An obsolete form of syncline.--adj. Pertaining to a syncline.
CF:anticlinal
In geology, the central line of a syncline, toward which the beds dip from
both sides. See also:axis
A mountain whose geologic structure is that of a syncline.
CF:anticlinal mountain
A valley whose geologic structure is a syncline. CF:anticlinal valley
A fold in which the core contains the stratigraphically younger rocks; it
is generally concave upward. CF:anticline
synclinal. AGI
a. A compound syncline; a closely folded belt, the broad general structure
of which is synclinal. Also called synclinore.
b. A major syncline composed of many smaller folds.
See also:geosyncline
In bituminous coal mining, a person who works with a party of miners who
operate machines for undercutting, drilling, and loading coal into cars at
the working face and are paid on a basis of tonnage of coal mined.
DOT
a. Action of two agents, usually two chemicals, to produce an end effect
greater than or different from the sum of the effects of the two agents
acting separately.
b. Used in metallurgy with reference to reagent combinations to obtain the
maximum possible recovery of ore or metal. Nelson
A fold whose limbs close downward in strata for which the stratigraphic
sequence is unknown. CF:syncline; antiform. AGI
a. Said of a mineral deposit formed contemporaneously with, and by
essentially the same processes as, the enclosing rocks. CF:epigenetic
AGI
b. Said of a primary sedimentary structure, such as a ripple mark, formed
contemporaneously with the deposition of the sediment. AGI
A deposit formed contemporaneously with the parent rock and enclosed by
it. There are two types of syngenetic deposits, igneous and sedimentary.
Some examples are nickeliferous sulfides, nontitaniferous magnetite,
diamond, chromite, and corundum. Lewis
See:syntectonic
A mechanism by which small plagioclase crystals float into growing
phenocrysts of potassium feldspar. Also, said of the texture of a rock
showing such crystals. Etymol: Greek, to swim together. AGI
Said of a geologic process or event occurring during a period of orogenic
activity; or said of a rock or feature so formed. CF:syntectonic
AGI
An igneous intrusion emplaced during a period of orogenic activity.
AGI
An intergrowth between two mineral species in which single or multiple
unit cells coincide in size and shape, e.g., bastnaesite-synchisite.
CF:distaxy; epitaxy; topotaxy; polycrystal.
The adj. of syntexis.
A rock formed by syntexis.
Said of a geologic process or event occurring during any kind of tectonic
activity, or of a rock or feature so formed. CF:synorogenic
Syn:synkinematic
a. The formation of magma by melting of two or more rock types and
assimilation of country rock; anatexis of two or more rock types.
AGI
b. Modification of the composition of a magma by assimilation. AGI
c. Any kind of reaction between a rising body of magma and the crustal
rocks with which it comes into contact.--Adj: syntectic.
See also:anatexis
The production of a chemical compound by the union of elements or of
simpler compounds or by the degradation of a complex compound, esp. by
laboratory or industrial methods.