Learning GOAL This activity gives you opportunities to visually estimate the percentage of mafic minerals in an igneous

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Learning GOAL This activity gives you opportunities to visually estimate the percentage of mafic minerals in an igneous

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Learning Goal This Activity Gives You Opportunities To Visually Estimate The Percentage Of Mafic Minerals In An Igneous 1
Learning Goal This Activity Gives You Opportunities To Visually Estimate The Percentage Of Mafic Minerals In An Igneous 1 (70.04 KiB) Viewed 34 times
Learning GOAL This activity gives you opportunities to visually estimate the percentage of mafic minerals in an igneous rock. Being able to estimate the percentage of mafic minerals allows you to classify an unknown igneous rock as felsic. intermediate, mafic or ultramafic, and so helps you to identify the rock type. 10% Figure A5.5.1 A mafic %:_ rock description: light 35% medium D 65% mafic :. rock description: dark 90% entirely dark The mafic minerals in photo A are shown as black areas in map B. Use Fig. A5.5.1. to estimate the percentage of mafic min- erals in this rock. mafic : Based on your estimate, describe this rock as felsic, intermediate, mafic, or ultramafic. Refer to Fig. 5.15. E 100% Now do the same analysis for the three rocks shown below. mafic : rock description:
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