Transcription of Rocks & Minerals
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Rocks & MineralsIntroductionAtoms & ElementsMineralsIgneous RocksSedimentary RocksMetamorphic RocksThe Rock CycleGeology of Mineral ResourcesSummaryThis curious world we inhabit is more wonderful than convenient; morebeautiful than it is useful; it is more to be admired and enjoyed than David ThoreauMy words are tied in one, with the great mountains, with the great Rocks ,with the great trees, in one with my body, and my Indian Prayer2 Introduction Understanding the composition of Rocks on other planetsprovides clues to the geologic development of thoseplanets. Rocks analyzed during NASA's Pathfinder expedition toMars were found to be similar to common Rocks on NASA s Pathfinder spacecraft landed on Mars on July4, 1997, it released a "rover," a small vehicle called Sojourner(Fig.)
Each rock group is further subdivided into subgroups that are defined by the mode of origin of the rocks. Igneous rocks form when magma, molten rock, rises upward toward the surface and are classified into two types on the basis of texture (grain size) and composition. Metamorphic rocks form when changes in the composition and/or texture of a rock
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