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Refer to the chart and identify each rock-forming mineral in Fig. A4.4.1 by writing its name below the photograph.

Refer to the chart and identify each rock-forming mineral in Fig. A4.4.1 by writing its name below the photograph.

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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 Refer to the chart and identify each rock-forming mineral in Fig. A4.4.1 by writing its name below the photograph.

1 4 7 10 13 90° 90° 2 5 8 14 11 -124% 56° 3 6 12 90° 15
Transcribed Image Text:1 4 7 10 13 90° 90° 2 5 8 14 11 -124% 56° 3 6 12 90° 15
Mineral augite (pyroxene) biotite (mica) calcite chlorite dolomite garnet gypsum halite hornblende (amphibole) kaolinite muscovite (mica) olivine plagioclase (feldspar) orthoclase (feldspar) quartz SOME COMMON ROCK-FORMING MINERALS Common in Igneous Rocks Description Very dark green to brown or dark gray, hard mineral (hardness 5.5-6.0) with two cleavages about 90 degees apart. Glossy black mineral that easily splits into thin transparent sheets along its excellent cleavage. Hardness 2.5-3.0. Usually colorless, yellow, white, or amber. Breaks along three excellent cleavages (none at 90 degrees) to form rhombohedrons (leaning blocks). Hardness 3. Reacts with dilute hydrochloric acid (HCI). Green mica-like mineral that splits into thin glossy transparent sheets along its excellent cleavage. Hardness 2.0-2.5. Occurs in large crystals or fine-grained masses. Pink, white, gray, yellow, brown, colorless. Perfect rhombohedral cleavage. Effervesces weakly in HCI if powdered. Curved, saddle-like crystals. Red to black rounded crystals with no cleavage. Very hard (hardness 7). Colorless, white, or gray mineral. Easily scratched (hardness 2.0), even with a fingernail." Colorless, white, yellow, gray cubes that break into cubic shapes because they have three excellent cleavages 90 degrees apart. Brittle. Hardness 2.5. Dark gray to black, hard mineral (hardness 5.5-6.0). Breaks along glossy cleavage surfaces about 56 and 124 degrees apart. Earthy white, gray, or very light brown clayey masses that leave powder on your fingers. Very fine grained. No visible crystals. Hardness 1-2. Colorless, brown, yellow, or white minerals that easily split into transparent thin sheets along its excellent cleavage. Hardness 2.0-2.5. Pale to dark olive green or yellow mineral with no cleavage. Very hard (hardness 7). Crystals may resemble sand grains. Brittle. Usually white to pastel gray but may be colorless or black with iridescent play of colors. Exhibits fracture surfaces and two good cleavages. Cleavage surfaces may have thin striations. Hardness 6. Usually pink-orange or pale brown, may be white. Usually has internal discontinuous streaks (exsolu- tion lamellae). Exhibits fracture surfaces and two good cleavages. Hardness 6. Usually transparent to translucent gray or milky white, may be colorless. No cleavage. Breaks along uneven fractures or curved conchoidal fractures (like glass). Very hard (hardness 7). Common in Sedimentary Rocks ✓ Common in Metamorphic Rocks
Transcribed Image Text:Mineral augite (pyroxene) biotite (mica) calcite chlorite dolomite garnet gypsum halite hornblende (amphibole) kaolinite muscovite (mica) olivine plagioclase (feldspar) orthoclase (feldspar) quartz SOME COMMON ROCK-FORMING MINERALS Common in Igneous Rocks Description Very dark green to brown or dark gray, hard mineral (hardness 5.5-6.0) with two cleavages about 90 degees apart. Glossy black mineral that easily splits into thin transparent sheets along its excellent cleavage. Hardness 2.5-3.0. Usually colorless, yellow, white, or amber. Breaks along three excellent cleavages (none at 90 degrees) to form rhombohedrons (leaning blocks). Hardness 3. Reacts with dilute hydrochloric acid (HCI). Green mica-like mineral that splits into thin glossy transparent sheets along its excellent cleavage. Hardness 2.0-2.5. Occurs in large crystals or fine-grained masses. Pink, white, gray, yellow, brown, colorless. Perfect rhombohedral cleavage. Effervesces weakly in HCI if powdered. Curved, saddle-like crystals. Red to black rounded crystals with no cleavage. Very hard (hardness 7). Colorless, white, or gray mineral. Easily scratched (hardness 2.0), even with a fingernail." Colorless, white, yellow, gray cubes that break into cubic shapes because they have three excellent cleavages 90 degrees apart. Brittle. Hardness 2.5. Dark gray to black, hard mineral (hardness 5.5-6.0). Breaks along glossy cleavage surfaces about 56 and 124 degrees apart. Earthy white, gray, or very light brown clayey masses that leave powder on your fingers. Very fine grained. No visible crystals. Hardness 1-2. Colorless, brown, yellow, or white minerals that easily split into transparent thin sheets along its excellent cleavage. Hardness 2.0-2.5. Pale to dark olive green or yellow mineral with no cleavage. Very hard (hardness 7). Crystals may resemble sand grains. Brittle. Usually white to pastel gray but may be colorless or black with iridescent play of colors. Exhibits fracture surfaces and two good cleavages. Cleavage surfaces may have thin striations. Hardness 6. Usually pink-orange or pale brown, may be white. Usually has internal discontinuous streaks (exsolu- tion lamellae). Exhibits fracture surfaces and two good cleavages. Hardness 6. Usually transparent to translucent gray or milky white, may be colorless. No cleavage. Breaks along uneven fractures or curved conchoidal fractures (like glass). Very hard (hardness 7). Common in Sedimentary Rocks ✓ Common in Metamorphic Rocks
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