The addition of energy to a system, thereby transferring it from its
ground state to an excited state. Excitation of a nucleus, an atom, or a
molecule can result from absorption of photons or from inelastic
collisions with other particles or systems.
The minimum time for which electric current must flow in the fusehead of a
detonator to ensure its ignition. BS, 12
An area beyond and adjacent to the territorial sea, subject to the
specific legal regime established in Part V, Articles 55-75 of the United
Nations Convention on the Law of the Sea, under which the rights and
jurisdiction of the coastal State and the rights and freedoms of other
States are governed by the relevant provisions of the Convention. Abbrev.
EEZ. EEZ resources rights include both living and non-living resources of
the subsoil and superjacent water of the zone. The EEZ will not extend
beyond 200 nmi (364 km) from the baseline from which the territorial sea
is measured. CF:continental shelf
Grant of right to prospect a designated area for a limited period. Abbrev.
EPL. Pryor, 3
A mining title on which exemption from otherwise essential activity has
been granted. Pryor, 3
Exemption laws are grants of personal privileges to debtors, which may be
waived by contract or surrender or by neglect to claim before sale.
Ricketts
To peel off in concentric layers, as some rocks weather.
a. The process by which concentric scales, plates, or shells of rock, from
less than a centimeter to several meters in thickness, are successively
spalled or stripped from the bare surface of a large rock mass. It is
caused by physical or chemical forces producing differential stresses
within the rock, as by expansion of minerals as a result of near-surface
chemical weathering, or by the release of confining pressure of a once
deeply buried rock as it is brought nearer to the surface by erosion. It
often results in a rounded rock mass or dome-shaped hill.
CF:spheroidal weathering; spheroidal parting. Syn:spalling; scaling;
sheeting; sheet jointing. AGI
b. The property of some silicate minerals, e.g., vermiculite, or rocks,
e.g., perlite, to expand permanently when heated to form an irregular or
vesicular structure. CF:intumescence
A large dome-shaped form, developed in massive homogeneous coarse-grained
rocks, esp. granite, by exfoliation; well-known examples occur in Yosemite
Valley, CA. AGI
a. The streaming-forth of volcanic gases; also, the escape of gases from a
magmatic fluid. AGI
b. Any vapor or gas arising from substances or surfaces exposed to the
atmosphere.
c. Any gas or vapor formed beneath the surface of the Earth and escaping
either through a conduit or fissure, or from molten lava or a hot spring;
an emanation.
d. An exhaling or sending forth, as of steam or vapor. Something that is
exhaled or given off or that rises in the form of a gas, fumes, or steam,
for example, a foul exhalation from the marsh. Webster 3rd
In coal mining, a fan that sucks used air from a mine and thereby causes
fresh air to enter by separate entries to repeat the cycle. BCI
An auxiliary fan that exhausts air from the face of a tunnel through
ducting or piping and discharges it into the return side of the airway off
which the tunnel branches. See also:extraction ventilation;
auxiliary ventilation; suction fan. Nelson
In mining, the complete removal of ore reserves.
A system of ventilation in which the fan draws air through the workings by
suction. Opposite of forced ventilation.
See also:auxiliary ventilation
a. M.C. Stopes in 1935 used the term exinite for the constituent
represented by the exines of spores in coal. C.A. Seyler in 1932, however,
used the term with its present meaning designating the following group of
macerals--sporinite, cutinite, alginite, resinite. The macerals grouped
under the term exinite are not necessarily exines but appear to have
similar technical properties. The term liptinite was introduced by A.
Ammosov in 1956. Little information is so far available on the
technological behavior of pure exinite. By comparison and extrapolation it
has proved possible, however, to deduce that in coals with more than 35%
volatile matter exinite is the maceral group richest in volatile matter
and in hydrogen (about 80% and about 9%, respectively). In coals with 18%
to 25% volatile matter, exinite is more resilient than the vitrinite; in
coals with more than 25% volatile matter, it has even greater resilience
than micrinite. Exinite, therefore, increases the strength of bands in
which it occurs and in broken coal concentrates in particles greater than
1 mm. IHCP
b. The micropetrologic constituent, or maceral, of spore exines and
cuticular matter. See also:sporinite; cutinite. AGI
c. A coal maceral group including sporinite, cutinite, alginite, resinite,
and liptodetrinite, derived from spores, cuticular matter, resins, and
waxes. Exinite is relatively rich in hydrogen. It is a common component of
attrital coal. CF:inertinite; vitrinite. Syn:liptinite
A coal constituent similar to material derived from plant exines.
AGI
A claim corner whose position is evidenced by a monument or its
accessories as described in the field note record, or whose location can
be identified by the aid of acceptable testimony. Seelye, 2
Ì! Õj- ¨l- :D6 % DICTIONARY TERMS:exogene See:exogenetic
[\B]exogene[\N]
a. Said of processes originating at or near the surface of the Earth, such
as weathering and denudation, and of rocks, ore deposits, and landforms
that owe their origin to such processes. CF:endogenetic
exogenic; exogenous. AGI
b. Said of energy sources and objects of extraterrestrial origin, as solar
radiation, cosmic rays, meteorites, and cosmic dust. AGI
See:exogenetic
See:exogenetic
See:xenolith