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Topic 1-3 - FR Haythorne Junior High
Topic 1-3 - FR Haythorne Junior High

... How do minerals combine to form rocks? Some of these processes are rapid. Others take millions of years. Scientists have grouped rocks into three major families, or types, based on how they form. The three families are: 1)Igneous 2)Sedimentary 3)Metamorphic rocks. Each can usually be identified by i ...
What happened 1.5 billion years ago?
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... occur in a few areas as gigantic bodies (many kilometers across) called batholiths. Although they crystallized from huge volumes of molten magma deep within the Earth's crust, they have no known volcanic (lava) equivalents on the Earth's surface. Other igneous rocks do have surface equivalents. If a ...
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Geochemistry and petrogenesis of extrusive rocks, dykes and high
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... in the Upper Allochthon of the Norwegian Caledonides in westernNorway (Furnes et al. 1990), where it crops out on a number of islands and skerries in the Solund-Stavfjord area (Fig. 1). A quartz diorite from within a high-level gabbro provided a U-Ph zircon age of 443 ± 3 Ma (Dunning & Pedersen 1988 ...
Sedimentary Rocks - Mr. Volpe`s Earth Science Emporium
Sedimentary Rocks - Mr. Volpe`s Earth Science Emporium

... Page 12 Rocks Chemical (crystalline) Sedimentary rocks are the only rocks that can be mono-mineralic. ...
rock-cycle
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The evolution of continental crust
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Rocks and minerals - Junta de Andalucía
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Chapter 9
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ES 3209 Unit 3 Aug 22 2011.indd
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Relative Dating Lecture
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Sinkholes and Acid Rain
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Seventh lecture - 23 September, 2015
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... a field of productive dispute for over the last 30 years. Many questions lie not only about the geotectonic environment and the petrogenetic processes which took place, but also on the number of oceanic basins which contributed to the formation of Othris magmatic rocks. Unanswered questions may be a ...
Precambrian Time
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... outcropping edges. However, this might not be possible when the rocks are covered by soil and vegetation. You can correct this problem by noting the position of a distinctive rock layer in a sequence of strata. Or, you might be able to identify a rock layer in another location if it is composed of v ...
Chapter 16. Island Arc Magmatism
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... Even small amounts of water (0.5%) and carbon dioxide (0.5%) strongly depress the temperatures of the solidus, moving it below the geotherm at all depths. This effect dominates in subduction environments, where arc magmas are generated. (Modified from B. M. Wilson (1989) Igneous ...
Chapter 6 Lecture PowerPoint Handout
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GEOL 1e Lecture Outlines
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... are unique in their metamorphic grade and preservation of sedimentary structures. • The JMS contains lower grade rocks compared to rocks further to the east in the Garnet Hill or Junction Butte areas (Fig. 2) • The primary goal of this study was to use quantitative thermobarometry to determine the m ...
Carbonate Rocks
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... particles tend to settle together, either on land or at the bottom of a body of water. In time, this accumulated sediment becomes lithified, or transformed into a solid material. Unlike both igneous rock, which is formed when volcanic lava or magma solidifies, and metamorphic rock, which is formed u ...
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... proceed in the "reverse" direction, with the minerals attempting to equilibrate under the new (lower T) conditions. Reactions which proceed easily in the "reverse" direction will therefore not be suitable for determining the peak or maximum T of formation of the igneous or metamorphic rock. Such ret ...
Ch 3
Ch 3

... some organisms. ...
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Igneous rock



Igneous rock (derived from the Latin word ignis meaning fire) is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rock is formed through the cooling and solidification of magma or lava. Igneous rock may form with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks. This magma can be derived from partial melts of pre-existing rocks in either a planet's mantle or crust. Typically, the melting is caused by one or more of three processes: an increase in temperature, a decrease in pressure, or a change in composition. Over 700 types of igneous rocks have been described, most of them having formed beneath the surface of Earth's crust.
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