A magnetic-field balance instrument much less commonly used than the
vertical type. It is quite similar to it in construction except that the
magnet points approx. vertically instead of horizontally. Dobrin
A machine, making holes from 2 to 6 in (5.08 to 15.24 cm) in diameter,
used for drilling overburden at opencut coal mines. Bits are of the auger
or winged types. Lewis
The circular horizontal plate of a theodolite, accurately divided so that
horizontal angles can be precisely measured. Hammond
See:horizontal drive
See:drag cut
The amount, expressed in feet or degrees, a borehole has digressed
horizontally from the intended target. Long
See:horizontal slip
a. A term used by Tolman to designate strike slip. AGI
b. The distance two formerly adjacent points moved horizontally.
c. See:strike slip
An opening with a small inclination (about 2 to 4 mm for 1 m in length) in
the direction toward the shaft for draining the water and to facilitate
hauling of the full cars to the shaft. Syn:horizontal crosscut
Stoces
A fault in the Earth's crust with no vertical displacement.
Webster 3rd
a. The intensity of the horizontal component of the magnetic field in the
plane of the magnetic meridian. Hy
b. The horizontal component of the vector magnetic-field intensity; it is
one of the magnetic elements, and is symbolized by H.
CF:vertical intensity
A pendulum whose mass is constrained to move horizontally.
Schieferdecker
See:macrodome
See:horadiam
Shaking screens with the plates supported in an essentially horizontal
position that have been developed to obtain the advantages of low head
room requirement. Mitchell
In faulting, the distance between the two parts of a disrupted unit (e.g.,
bed, vein, or dike), measured in any specified horizontal direction.
CF:vertical separation
In a fault, the horizontal component of the net slip. CF:vertical slip
Syn:horizontal dip slip
A mechanism in which the takeup or movable pulley travels in an approx.
horizontal plane. NEMA, 2
The heave of a fault. Hess