sandstone


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sandstone,

sedimentary rockrock,
aggregation of solid matter composed of one or more of the minerals forming the earth's crust. The scientific study of rocks is called petrology. Rocks are commonly divided, according to their origin, into three major classes—igneous, sedimentary, and metamorphic.
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 formed by the cementing together of grains of sand. The usual cementing material in sandstone is calcium carbonate, iron oxides, or silica, and the hardness of sandstone varies according to the character of the cementing material; quartz sandstones cemented with quartz are the hardest. Sandstones are commonly gray, buff, red, or brown although green and some other colors are also found. Green sandstones often contain, in addition to sand and glauconite, fossil shells and iron oxides; those that break apart easily are known as greensands and are sometimes used to replenish depleted potash in soils. Sandstones are widely used in construction and industry. Varieties of sandstone include arkose, which contains feldspar and resembles granitegranite,
coarse-grained igneous rock of even texture and light color, composed chiefly of quartz and feldspars. It usually contains small quantities of mica or hornblende, and minor accessory minerals may be present.
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, and graywacke, a gray or sometimes greenish or black rock composed of quartz and fledspar with numerous fragments of other rocks, such as shale, slate, quartzite, granite, and basalt. Sandstone may be crushed to the form of loose sand grains, which can then be put to the same industrial uses as sand. See brownstonebrownstone,
red to brown variety of sandstone. Its unusual color is caused in some instances by the presence of red iron oxide which acts as a cement, binding the sand grains together.
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sandstone

Sedimentary rock that is composed of sand-sized grains naturally cemented by mineral materials. See also: Stone

Sandstone

 

a sedimentary rock composed of sand grains cemented by clay, carbonate, siliceous, or other material. Like sand, sandstones are divided into small-grain (0.1–0.25 mm), medium-grain (0.25–0.5 mm), and large-grain (0.5 mm) varieties according to the predominant particle size. They are also divided mineralogically into monomineral and polymineral quartz sandstones, arkosic sandstones, and graywackes.

The density of sandstone is 2,250–2,670 kg per cu m; its porosity is 0.69–6.70 percent, and its water absorption, 0.63–6.0 percent. Sandstone with siliceous and carbonate cementing material has the best physicomechanical properties, and sandstone with clay cement, the poorest. The refractoriness of sandstone also differs, with the greatest heat resistance (up to 1,700°C) characteristic for pure quartz sandstone with siliceous cement. Sandstone is used in construction as wall and facing material and in rubble work. It is also used to make gravel for road building and concrete-making. Quartz sandstone with a SiO2 content of more than 95 percent is used in the production of Dinas brick, as a flux in smelting copper and nickel, and in manufacturing glass.

sandstone

[′san‚stōn]
(petrology)
A detrital sedimentary rock consisting of individual grains of sand-size particles 0.06 to 2 millimeters in diameter either set in a fine-grained matrix (silt or clay) or bonded by chemical cement.

sandstone

Sedimentary rock composed of sand-sized grains, naturally cemented by mineral materials. In most sandstone used for building, quartz grains predominate; often used for decorative elements in buildings because it is easy to carve.

sandstone

any of a group of common sedimentary rocks consisting of sand grains consolidated with such materials as quartz, haematite, and clay minerals: used widely in building
References in periodicals archive ?
GY-672 is the first new well for over 35 years to be drilled and completed in the Goudron Sandstone and its recompletion was designed to test the viability of production from this widespread shallow reservoir.
Peter Sandstone mined from Ottawa, Illinois (Maslowski, 2012), is used as a standard by the American Society of Testing Materials (ASTM) (Zdunczyk, 2014).
The 120-mile (193 kms) mountain bike trail between Berwick-upon-Tweed and Hexham passes through numerous villages including Wooler, Belford, Rothbury, Elsdon and Bellingham, taking in the Simonside sandstone ridge and other features of Northumberland National Park.
99, with a minimum of PS2 from each sale going towards improving the Sandstone Way experience.
That means that theoretically when we found the sandstone we were supposed to paint over it.
There are eight kinds of sandstone picked by the manufacturer.
Sandstone forms when tiny sand grains bind together into a solid mass.
Geologists from academia and oil companies concentrate on the occurrence, distribution, and character of lacustrine sandstone reservoirs and put them into a context of hydrocarbon systems and depositional processes.
Also the sandstone has been left rough and isn't nice to touch or good to look at; before it was lovely and smooth to the touch.
This talk addresses the deposition, zonation, and potential source for the sandstone deposits seen in Wyoming.
The Surprise ST-1 well has reached a Total Depth of 2,732m RKB within the Pacoota Sandstone.