2 edition of Chemical comparison of glassy and crystalline volcanic rocks found in the catalog.
Chemical comparison of glassy and crystalline volcanic rocks
Peter W. Lipman
Includes bibliographical references (p. 23-24).
|Statement||by P. W. Lipman ; prepared on behalf of the U.S. Atomic Energy Commission.|
|Series||Contributions to general geology, Geological Survey bulletin -- 1201-D|
|Contributions||U.S. Atomic Energy Commission.|
|The Physical Object|
|Pagination||iii, 24 p. :|
|Number of Pages||24|
Metamorphic Rocks All of the rocks listed below occur in Michigan. rocks VOLCANIC BRECCIA or CONGLOMERATE - fragments over 4 millimeters in diameter VOLCANIC TUFF or ASH SCORIA is a vesicular igneous rock of fine or glassy . Volcanic glass is the amorphous (uncrystallized) product of rapidly cooling all types of glass, it is a state of matter intermediate between the close-packed, highly ordered array of a crystal and the highly disordered array of gas. Volcanic glass can refer to the interstitial, or matrix, material in an aphanitic (fine grained) volcanic rock Artistic and historic techniques: Beadmaking, .
The glass you encounter most often is silicate glass, which consists mainly of silica or silicon dioxide, SiO 2. This is the type of glass you find in windows and drinking glasses. The crystalline form of this mineral is quartz. When the solid material is non-crystalline. We can list volcanic rocks that are formed at or near the surface by comparatively quick cooling of lava, cannot be classified without the aid of the microscope and chemical analysis, except roughly as light .
Sedimentary rock is classified into two groups based on how they form. They are clastic and chemical. Clastic sedimentary rock is formed as bits of weathered rock become cemented together. Because all kinds of rock are subject to weathering many different minerals can make up this group of rocks.3/5(3). Organic sedimentary rocks: Sedimentary rocks which are formed due to biogenic activity/processes or form from organic matter are called organic sedimentary rocks. Coal is a classic .
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CHEMICAL COMPARISON OF GLASSY AND CRYSTALLINE VOLCANIC ROCKS By P. LIPMAN ABSTRACT Groundmass crystallization of volcanic rocks is considered in terms of primary crystallization Cited by: Chemical comparison of glassy and crystalline volcanic rocks Bulletin D By: Peter W. Lipman. Chemical comparison of glassy and crystalline volcanic rocks (OCoLC) Material Type: Government publication, National government publication: Document Type: Book: All Authors /.
Paired chemical analyses, in weight percent, of glassy and crystalline rocks that have undergone secondary devitrification [A, glassy rocks; B, crystalline rocks] Advertisement Content uploaded by. oxides are recalculated to the reported totals, volatile free.
Analyses of glassy rocks (vitrophyres) are typically high in K 2 O and low in Na 2 O, due to alkali exchange (Lipman, ). Some devitrified. Volcanic glass is formed by rapid chilling of liquid lava when it comes into contact with the atmosphere, water, or cooler adjacent rocks.
It occurs mainly as obsidian, pitchstone, and perlite in lava flows, domes, and dykes, and as pumice, cinder, and ash in pyroclastic rocks. Volcanic glass is unstable and tends to change spontaneously (devitrify) from the glassy to the crystalline state in periods of time that are relatively short by geologic standards; the material takes on a stony appearance due to the presence of minutely crystalline ically ancient glasses are therefore very rare, and most glassy rocks.
Igneous Rock Aphanitic -- Vesicular (Chemical sedimentary rock (precipitated minerals or recrysta llized shells – interlocking microscopic crystalline.
In comparison to most ignimbrites and lavas from the central caldera cluster (Lipman, ), volcanic rocks of the northeast San Juan region (Bonanza and North Pass cycles) are modestly more. VOLCANIC BRECCIA is pyroclastic (fire-formed fragments) and forms in explosive eruptions.
It is a mix of large angular fragments and small ash. Often, the material is hot when it comes to rest and cools (welds) into a very hard rock. SEDIMENTARY ROCKS SEDIMENTARY ROCKS are composed of particles derived from pre-existing rocks File Size: KB.
Every rock has an individual property due to which it has its own unique uses. Rock Texture. Rock texture refers to shape, arrangement and distribution of grains within the rock. Some common rock textures are crystalline, fragmental aphanitic and glassy. Crystalline. Bentonite is a very widely distributed clay material that is the result of the devitrification and chemical alteration of glassy volcanic ash or tuff.
Bentonite should be used as the name of a rock derived from volcanic Cited by: EARTH AND PLANETARY SCIENCE LETTERS 6 () NORTH-HOLLAND PUBLISHING COMP., AMSTERDAM LOSS OF URANIUM FROM CRYSTALLIZED SILICIC VOLCANIC ROCKS Cited by: The volcanic rocks, in comparison, contain small crystals and may even develop a glassy appearance or even cool so fast that they trap gas bubbles in the rock.
This gives us very light, porous. Igneous rock is created by volcanic activity, forming from magma and lava as they cool and harden. It is most often black, gray, or white, and often has a baked appearance.
Igneous rock may form crystalline Author: Andrew Alden. This non-crystalline material is not classified as minerals but as volcanic glass.
This is a common component of volcanic ash and rocks like obsidian. Figure: Porphyritic texture. Some igneous rocks. There are few rock types that offer better opportunities for alteration studies (weathering, diagenesis, hydrothermal) than glassy volcanic and volcaniclastic rocks.
The main reason is that volcanic glass Cited by: Journal of Non-Crystalline Solids 17 () North-Holland Publishing Company CHEMICAL AND PHYSICAL PROPERTIES OF OBSIDIAN: A OCCURRING GLASS J.E. Cited by: Development of silicate-based cement from glassy alkaline volcanic rocks: interpretation of preliminary data related to chemical-mineralogical composition of geologic raw.
Igneous rock, any of various crystalline or glassy rocks formed by the cooling and solidification of molten earth s rocks constitute one of the three principal classes of rocks, the others being metamorphic and sedimentary. Igneous rocks are formed from the solidification of magma, which is a hot ( to 1, °C, or 1, to 2, °F) molten or partially molten rock.
Igneous rock - Igneous rock - Mineralogical components: The major mineralogical components of igneous rocks can be divided into two groups: felsic (from feldspar and silica) and mafic (from .Volcanic glasses such as obsidian form when some physical property of lava restricts ion mobility preventing an ordered crystalline pattern to develop, and for obsidian it is the viscosity that has the greatest control on the ordered crystalline pattern, the measure of viscosity is dependent on the temperature, crystal content and chemical.-Dark-colored, glassy rock-Forms when silica-rich lava cools quickly at Earth's surface-Usually black to reddish-brown in color-Similar chemical composition of granite-Dark color is the result of small amounts of metallic ions in an otherwise clear, glassy .