A breccia in which rubble, sand, and silt plus clay each constitute more
than 10% of the rock. AGI
A fracture resembling that of a lump of hard clay.
An earthy variety of cerussite.
See:wad; bog manganese.
a. In surveying, an easement curve is a transitional curve.
Pryor, 3
b. An incorporeal right existing distinct from the ownership of the soil,
consisting of a liberty, privilege, or use of another's land without
profit or compensation; a right-of-way. Fay
One of a number of holes surrounding a cut and fired immediately after it.
BS, 12
Holes drilled around the cut to enlarge the cut area so that the trimmers
may break out the ground to the required dimensions. The positioning and
number of the easer holes will depend upon the pattern of the cut shots.
McAdam, 2
A particular make of mechanical and photographic borehole-drift
indicators; the single-shot models are small enough to be used in EX
diamond-drill holes. See also:drift indicator
Scot. Easiest plane of splitting in granite, Aberdeenshire.
CF:hard way
a. N. of Eng. To turn a heading or holing to one side in order to mine the
coal on the other side of a fault without altering the level course of the
heading. Fay
b. Said of a seam when the district or working place reaches a fault, or
the boundary of old workings, or any other barren part of a mine.
CTD
Tidal channel in which the ebb currents are stronger than the flood
currents. Schieferdecker
The movement of the tidal current away from shore or down a tidal stream.
Schieferdecker
Instrument for observing liquids' boiling point, esp. for determining a
mixture's strength by the temperature at which it boils. Osborne
A modified form of chisel used in drilling, in which one end of the
cutting edge is extended further from the center of the bit than the
other.
A mode of arranging diamonds set in the face of a bit in such a manner as
to have rows of diamonds forming eccentric circles so that the path cut by
each diamond slightly overlaps that of the adjacent stones.
CF:concentric pattern
A tetragonal mineral, Pb6 As2 O7 Cl4 .
Wedge-shaped glass cell used in absorption spectrography. Pryor, 3
A delay pattern that causes the true burden, at the time of detonation, to
be formed at an oblique angle from the original free face.
A graphic recording of various sonic devices that shows ocean bottom
profiles and delineates the bedding planes and dissimilar rock contacts to
a depth of 1,500 ft (457 m) into the sediments. Mero
In oceanography, a sounding apparatus using echo delay, for determining
automatically the depth of sea beneath a ship. CTD
A monoclinic mineral, Na3 (Mg,Fe)4 AlSi8 O22
(OH)2 ; amphibole group with Mg/(Mg + Fe2+ ) = 0.5 to 1.0
and Fe3+ /(Fe3+ + Al) = 0 to 0.5; fibrous; in nepheline
syenites; an asbestos mineral.