Lab 2 Igneous Rock Identification Instructions 1. Study 68 Geology Lab 2 flashcards from Devin O. on StudyBlue. Have a near equal amount of felsic and mafic qualities. 2.1 Bonding and Lattices; 2.2 Mineral Groups; 2.3 Mineral Properties; 2.4 Economic Minerals; Lab 2 Exercises; Summary; Lab 3: Silicate Minerals. characterized by fine-grained textures because their rapid cooling at or near the surface did not provide enough time for large crystals to grow. can be recognized by the presence of “ooids” which are small spherical grains of calcite. This preview shows page 1 - 2 out of 2 pages. Examine the samples of rocks provided by your instructor. Also, make sure that your answers have the appropriate units! large crystal sizes, i.e., their visual appearance shows individual crystals interlocked together to form the rock mass. Igneous Minerals You are responsible for identification of quartz, potassium feldspar, plagioclase feldspar, mica (light or dark), amphibole, and olivine. 90º N latitude is directly in the center of the map, and the lines of latitude, measured in 2-degree increments, spread out in circles from the center. To view the polar map, imagine that you are above the North Pole looking down on it. rock gypsum, chert, oolitic limestone dolostone, soft, can be scratched easily with fingernail, made of microcrystalline quartz, therefore it is very smooth, has conchoidal fracture and is harder than glass. Geology Lab 2 - Geology 102 with Hallett at University of Wisconsin - Oshkosh - StudyBlue Flashcards Get step-by-step explanations, verified by experts. GEOL-100 Physical Geology Fall 2020 Lab 2: Introduction to Topographic Maps: Answer Sheet Note: Please type your name and answers in blue and attach the topographic profile as a separate file in whatever format is convenient (e.g., photo, scan, etc.). 3Topographic 3Topographic Maps Karen Tefend and Bradley Deline.docx, Exercise 1 (Maps and Coordinate Systems).docx, Northwest Missouri State University • GEOLOGY 27-115, Lorelei Sexton GEOL-1041 Lab 1 The Scientific Method Spring 2020.docx, East Tennessee State University • GEOLOGY 1040. View Lab Report - Geology lab 2 from CVL 423 at Ryerson University. 1. extremely smooth, created when lava cools rapidly, like obsidian, pinkish red clastic well sand angular no feldspar, can be recognized by the presence of “ooids” which are small spherical grains of calcite, SEDIMENTARY visible grains, clasitic, well to moderately sorted, surrounded, fine to medium size sand, felsic; olivial fan, I-B IGNEOUS mafic with large grains; intrusive, Granodiorite: light colored felsic rock Diorite: Less silica, darker than granite or granodiorite Dacite: Volcanic equivalent of granodiorite Andesite: volcanic equivalent of diorite, extrusive. made of the mineral dolomite (CaMg(CO3)2), which is similar to calcite, but will react to acid only when powdered. For a limited time, find answers and explanations to over 1.2 million textbook exercises for FREE! _____ rocks are formed when magma cools, which allows _____ crystals to form and become locked together to form the rock, plutonic (intrusive) and volcanic (extrusive), rocks formed when magma cools within the earth, well below the surface, rocks formed at or close to earth's surface, often a result of a volcanic eruption, provide information about volcanic eruptions, provide data regarding temperatures and magma types found below earth's surface, are used as construction materials, and produce commercial goods. how do you identify an igneous rock (two properties of the rock)? Historical Geology with Lab Lab 2: Earth, Minerals, and Igneous Rocks 2 | Page Part II. Geology; Geology 111; Susan Harris; Lab 2; Shayna R. • 14 cards. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Introducing Textbook Solutions. Are light colored, have low silica content, and contain quartz, feldspar, and orthoclase. Start studying Geology Lab 2: Igneous Rocks. This rock should be softer than glass (unlike chert). Some of our samples in lab may scratch glass due to quartz impurities, but you can identify this rock by the fact that it reacts to acid when you powder it. The cooling of magma deep in the Earth is typically much slower than the cooling process at the surface, so larger crystals can grow. © 2003-2020 Chegg Inc. All rights reserved. can be recognized by the presence of whole and/or broken fossils. Lab 2 Answer Sheet.docx - GEOL-100 Physical Geology Fall 2020 Lab 2 Introduction to Topographic Maps Answer Sheet Note Please type your name and answers. the size, shape, and arrangements of the particles that comprise a rock (useful for determining what category of igneous rock a specimen belongs to because plutonic rocks have different _____s than volcanic rocks), plutonic rock texture that has very coarse and large grain size, most crystals= >1 cm in diameter (some specimens have crystals several feet across), plutonic rock texture that has coarse and small grain size, crystal size= <1 cm in diameter, crystals are easy to see/large enough to see without magnification, rocks that contain some large grains (called phenocrysts) set into a matrix of much smaller grains, resemble a chocolate chip cookie, can form in both plutonic and volcanic settings, aphanitic, glassy, vesicular, and pyroclastic, volcanic texture that has small grain size (< 1 cm in diameter), can't see the individual crystals without magnification, volcanic texture that has no discernible grains even when using a hand lens, this texture can form when lava cools down extremely fast and forms volcanic glass, volcanic texture that is perforated with small openings (result of gas bubbles escaping from the lava as it finished cooling down), has a honeycombed appearance which causes the rock to feel unusually lightweight, volcanic texture that is comprised of solid, fragmentary material that was ejected from a volcano during an eruption; they lack the interlocked, crystalline appearance of most other igneous textures, the minerals that are present in an igneous rock (ex: granite has a ______ that includes quartz, orthoclase, and biotite), it is determined by identifying the major minerals present in the specimen (difficult because the minerals can be quite small) or by determining its color, a measurement of the percent of dark-colored minerals within the rock (possible because many minerals that are similar in color form under similar conditions), a composition of igneous rocks that has a high silica content, light in color (white, off-white, pink, and red), form at relatively low temperatures, associated with magma and lava present within continental crust, ex: quartz, orhtoclase, muscovite, and some types of plagioclase), a composition of igneous rocks that has a moderate silica content, grayish in color, roughly even mixture of only white and black minerals, form at high temperatures, ex: plagioclase, a composition of igneous rocks that has low silica content, typically dark in color (black, brown, and dark gray), form at higher temperatures, are associated with many volcanoes that are found on oceanic crust (such as the Hawaiian Islands), ex: hornblende and augite, a composition of igneous rocks that has low silica content, range from black to greenish-yellow color, form at very high temperatures, ex: olivine. 3.1 Silicate Mineral Groups; Lab 3 Exercises; Summary; Lab 4: Igneous Rocks. For each of them, with the help of the charts and the table enclosed in this lab manual, fill the blanks in the following table with the answers to all of the applicable questions. 2. Extrusive: Andesite, Iron and magnesium rich dark colored has dark minerals, mixture of coarse and fine because of 2 stage cooling process; initial slow cooling, Largest crystal size, giant mineral crystals, course grains. 859 feet, 179 feet difference in elevation, 877 feet at the top, 197 feet difference in elevation. You will use the polar map given (Figure 2.8) to plot the changing locations of the magnetic pole over time. make sure that your answers have the appropriate units! Lab 1 Exercises; Summary; Lab 2: Mineral Properties and Non-Silicate Minerals. as a separate file in whatever format is convenient (e.g., photo, scan, etc.). Intrusive: Diorite. Igneous rock with gas pockets from rapid cooling of lava or magma. Course Hero is not sponsored or endorsed by any college or university. 1) The principle of original horizontality states that layers of sediment deposit along a horizontal plane due to the effects of

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