what kind of rock is basalt

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  • Basalt: Igneous Rock

    What is Basalt? Basalt is a dark-colored, fine-grained, igneous rock composed mainly of plagioclase and pyroxene minerals It most commonly forms as an extrusive rock, such as a lava flow, but can also form in small intrusive bodies, such as an igneous dike or a thin sill...

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  • Interactives The Rock Cycle Types of Rocks

    Types of Rocks Rocks are not all the same! The three main types, or classes, of rock are sedimentary, metamorphic, and igneous and the differences among them have to do with how they are formed Sedimentary Sedimentary rocks are formed from particles of ,...

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  • What Kind of Basalt?

    The two regions had mineral abundances similar to basalt (Surface Type 1, in the south) and andesite (Surface Type 2, in the north), two common volcanic rock types on Earth Andesite has more silicon than does basalt, giving rise to a distinctive mineralogy...

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  • Basaltic and Gabbroic Rocks

    Although basaltic and gabbroic rocks are found in nearly all tectonic settings, they are the predominant igneous rock types of the ocean basins...

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  • What kind of rock is basalt

    Basalt is an extrusive igneous rock, which means it has solidified from magma above ground It is a mafic rock, meaning that it is relatively high in heavier element content, particularly magnesium and iron...

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  • "lava rocks"

    Basalt and related rock types like andesite and dacite are rocks that form when volcanoes erupt magma (lava) onto the surface of the earth and the magma cools...

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  • Basalt | Definition of Basalt by Merriam

    Basalt definition is - a dark gray to black dense to fine-grained igneous rock that consists of basic plagioclase, augite, and usually magnetite a dark gray to black dense to fine-grained igneous rock that consists of basic plagioclase, augite, and usually magnetite,...

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  • Basalt Textures

    Reading the Rocks is a fundamental geological activity and consists of describing very carefully the details shown in a rock and then interpreting the conditions of formation from those characteristics Earth history has been illuminated by reading rocks Basalt is mainly made of two minerals: Plagioclase feldspar and pyroxene Basalt has several textural varieties such as glassy, massive ....

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  • Geology of North Cascades National Park

    Metamorphic rocks in the North Cascades formed from pre-existing rocks of every kind and from all of the major rock groups, igneous, sedimentary, and metamorphic For example, mica schist , a common metamorphic rock in the North Cascades, recrystallized from shale...

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  • what kind of rock is basalt

    Pillow Basalt FAQ - Golden Gate National Recreation Area , Where does pillow basalt form? Pillow basalt is a volcanic igneous rock that forms when lava of basaltic compositionis erupted underwater...

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  • Basalt Rocks

    Basalt is an extrusive igneous rock that is very dark in color It is the most common type of rock in the Earth's crust and it makes up most of the ocean floor It is made of many dark colored minerals such as pyroxene and olivineBasalt also contains some light colored minerals such as feldspar and quartz, but the amounts are small...

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  • What type of rock is Basalt

    Basalt is igneous Basalt and Granite are the two most commonly known igneous rocks It is formed from magma (a melt) and hardens to become basalt...

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  • List of rock types

    The following is a list of rock types recognized by petrologistsThere is no agreed number of specific types of rocks Any unique combination of chemical composition, mineralogy, grain size, texture, or other distinguishing characteristics can describe rock typ...

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  • Igneous Rocks: Everything You Need to Know

    All igneous rocks have one thing in common: they occur from the cooling and solidification of molten material Learn more about this kind of rock , The two best-known igneous rock types are basalt and granite, which have distinctly different compositions and textur Basalt is the dark, fine-grained stuff of many lava flows ,...

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  • Chapter 4 Rocks and Minerals

    Chapter 4 Rocks and Minerals Chapter 4 focuses on Rocks and Minerals, looking at types of rocks , The lava has cooled and is now a volcanic rock called basalt The weathering process will break the basalt down into small, finer pieces of rock called soil , This changing of rock types is called the "Rock Cycle"...

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  • Pictures and Descriptions of Igneous Rock Types

    Rhyolite...

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  • Soil Formation

    The major two types of rocks on Earth are granite and basalt While granite is prevalent on most of the continental United States, the primary parent rock material on Maui is basalt (Table 2) On Maui, basalt rock formed from the slow-moving lava flows of the East and West Maui shield volcano...

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  • Igneous Rocks & Plate Tectonics

    The easiest to employ uses the modal mineralogy of the rocks, while others attempt classification on the basis of the tectonic setting, or type of source rock which melted to produce the granitic magma...

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  • what kind of rock is basalt

    Geology - rocks and minerals - University of Auckland Basalt Basalt is a mafic extrusive rock, is the most widespread of all igneous rocks, and comprises more than 90% of all volcanic rocks Because of its relatively low silica content, basalt lava has a ,...

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  • Aquifer by rock type

    Aquifer Basics Links Home Igneous and metamorphic-rock aquifers The principal water-yielding aquifers of North America can be grouped into five types: unconsolidated and semiconsolidated sand and gravel aquifers, sandstone aquifers, carbonate-rock aquifers, aquifers in interbedded sandstone and carbonate rocks, and aquifers in igneous and metamorphic rocks...

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  • Igneous Rocks

    If olivine is present the rock is called olivine basalt Microscopic examination show the groundmass to consist of plagioclase (usually labradorite), pyroxene, olivine and magnetite, with a wide range of accessory minerals...

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  • The Columbia River Basalt Group

    the columbia river basalt group The Columbia Basin of eastern Washington is plastered with deep layers of a fine grained black rock known as basalt The basalt is lava that cooled and hardened after it flooded over the landscape...

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  • Metamorphic Rocks

    Metamorphic rocks can be formed from any rock type: igneous, sedimentary, or existing metamorphic rocks Involves recrystallization in the solid state, often with little change in overall chemical composition...

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  • Learn About Rocks

    An example of a mafic rock is basalt, the black rock that forms from lava flows in places like Hawaii An example of a felsic rock is granite, the light colored rocks that we find in places like the Sierra Nevada mountains in California...

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  • What are the types of igneous rock?

    An igneous rock is formed by the cooling and crystallization of molten rock The term igneous is derived from ignius , the Latin word for fire Scientists have divided igneous rocks into two broad categories based on where the molten rock solidified...

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  • Basalt Rocks

    Basalt Rocks Introduction Basalt rocks are the most common dark-colored igneous rocks you will find They contain ferrogmanesian minerals which are iron and magnesium rich The shield volcanoes of Hawaii, cinder cones in the Pacific Northwest and the floors of the world's oceans are made of basalt...

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  • What is Basalt?

    Basalt is an igneous rock that forms from the cooling and crystallization of magma And usually, magma is formed from the melting of dark colored peridotite and pyroxene-rich rocks...

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