate<br /> Schist<br />
Non-Foliated Metamorphic Rock<br />Non-foliated metamorphic rockssuch as marble and quartzite<br />do not have a layered or banded appearance<br />Quartzite<br /> Marble<br />
All pictures came from www.gelogy.com<br />Information on definitions came from the book used in Gel 100 at Central Michigan University<br />Information from slides 9-15 came from www.gelogy.com<br />Sedimentary information came from http://geology.com/rocks/sedimentary-rocks.shtml<br />Metamorphic information came from http://geology.com/rocks/metamorphic-rocks.shtml<br /> Work Sited Page<br />
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