The process of pediment formation.
A narrow, flat, rock-floored tongue extending upslope from the main
pediment and penetrating a mountain sufficiently to meet another pediment
slope extending into the mountain from the other side.
A crystal form consisting of a single crystal face.
Broad, rock-cut, thinly alluviated surface formed by the coalescence of
adjacent pediments and desert domes.
The actual possession of a piece of mineral land to the extent needed to
give the locator room to work and to prevent probable breaches of the
peace, but not necessarily to the extent of a mining claim.
Soil enriched in calcium carbonate, accumulating in regions of low
temperature, low rainfall, and prairie vegetation. CF:pedalfer
The formation of soil from parent material.
Synonymous with geochemical soil survey. Hawkes, 1
See:soil horizon
The science that treats soils, their origin, character, and utilization.
AGI
A pocket-size instrument that registers the number of steps taken by the
person carrying it. AGI
The part of the Earth in which soil-forming processes occur.
a. One of a set of blades that picks up and channels water moved outward
by the impeller of a centrifugal pump. Nichols, 1
b. An iron implement with a flattened end and ring handle, which is used
by a baller in placing blooms, ingots, etc., in a reheating furnace.
Standard, 2
c. See:calk
High explosive; used in mines. Bennett
a. A surveyor's mark.
b. To mark out a miner's claim at the four corners by pegs bearing the
claimant's name. Sometimes used as "peg out." Webster 3rd; Fay
The adjustment of a spirit-leveling instrument of the dumpy-level type in
which the line of collimation is made parallel with the axis of the spirit
level by means of two stable marks (pegs) the length of one instrument
sight apart. AGI
An abrupt change or sharp bend in the course of a borehole. Also called
dogleg. Long
An exceptionally coarse-grained igneous rock, with interlocking crystals,
usually found as irregular dikes, lenses, or veins, esp. at the margins of
batholiths. Most grains are 1 cm or more in diameter. Although pegmatites
having gross compositions similar to other rock types are known, their
composition is generally that of granite; the composition may be simple or
complex and may include rare minerals rich in such elements as lithium,
boron, fluorine, niobium, tantalum, uranium, and rare earths. Pegmatites
represent the last and most hydrous portion of a magma to crystallize and
hence contain high concentrations of minerals present only in trace
amounts in granitic rocks. Adj: pegmatitic. Syn:giant granite
CF:symplectite
a. Said of the texture of an exceptionally coarsely crystalline igneous
rock. AGI
b. Occurring in, pertaining to, or composed of pegmatite.
Syn:pegmatoid
a. A final stage in the normal sequence of crystallization of a magma at
which the residual fluid is sufficiently enriched in volatile materials to
permit the formation of coarse-grained rocks (pegmatite) more or less
equivalent in composition to the parent rock. CF:orthomagmatic stage
AGI
b. The late stages of magma crystallization in S-type, 2-mica granites.
The process of formation of, introduction of, or replacement by pegmatite.