Field lab part one

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Field lab part one

  1. 1. Edward BurdenGEOLOGY-1-CO1FIELD/LAB ASSIGNMENT PART #1<br /> The picture above is what I believe to be Shale, a type of sedimentary rock. I located this rock in a river at Pine Flat. Sedimentary rock is formed by sedimentation of material at the surface of the Earth. Sedimentation is when minerals or organic particles settle and accumulate. Sedimentary rock makes up about five percent of the Earth’s crust. This particular rock is very rough to the touch and darkly colored. It also looks like it was made up of many different things. <br /> The above two pictures are what I believe to be examples of metamorphic rocks. Metamorphic rocks are the third greatest class of rocks. Metamorphic rocks occur when sedimentary and igneous rocks change underground. The rocks are “metamorphosed” by the combination of pressure, heat, fluids and strain. These two rocks are from the Bass Lake region of California. They are both lightly colored and course to the touch. One of the rocks even appears to be somewhat porous.<br /> <br /> The above two pictures are of what I believe to be igneous rocks. Approximately ninety five percent of the Earth’s upper crust is comprised of igneous rock. This particular rock is from Yosemite National Park. The rocks are darkly colored and smooth to the touch. Igneous rocks are classified according to their texture, mineralogy, occurrence, chemical composition and shape.<br />

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