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Unformatted text preview: sink to the seafloor. Under special circumstances some sedimentary rocks can form by precipitation of dissolved chemicals from the seawater. For example gypsum and rocksalt. Time, high pressure (when sediments are buried deep in the earth's crust), and high temperature will cause loose sediments to lithify into rocks. This is the result of compaction and several chemical processes in the sediment. When sediments are buried deep in the earth's crust, or exposed to high temperatures, new types of rocks can be formed as a result. Fossils usually do not survive this process. The rocks that are formed are described in the table below: Original: Rock: Slightly metamorphic rock: Metamorphic rock:--> Higher temperature and pressure--> clay Shale Phylite / Schist Metamorphic rocks like gneiss sand Sandstone Quartzite chalk Limestone Marble...
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- Spring '10