How do tremendous pressures and high temperatures affect limestone? Foliated metamorphic rocks are formed within the Earth's interior under extremely high pressures that are unequal, occurring when the pressure is greater in one direction than in the others (directed pressure). This is unfortunate because it obscures the role of water in the weathering processes [“reverse” of reaction (3)] that occur at atmospheric pressure and ambient surface temperature. This contrasts with the high pressure and temperature conditions required for metamorphism. The arrows represent the pressure and temperatures that cause the formation of metamorphic rocks. Pressure is uneven. Change in the rate of tectonic activity causes changes in the amount of volcanism, and volcanoes influence the climate . Many people have marble tile in their homes, but they might not realize that marble was once a different type of rock -- marble formed from the metamorphism of limestone. The term “metamorphism” comes … High temperature and moderate to low pressure is needed. The limestone turns into marble because of the tremendous pressures and high temperatures. 1. It partly depends on the rock, the high temperature, and the time duration of the exposure. How do tremendous pressures and high temperatures affect limestone? Heat source: We already know that geysers occur in areas of high geothermal activity, but where does that energy come from? What happens to the slate if these conditions increase? The Process of Changing a Rock by Extreme Heat & Pressure. Regional Metamorphism When high temperature and pressure affect large regions of the Earth's crust; causes large-scale metamorphic change, results from building of mountains, happens in low, mid, and high grade. The growth of mountain ranges affects atmospheric circulation patterns and the number of alpine glaciers. Nonfoliated = metamorphic rocks that are formed under high temperature, and LOW PRESSURE. Gneiss forms by regional metamorphism from both high temperature and pressure. In this case, the minerals separated by density and became banded. Answer the following questions on a separate sheet of paper. What are gneiss and schist? Experiments with ten groups of limestone specimens (four samples per group) under ten specific temperatures, 25 °C, 100 °C, 200 °C, 300 °C, 400 °C, 500 °C, 600 °C, 700 °C, 800 °C, and 900 °C, show that the high-temperature effect on the elastic modulus of rocks conforms to thermoelastic responses with a quadratic temperature function. This mineral lining is crucial to the geyser's formation, as geysers operate under tremendous pressure and the plumbing system must be able to contain this pressure for the geyser to function. 2. Hornfels, with its alternating bands of dark and light crystals is a good example of how minerals rearrange themselves during metamorphism. On the rock - if it is porous, then it will have a fairly high water content. 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