See:hiddenite; spodumene.
See:lepidolite
a. A syn. of lithologic, as in lithic unit. AGI
b. Said of a medium-grained sedimentary rock, and of a pyroclastic
deposit, containing abundant fragments of previously formed rocks; also
said of such fragments. AGI
c. Pertaining to or made of stone; e.g., lithic artifacts or lithic
architecture. AGI
a. A sandstone containing abundant quartz, chert, and quartzite, less than
10% argillaceous matrix, and more than 10% feldspar, and characterized by
an abundance of unstable materials in which the fine-grained rock
fragments exceed feldspar grains. The rock is roughly equivalent to
subgraywacke. AGI
b. See:lithic sandstone
A graywacke characterized by abundant unstable materials; specif. a
sandstone containing a variable amount (generally less than 75%) of quartz
and chert and 15% to 75% detrital-clay matrix, and having rock fragments
(primarily of sedimentary or low-rank metamorphic origin) in greater
abundance than feldspar grains (chiefly sodic plagioclase, indicating a
plutonic provenance). AGI
A sandstone containing rock fragments in greater abundance than feldspar
grains. Syn:lithic arenite
An indurated deposit of volcanic ash in which the fragments are composed
of previously formed rocks; e.g., accidental particles of sedimentary
rock, accessory pieces of earlier lavas in the same cone, or small bits of
new lava (essential ejecta) that first solidify in the vent and are then
blown out. CF:crystal tuff
Alternate spelling of litidionite. See:litidionite
See:lithification
a. A compositional change in a coal seam from coal to bituminous shale or
other rock; the lateral termination of a coal seam due to a gradual
increase in impurities. AGI
b. The conversion of a newly deposited, unconsolidated sediment into a
coherent, solid rock, involving processes such as cementation, compaction,
desiccation, and crystallization. It may occur concurrent with, soon
after, or long after deposition. AGI
c. A term sometimes applied to the solidification of a molten lava to form
an igneous rock. See also:consolidation; induration.
Syn:lithifaction
See:lepidolite
An orthorhombic mineral, 4[LiMnPO4 ] ; forms a series with
triphylite; in granite pegmatites; an ore of lithium.
A hexagonal or monoclinic mineral, (Al,Li)MnO2 (OH)2 ;
powdery; black; occurs with other supergene manganese oxide minerals.
An orthorhombic mineral, Li3 PO4 ; in white to colorless
masses in pegmatite; Kola Peninsula, Russia.
A soft, silvery-white metallic element of the alkali group, the lightest
of all metals. Symbol, Li. Does not occur free in nature; is found
combined in small amounts in nearly all igneous rocks and in the waters of
many mineral springs. Lepidolite, spodumene, petalite, and amblygonite are
the more important minerals containing it. The metal is corrosive and
requires special handling. Used as an alloying agent, in the synthesis of
organic compounds, and for nuclear applications.
Handbook of Chemistry and Physics, 3
LiBSiO4 . Used in low-temperature enamels and as a component of
high-temperature, corrosion-resistant coatings. Lee
See:lepidolite
LiNbO3 ; a ferroelectric compound having the ilmenite structure and
of potential interest as an electroceramic. Dodd
LiTaO3 ; a ferroelectric compound of potential value as a special
electroceramic. The Curie temperature is above 350 degrees C. Dodd
A body of intrusive, pervasively deformed, or highly metamorphosed rock,
generally nontabular and lacking primary depositional structures, and
characterized by lithic homogeneity. It is mappable at the surface and
traceable in the subsurface. For cartographic and hierarchical purposes,
it is comparable to a formation. The name of a lithodeme combines a
geographic term with a lithic or descriptive term, e.g., Duluth Gabbro.
CF:suite
The rock record of any sedimentary environment, including both physical
and organic characters. It is a mappable subdivision of a designated
stratigraphic unit, distinguished from adjacent subdivisions on the basis
of lithology. See also:facies