A coal basin formed inland from the seacoasts, as opposed to a paralic
coal basin. AGI
See:bog iron; bog iron ore.
A rock composed of cryptocrystalline and amorphous hydrated iron
oxyhydroxides, generally predominantly goethite with or without adsorbed
water, but also akaganeite, feroxyhyte, or lepidocrocite; may be yellow,
red, brown, or black; hardness variable; an oxidation product of iron
(rust) or iron-bearing minerals and may be pseudomorphous after them; as a
precipitate, both inorganic and biogenic, in bogs, lakes, springs, or
marine deposits; and as a variety of stalactitic, reniform, botryoidal, or
mammillary deposits. It colors many yellow clays and soils and is a minor
ore of iron. See also:iron ore; brown hematite; brown umber.
CF:bog iron ore
meadow ore; yellow ocher.
Consisting of or resembling limonite.
A metasomatic rock found at the contact of calcareous rocks with intruded
granite and consisting of more than 50% axinite. Other minerals include
diopside, actinolite, zoisite, albite, and quartz.
See also:calc-silicate hornfels
A monoclinic mineral, 2[PbCu(SO4 )(OH)2 ] ; azure blue; in
oxidized zones of lead, copper, and silver deposits.
A monoclinic mineral, H2 Cu5 (AsO4 )4 .8-9H
2 O ; green; forms rosettes and reniform masses with one perfect
cleavage.
A monoclinic mineral, Cu3 (MoO4 )2 (OH)2 ;
green; in tabular crystals from Chuquicamata, Chile.
An orthorhombic mineral, Pb3 Cu3 Bi7 S15 .
Also spelled lindstroemite.
a. The limit of a surface; a length without breadth; an outline; a
contour. Fay
b. The course in which anything proceeds, or which anyone takes; direction
given or assured. Fay
c. A cable, rope, chain, or other flexible device for transmitting pull.
Nichols, 1
d. To line pieces up in order to couple them together. Nichols, 1
e. See:plumbline
An imperfection in a crystal structure characterized by a series of line
defects, but not extensive enough to form a grain boundary.
CF:grain boundary; crystal defect.
A foot in length as distinguished from square foot or cubic foot.
Crispin
Commonly used as a syn. for peripheral speed, as applied to bit rotation;
also, a syn. for rope or cable speed, as applied to hoisting. Long
a. A significant line of landscape that reveals the hidden architecture of
the rock basement. Lineaments are character lines of the Earth's
physiognomy. AGI
b. A topographic feature; esp., one that is rectilinear.
Webster 3rd
c. A topographic line that is structurally controlled. Lineaments are
studied esp. on aerial photographs. Sometimes inappropriately called a
linear. Billings
Arranged in a line or lines; pertaining to the linelike character of some
object or objects.--n. Not recommended as a syn. of lineament. AGI
A high-quality, biodegradable detergent, obtained from lignite tar, which
is derived from carbonizing coal at low temperatures.
A fabric element having one dimension that is much greater than the other
two. Lineations are the common linear elements. CF:planar element;
equant element. AGI
The increase in one dimension of a soil mass, expressed as a percentage of
that dimension at the shrinkage limit to any given water content.
ASCE
A function frequently used when fitting mathematical models to
experimental variograms, often in combination with a nugget model.