GEOLOGY LAB: Online Igneous Rock Identification

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This lab has been designed to introduce you to common igneous rocks found on or near Earth’s surface. High-quality photographs will substitute for actual rock samples traditionally utilized to compl ... ete this assignment. Please review the associated mineral and igneous rock lecture and lab background information along with these questions, and if necessary, consult online resources for additional photographs and information. Igneous rock properties and identification: For each rock name and image, please provide information for the: a) texture (aphanitic or phaneritic), b) color, c) are mineral grains or crystals visible, and if so, what minerals?, d) does the rock have any unique features (solid glass, glass fibers, vesicles or air holes, etc.), and e) did the rock form on the Earth’s surface of below ground (extrusive or intrusive). [Show More]

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