A soft earth, which is plastic, or may be molded with the hands, consisting of hydrous silicate of aluminium. It is the result of the wearing down and decomposition, in part, of rocks containing aluminous minerals, as granite. Lime, magnesia, oxide of iron, and other ingredients, are often present as impurities.
Earth in general, as representing the elementary particles of the human body; hence, the human body as formed from such particles.
Medium used in some elements; usually a blend of attapulgas and montmorillonite clays.
Any of a number of hydrous aluminosilicate minerals with sheetlike crystal structure, formed by the weathering and hydration of other silicates. Also, any mineral fragments smaller than 0.0039 mm.
Ya know the rain cycle? Water evaporates, raises into the sky, accumulates, gets to heavy to float as a gas, falls as rain on the mountains; as it rolls over the rocks ,it picks up small particles and carries them to streams, rivers and down to the sea. Well, those slimey little particles that accumlate on the river bottoms are what we call clay. Over the millinia they form deposits and we mine it. When heated to a high temperture it is no longer soluable in water and it becomes permainently hard.
A clastic mineral particle of any composition that has a grain size smaller than 1/256 mm. The term is also used in reference to a broad category of hydrous silicate minerals in which the silica tetrahedrons are arranged into sheets.
a mineral substance formed when rocks are 'weathered' or broken down by water. Clay is used with graphite to make the lead in pencils.
An inorganic soil component having particles that are less than 0.002 millimetres in diameter.
A particle less than 0.004mm (4 micrometers) in diameter. Also a group of layer-silicate minerals characterized by poor crystallinity and fine particle size.
Sedimentary material composed of fragments with a diameter of less than 1/256 mm. Clay particles are smaller than silt particles.
A fine-grained mineral material used as a filler in papermaking or as coating pigments.
Clay is a wonderful sculpting material that is made up of many types and textures. Once molded, it's then fired in a kiln for a predetermined amount of time depending on the actual clay itself, as some types require more time in the oven than others.
Fine grained sediment, with a particle size of less than two-thousandths of a millimeter. Clay has the property of plasticity when wet.
Any of the earthen materials used to make ceramic items. It becomes hard when fired at high temperatures.
A constituent of soils that consists of particles less than 0.002 mm in size.
very fine soil particles; it is smooth and can hold nutrients, but water and air do not move through it well
a rock or mineral fragment being smaller than 0.00016 inches (1/256 millimeters ) in diameter.
First read the entry on cations. Ok. Because clay is attracting cations, fertilizers (which are comprised of many minerals that will readily form cations in solution) will become "attached" to the clay, rather than be left available for the plant they were intended for. To prevent this, lime can be added to the soil ahead of time. The lime releases a preliminary batch of cations that will effectively neutralize most of the clay and thereby allow fertilizers to reach plants. Clay particles are the smallest inorganic component of soil, measuring no more that .002 mm across. In a soil heavy in clay, water and air will have trouble penetrating and reaching soil organisms and plants. Break up clay soils by adding organic material.
A water softened rock, composed of Aluminium Silicate, that can be moulded to shape. When fired it becomes a ceramic. Main use in the production of pottery. See ARTIFACTS or KILN
a fine grained and heavily textured soil that is known for its ability to hold water and nutrients.
Very fine-grained sedimentary rock. It is a soft rock that forms a paste when mixed with water, and hardens when baked. It is mainly used to make bricks.
A naturally occurring earthy mineral that is plastic when wet but becomes permanently hard when heated. Clays are formed by the weathering of feldspathic rock. Primary clays are found at the site of the parent stone while secondary clays are found downstream. Clays are composed of hydrated aluminum silicates, such as kaolinite, illite, palygorskite, attapulgite, bentonite, and montmorillonite. Small amounts of other minerals can change the color (white, yellow, brown or red) and texture of the clays. When pure, clay is a fine, white, amorphous powder which becomes plastic when water is added. At high temperatures, clays became hard due to the loss of water and are used to make pottery, porcelain and bricks. Clay is also used as a filler and whiting in paper, paints and grounds.
A flat or plate shaped mineral or soil grain, less than 0.002 mm across. Clay is also the name of a specific soil texture that contains 40 percent or more particles of clay size.
Very fertile, heavy, moisture-retentive soil, prone to compaction and surface capping.
A size fraction less than 0.002mm in equivalent diameter. Using the UK classification a clay soil contains 35% or more clay and less than 45% sand and less than 45% silt (of course the total components would not exceed 100%).
A fine-grained material composed of hydrous aluminum silicates.
is soil particles consisting of mineral particles less than 0.002 mm in diameter. Many of the properties of soil depend on the type and quantity of clay particles in the soil.
firm, fine-grained earth produced by the chemical decomposition of rocks; when mixed with water it is used to make bricks, pottery, and other ceramics
particles less than 1/256 mm in size
General term for a natural fine-grained material, kaolin, which is used as filler and as coating pigments in paper manufacture.
A group of submicroscopic silicate minerals related to mica. Clay-sized particles are less than 0.0039 mm in diameter.
A fine grained soil or the fine grained portion of a soil that can be made to exhibit plasticity within a range of water contents, and which exhibits considerable strength when air dry. Clay particles are smaller than 0.074mm (#200 sieve) and must plot above the A- line on the plasticity chart (ASTM D2487).
as a soil separate, r ock or mineral soil particles .002 mm in diameter. As a soil textural class, soil material that is 40 % or more in clay, 45 % sand, and 40 % silt.
Cohesive soil whose individual particles are not visible to the unaided human eye (less than 0.002 mm in diameter). Clay can be molded into a ball that will not crumble.
natural earth material with various applications in sculpture: a material that can be manipulated or moulded by hand, when moist. It can be dried in the air or fired in a kiln to make it a permanent relatively nonporous material: used for the direct process of modelling: clay models are used for the indirect process of casting. See also Modelling Clay
A fine-grained natural material which when wet is characterised by its plasticity, the property which allows it to be deformed by pressure into a desired shape without cracking and to keep this shape when the pressure is removed. In addition to clay minerals (q.v.), clay typically contains quartz and may contain other minerals such as feldspar, calcite and iron oxide. The clay body must be carefully prepared to remove foreign matter such as stones or roots, and be mixed evenly throughout.
a very fine-grained soil that is plastic when moist but hard when fired
a fine-grained earthy material which results from the weathering and decomposition of rocks
a fine textured soil usually forms very hard lumps or clods when dry and is quite plastic and is usually sticky when wet
a soft thin platy mineral
A minute soil particle less than .002 mil. in diameter.
soil particles visible only with magnification of 100 power or more; plate-like in shape (less than .002 millimeter in diameter).
Tiny soil particles less than 0.002mm in diameter. Clay is sticky when wet. Clay soils have at least 40% clay in them with less than 45% sand or 40% silt.
bodies are mixtures of different types of clays and minerals for a specific ceramic purpose.
soil made of very tine organic and mineral particles: Clay is not suitable for container gardening.
Clay is a natural, earthy material that can tightly attach itself to surfaces making removal difficult.
A textural class of soils consisting of particles less than 0.002 millimeters in diameter.
A mineral particle of any composition having a diameter less than 0.002 mm.
A particle whose diameter is in the range of 0.00024 to 0.004 mm.
Mud; moist, sticky dirt. In ceramics, clay is the basic material, usually referring to any of a certain variety of mixtures of such ingredients - fine-grained, firm earthy material that is plastic when wet, brittle when dry, and very hard when heated. The most common types of ceramic clays are earthenware (terra cotta is an example), stonewares, and porcelain. Also, a hardening or nonhardening material having a consistency similar to clay, often called modeling clay or Plasticine.
Very fine sediment particles that are less than 0.004 mm in diameter - component of mud
Particles with a diameter of less than 0.002mm. They are plate like in shape.
Earth that is used in ceramics, it is wet and hardens after drying or heating.
soil which consists of illite, kaolin, micas, vermiculite, and other mineral particles; clay particles are small and the spaces between them are small; clay soils absorb water slowly but can hold water for longer than a sandy soil.
granular or finely divided mineral materials used for treating petroleum. Clays used in petroleum processing include fuller's earth, bauxite, bentonite, and montmorillonite. Most common clay used in the decolorization of petroleum waxes is bauxite.
A weathered form of aluminosilicate mineral particles, less than 0.002 mm in diameter.
The putty-like portion of soil particles that when watered and air-dried, can exhibit a strong plastic-like nature.
a very fine-grained material consisting of quartz, hydrated aluminium silicate and fragments of organic matter, occurring in soils and sedimentary deposits. It has remarkable plasticity when wet, becoming hard upon heating, qualities which have seen its use in the manufacture of bricks, tiles, ceramics, cement, etc; from Old English claeg, related to Old German klia, Latin glus, Greek gloios 'glue, sticky oil'.
soil type composed of small particles, usually reddish to gray in color.
A family of aluminum- and silica-rich minerals that commonly form by reaction of feldspars with hydrothermal solutions. See also kaolinite.
is a component of most soils. Composed mainly of fine particles of hydrous aluminum silicates and other minerals, it is plastic when moist but hard when fired. It is abundant, found in concentration at the bottoms of streams or rivers or in veins of earth where pre-historic streams were located. Artists use it because of it's versatile modeling and finishing potentials and because once fired it becomes a hard, rock-like body that lasts for centuries.
A natural, fine-grained earthlike material, the product of the geological weathering or aging of the surface of the earth. The root of the word "clay" is "sticky": sticky soil.
A soil component consisting of very fine particles (0.002 mm diameter). Clay particles provide ample surface area for adsorption of molecules. Clay soils provide the most resistance to leaching. Soil texture and many other soil characteristics are determined by the relative amounts of sand, silt, clay and loam in a soil.
a term given to hydrous silicates of aluminia generally deriving from the decomposition of earlier rocks. Examples are slate clay, fire clay, plastic clay, china or porcelain clay and common clay or loam.
The mineral soil particles less than 0.002 millimeters in diameter.
A mixture of very fine grains of micaceous substances. Clay is plastic when wet and hardens when heated. It consists mainly of hydrous aluminum silicates.
very fine-grained soil or sediment
1) A detrital mineral particle of any composition having a diameter less than 1/256 mm (4 microns) 2) An earthy, extremely fine-grained sediment composed of clay-size or colloidal particles, having high plasticity and clay mineral content. Clays may be classified by use, origin, mineral composition, or color 3) A term commonly applied to any wet, adhesive earth material such as mud
Clay consists of tiny particles of minerals (rocks) which were carried along by rivers in previous geological years and then deposited in the earth, now excavated. Variously enriched and colored by the particulars of their geographical location, clays may be red, green, or white and their properties vary according to the trace elements they contain. Used for health and beauty treatments throughout the ages, in both mud packs and face masks. Its drawing action removes impurities from deep within the pores, leaving the skin clean, clear, and stimulated. Burt's Bees uses green, white, and sea clays in our cosmetic formulations.
product of weathering and river erosion. Porous and becomes impermeable when wet. Rivers
A family of platy silicate minerals that commonly form as a product of rock weathering. Also, any particle smaller than 1/256 of a millimeter in diameter. more details...
Clay - A fine-grained inorganic material (grains less than 0.005 mm in diameter) that has a very low permeability and is plastic (malleable).
A white, mined mineral used as an extender - mostly in interior paints.
an earthy material that is plastic when moist but hard when fired, that is composed mainly of fine particles of hydrous aluminum silicates and other minerals
as a particle-size term: a size fraction less than 0.002 mm in equivalent diameter, or some other limit (geologists and engineers). As a rock term: a natural, earthy, fine grained material that develops plasticity with a small amount of water. As a soil term: a textural class. As a soil separate: a material usually consisting largely of clay minerals but commonly also of amorphous free oxides and primary minerals.
Material composed and derived from the decomposition of rock which consists of microscopic particles.
Substrate particles that are smaller than silt and generally less than 0.004 mm in diameter.
Earthern materials, that hardens when fired at high temperatures and is used to make ceramic items.
The decomposition of granite through the process of Kaolinisation creates clay. Clay is a mineral with a plate (platelet) like structure; it is these plates (about 0.5 microns across) which, when lubricated with water, slide against one another to form the plastic mass we know as Clay. 'Primary' clays are those found close to the area of Kaolinisation and hence the purest (China Clays). Secondary clays are those moved by water away from the site of Kaolinisation and get progressively more plastic and less pure (Ball Clays, fire clays, Earthenware and marls).
earthy material, essentially hydrated silicates of igneous rock debris. Turns plastic when wet, and is deposited in river beds, lake beds and flood plains..
clay soil particles are very the smallest soil particles and are capable of large changes in apparent volume when exposed to moisture; some clays will measurably change volume due merely to changes in the relative humidity of the air
A hydrous (wet) mix of aluminum and silicate minerals. Usually formed by weathering of silicate rocks (many sedimentary rocks, including shale). Clay retains its water better than mud, as the water is chemically bound to the minerals. This binding, along with the small size, allows for high plasticity. Clay formations will expand and contract depending on water content, yielding unstable geology.
Basically, a decomposed, feldspathic, granite-type rock. To be classed as a clay, the decomposed rock must have fine particles so that it will be plastic and the fluxes present in the parent feldspar have been leached out by the action of water. Clays should be free of vegetable matter but will often contain other impurities which affect their color and firing temperatures. They are classified into various types, such as ball clays, fire clays, and slip clays. Pure clay chemically is AlO 2SiO 2HO. This formula is often used as a generality for most clays.
a. Soil that is plastic when moist but hard when fired. b. Water soaked soil; soft wet earth.
A natural, earthy, fine-grained material, which develops plasticity when mixed with a limited amount of water; composed primarily of silica, alumina and water.
(i) A soil separate consisting of particles 0.002 mm in equivalent diameter. (ii) A textural class. (iii) A naturally occurring material composed primarily of fine-grained minerals, which is generally plastic at appropriate water contents and will harden when dried or fired.
( Ped.). () The finest soil particles, under 0.002 mm. in diameter. See Soil texture. () Also a soil containing a high proportion of such particles. ( BCFT modif.).
A natural, mineral aggregate consisting essentially of hydrous aluminum silicate; it is plastic when sufficiently wetted, rigid when dried and vitrified when fired to a sufficiently high temperature.
One type of soil particle with a diameter of approximately one ten-thousandth of an inch.
Clay minerals are silicate minerals which form very small platy crystals, between the layers of which water can be absorbed. Clay as a sedimentary rock is an accumulation of clay minerals to form a thick sticky deposit. For clay minerals to be deposited from water, the water must be nearly still, and therefore clays often represent very quiet marine, lake or river backwater environments.
A fine grained SEDIMENT with a typical grain size less than 0.004 mm. Possesses electromagnetic properties which bind the grains together to give a bulk strength or cohesion.
A fine-grained geological material with particle sizes less than 2 microns and practically impervious.
a fine type of soil and rock. Clay sometimes may not been seen, as it is underneath the soil bed.
A soil separate (particle size fraction) consisting of particles less than 0.002 mm in equivalent diameter.
the basic material for all ceramic ware is clay, a soft earth that is plastic, or may be molded with the hands, consisting of hydrated silicates of aluminum. It is the result of the wearing down and decomposition, in part, of feldspathic rocks containing aluminous minerals, such as granite.
Soil particles whose diameter is less than 0.002 mm.
suspended sediment or bed material with a particle size of 0.00024-0.004 mm in diameter, smaller than a grain of sand.
An earthy material that is plastic when moist but hard when fired, composed mainly of extremely fine plate-like mineral particles.
Fine-grained soil or the fine-grained portion of soil that can be made to exhibit plasticity (putty-like properties) within a range of water contents, and that exhibits considerable strength when air-dry. The term can designate soil particles finer than 0.002 mm (0.005 mm in some cases).
A sedimentary material with grains smaller than 0.004 millimeters in diameter.
1.) sedimentary grains 1/256 mm. 2.) fine particles of aluminum silicates and other minerals typically both definitions apply.
Type of soil consisting of very fine particles.
A fine grained, firm-natural earthy material used in the making of pottery.
(i) A mineral soil separate consisting of particles less than 0.002 mm in diameter; (ii) a soil textural class; (iii) (engineering) - a fine grained soil that has a high plasticity index in relation to the liquid limit.
A natural earthy material, plastic when wet, that is used for pottery or modelling.
A naturally occurring inorganic substance composed of very small "plate- like" particles. These particles, when mixed with water as a lubricant, can slide past each other with relative ease. Known as "plasticity" or "workability", this gives clay its unique characteristic. Clay with finer particles is said to be more plastic than coarser clays but there is also more shrinkage during the drying and firing process. The various classifications of clay are determined by size, color, chemical make-up and purity. See also claybody, porcelain, china.
As a soil seperate, the mineral soil particles less than .002 millimeter in diameter. As a soil textural class, soil materil that is 40 percent or more clay, less than 45 percent sand, and less than 40 percent silt.
1. a mineral soil separate consisting of particles less than 0.002 mm in equivalent diameter. 2. a soil textural class. 3. a fine-grained soil that has a high plasticity index in relation to the liquid limits (engineering). 4. a specific mineral structure.
Extremely small sedimentary* particles that are less than 0.004 mm in diameter.
A sedimentary deposit that has plastic properties when wet and hardens and cracks when dry. See China Clay and Bentonite
Deep-cleansing and highly absorbent. Bentonite and green clay are two types of natural clay.
fine particle soil (high water retention) pH a measure of hydrogen ions in soil volunteer a tree that comes up on its own
A very fine grained material, smaller than silt (clay has a diameter of less than 1/256 mm). Clay is formed by the weathering and breaking down of rocks and minerals.
Also known as China Clay, this fine, mineral-rich, powder helps draw oils from your pores while ridding the skin surface of dead cells and dirt. See Bentonite.
Mineral particle with a size less than 0.004 millimeters in diameter. Also see silt and sand.
A mixture of water an powder from decomposed feldspar. Clay is the potter's basic material. When moist it is soft and plastic; when fired becomes permanently hard.
Soil particles less than 0.002mm in size.
A type of naturally-occurring hydrated aluminum silicate (Al2O3SiO2 x H2O) soil. Natural clay is activated and used as a coagulant adsorbent filter aid.
Firm, finely ground earth which is produced by the chemical decomposition of rocks or the deposit of fine rock particles in water and is used in the manufacture of brick, pottery and other ceramics due to its plasticity and ability to be molded when wet but drying hard.
1. Fine-grained earth materials formed by the decomposition of igneous rock; when combined with water, clay is plastic enough to be shaped; when dry, it is strong; when subjected to red heat or above, it will become progressively more dense and rock-like. 2. A compound of decomposed and altered feldspathic rock consisting of various hydrated silicates of aluminum along with non-plastics, such as quartz, and organic matter. It is also used as a source of alumina and silica in glazes.
Mineral soil characterized by extremely small particles, not necessarily clay minerals, that are less than 0.074 mm in their maximum dimension, the finest of any soil type. Common elsewhere but not so much in the BWCA.
An extremely fine-grained, natural sediment or soft rock composed of particles less than 4 microns.