See:ocher
See:infusorial earth
Small chips or pieces of stone, usually marble or limestone, about 1/2 to
3/4 in (1.3 to 1.9 cm) in diameter, made by crushing and screening.
Terrazzo chips are used with portland cement in making floors, which are
smoothed down and polished after the cement has hardened. USBM, 6
a. Pertaining to the Earth. AGI
b. Pertaining to the Earth's dry land. AGI
a. A sedimentary deposit laid down on land above tidal reach, as opposed
to a marine deposit, and including sediments resulting from the activity
of glaciers, wind, rainwash, or streams; e.g., a lake deposit, or a
continental deposit. AGI
b. Strictly, a sedimentary deposit laid down on land, as opposed to one
resulting from the action of water; e.g., a glacial or eolian deposit.
AGI
c. A sedimentary deposit formed by springs or by underground water in rock
cavities. CF:terrigenous deposit
The natural magnetic field within and surrounding the Earth and the
factors affecting it. Hy
a. Fr. "green earth". Glauconite or other phyllosilicate used as artist's
pigment.
b. Collective name for various pale bluish-green earths formed by the
disintegration of minerals, principally those of the hornblende type. Also
called green earth.
Derived from the land or continent. AGI
Shallow marine sediment consisting of material eroded from the land
surface. CF:terrestrial deposit
Sediments derived from the destruction of preexisting rocks on the Earth's
surface, as distinguished, e.g., from sediments of organic or volcanic
origin. Stokes
A plastic explosive that consists of the constituents blasting
gelatin+BNT+sodium nitrate+ammonium perchlorate. The explosive has a
relatively low rate of detonation and is very insensitive, on which
account care must be taken to ensure that its initiation is extremely
powerful. Fraenkel
A belt of sea, not exceeding 12 nmi (22.2 km) in breadth, lying beyond its
land territory and internal waters and, in the case of an archipelagic
State, its archipelagic waters, in which a coastal State has sovereignty.
United Nations
An extra-strong high explosive of the nitroglycerin type.
Standard, 2
The first period of the Cenozoic Era (after the Cretaceous of the Mesozoic
Era and before the Quaternary), thought to have covered the span of time
between 65 million years and 3 to 2 million years ago. It is divided into
five epochs: the Paleocene, Eocene, Oligocene, Miocene, and Pliocene. It
was originally designated an era rather than a period; in this sense, it
may be considered to have either five periods (Paleocene, Eocene,
Oligocene, Miocene, Pliocene) or two (Paleogene and Neogene), with the
Pleistocene and Holocene included in the Neogene. AGI
The preliminary breaking down of run-of-mine ore and sometimes coal. In
metal mines, the tertiary crushing may be performed at a central point
underground. See also:primary breaker
When a particularly fine grinding of ore is needed, two and even three
ball mills may be used in a series to attain the degree of fineness. The
successive stages are referred to as primary, secondary, and tertiary
grinding. Newton, 1
The shaft that extends a mine downward from the bottom of the secondary
shaft. Spalding
Having three different valences. Syn:trivalent
a. A surface divided into squares, or figures approaching squares, by
joints or natural divisions. Fay
b. Composed of tesserae--small cubes of stone, marble, glass, or terra
cotta variously colored and arranged in artistic design: inlaid; mosaic;
as tessellated pavement. Standard, 2
In crystallography, the same as isometric. Standard, 2
a. To search for mineral deposits in an unproved area by means of
boreholes.
b. To obtain samples of soil or rock from which the physical
characteristics of the soil or rock can be determined, such as in
foundation testing.
c. An exploratory borehole.