See:microcrystalline
A brown variety of gahnite containing manganese and iron in Massachusetts
and New Jersey.
See:dysprosium oxide
A rare-earth oxide; white; Dy2 O3 ; isometric; sp gr, 7.81
(at 27 degrees C); and melting point, 2,340+ or -10 degrees C. Used as a
nuclear-reactor control-rod component and a neutron-density indicator.
Syn:dysprosia
See:datolite
Having an imperfect fracture or cleavage. Fay
An isometric mineral, In(OH)3 ; an alteration of indite; associated
with cassiterite ores.
Possibly an amorphous lead rhenium sulfide found in the Dzhezkazgab copper
ores, Kazakhstan.
A concretionary nodule of clay ironstone about the size of a walnut that
the ancients believed an eagle takes to her nest to facilitate egg-laying.
Syn:aetite
The inlet or intake of a fan. Fay
A mineral, Ca3 (C6 H5 O7 )2 .4H (sub 2)
O ; forms as fine-grained nodules in sediments under the Weddell Sea off
the Atlantic coast of Antarctica.
a. Amber that is mined rather than from the sea. Also called earth stone.
b. Amber with its surface deteriorated in luster, transparency, and color.
a. A hand-boring tool for testing clays, soils, or shallow deposits.
See also:auger
b. A dry-sampling device consisting of a helical-fluted rod encased by a
cylindrical tube. The fluted rod is equipped with cutting edges, and the
cuttings collect and are retained within the tube. Long
A variety of asphalt. Tomkeieff
An auger for boring into the ground, working in a cylindrical box to
retain the cut earth until the tool is withdrawn. Standard, 2
A light electric current apparently traversing the Earth's surface but
that in reality exists in a wire grounded at both ends, due to small
potential differences between the two points at which the wire is
grounded. Syn:telluric current
A dam constructed of earth material (such as gravel, broken weathered
rock, sand, silt, or soil). It has a core of clay or other impervious
material and a rock facing of riprap to protect against wave erosion.
AGI
An auger. Nichols, 1
Applied to conductors, connected to the general mass of earth in such a
manner as will ensure at all times an immediate discharge of electrical
energy without danger. Nelson
Electrically, one with one neutral point or pole connected to earth.
Pryor, 3
Electrical short circuit from live conductor to earth. Pryor, 3