n
A light, chalky deposit of calcium carbonate formed in caverns or fissures of limestone.
n
(geology) The acidic ability of water (when it contains dissolved carbon dioxide) to dissolve calcium carbonate from rocks.
n
(Western United States) Soluble mineral matter, other than common salt, contained in soils of natural waters.
n
(petrology) a grain of rock in a carbonate rock
adj
(mineralogy) Yielding anthracite.
n
(geology) Any calcarenite that contains fossils
n
(geology) Any carbonate rock formed from the skeletons of ancient organisms
n
(geology) A limestone similar to biopelsparite
n
(geology) A bubble-like inclusion of one mineral within another.
n
The earthy residuum after the calcination of bone, consisting chiefly of calcium phosphate.
adj
(mineralogy) Of a short form.
n
calcium hydroxide, slaked lime
n
Alternative form of calc-tufa [tufa]
adj
(geology) Containing both alkali metals and alkaline earth metals
n
(geology) A form of limestone (or dolomite) composed of sand-sized grains derived from the erosion of older rocks.
adj
Consisting of, or containing, calcareous and argillaceous earths.
adj
Consisting of, or containing, both calcareous and siliceous earths.
adj
Resembling or containing calcium carbonate or limestone; chalky.
adj
(soil science) calcareous
n
Alternative form of calcarenite [(geology) A form of limestone (or dolomite) composed of sand-sized grains derived from the erosion of older rocks.]
adj
having calcium carbonate; chalky
adj
of, pertaining to, or derived from calcium or lime
n
Any plant that thrives in a soil rich in lime or chalk, but cannot tolerate acidic conditions.
adj
Yielding or containing calcium, calcium carbonate or calcite.
n
Something which calcifies; an agent of calcification.
adj
Having the form of calx, chalk or lime.
n
Any plant that does not thrive in a soil rich in lime or chalk
adj
That forms a calx when oxidized.
n
(geology) A form of limestone composed of detrital carbonate grains
n
(geology) A form of limestone that has larger than normal grains
n
A soil with a substantial secondary accumulation of lime.
n
(mineralogy) a very widely distributed crystalline form of calcium carbonate, CaCO₃, found as limestone, chalk and marble
n
A turbidite composed of calcium carbonate.
n
(inorganic chemistry) A colourless or white inorganic compound, CaCO₃, occurring as chalk, limestone, marble etc; reacts with acids to liberate carbon dioxide.
adj
Tending to erode limestone.
n
Alternative form of calctufa [calcite; calcspar]
n
(geology) A dark shaly limestone occurring in the Carboniferous limestone of Ireland.
n
(geology) Any secondary calcareous deposit, created by the action of water outside the natural cave environment. They are typically found on man made structures and mimic the shapes and forms of cave speleothems, such as stalactites, stalagmites, flowstone etc.
n
(geology) A carbonate unit immediately overlaying a glacial diamictite, found only in sediments deposited immediately after a Snowball Earth episode.
n
(geology) Synonym of calcilutite
n
(geology) A sedimentary rock / mineral formed from bat guano
adj
relating to, or composed of cinders; cindery
adj
Containing or yielding coal
adj
Alternative form of coal-bearing [Containing or yielding coal]
n
A rubbly limestone composed of ancient coral reef material, sometimes used locally in building.
n
A small node of calcite, aragonite or gypsum that forms on surfaces in caves, especially limestone caves.
n
A limestone containing cherts
adj
From which lime (calcium) has been removed
n
(geology) A sedimentary, calcareous conglomerate containing a mixture of particles; mixtite
n
(geology) A calcrete where the calcium carbonate partially or fully replaced by dolomite.
n
(geology) A sedimentary carbonate rock that contains a high percentage of the mineral dolomite.
n
Alternative spelling of aeolianite [(geology) A rock formed from dune sand, often calcareous.]
n
(geology) A secondary layered mineral deposit of calcite or other mineral, formed by water flowing down the walls and along the floor of a cave.
n
(geology) A tube-like marking found in sandstone and other strata.
n
Alternative form of girasol (“fire opal”) [A fire opal.]
n
(mineralogy) Decomposed granite.
n
A mineral consisting of hydrated calcium sulphate. When calcinated, it forms plaster of Paris.
n
A calcareous sediment composed of the remains of the tissues of Halimeda algae.
n
(inorganic chemistry) The quantity of calcium carbonate dissolved in water, usually expressed in parts per million (ppm).
adj
(geology) Modified to form a hornfels
n
A form of dust particle, found as an atmospheric aerosol, that originates in the Sahara.
n
Detrital or residual calcium carbonate, rolled and often nodular, formed in soils of semi-arid regions.
n
(geology) An area of limestone that has been eroded into furrows and fissures
n
Alternative spelling of kieselguhr [diatomaceous earth. A kind of soft rock containing the remains of diatoms; it absorbs nitroglycerine and is used to manufacture dynamite.]
n
Alternative form of kankar [Detrital or residual calcium carbonate, rolled and often nodular, formed in soils of semi-arid regions.]
n
Alternative form of laccolith [(geology) A mass of igneous or volcanic rock found within strata which forces the overlaying strata upwards and forms domes.]
n
(geology) Any sedimentary rock composed of very fine layers.
n
An abundant rock of marine and fresh-water sediments; primarily composed of calcite (CaCO₃); it occurs in a variety of forms, both crystalline and amorphous.
n
(geology) A lithic sandstone
adj
Of or relating to lye or lixivium; of the quality of alkaline salts.
n
(geology) A grey form of limestone that contains fossil shells, and reflects a fiery play of colours
n
Alternative form of lumachel [(geology) A grey form of limestone that contains fossil shells, and reflects a fiery play of colours]
n
(geology, dated) A rock composed of clayey or silty sediment.
n
(geology, uncountable) The limestone of which it is constructed.
n
(geology, speleology) A carbonate coating formed through the precipitation of calcium carbonate onto existing rock below the water surface in cave pools.
n
A siltstone that has undergone metamorphism to some degree.
n
(geology) A sedimentary limestone matrix derived from calcite mud.
n
(mineralogy) A hydrated calcium nitrate mineral that forms as an efflorescence where manure contacts concrete or limestone in a dry environment, as in stables or caverns.
n
(geology) A small calcium carbonate or iron coated grain found on the seafloor.
adj
(dated) Of, pertaining to, or produced by a combination of calcium (or lime) and oxygen
n
(geology) A large flint, typically occurring upright in chalk strata
n
(geology) A light, porous volcanic rock composed of small grains of sand etc.
adj
Of or relating to a kind of soil horizon formed when secondary calcium carbonates or other carbonates accumulate in the subsoil to the extent that the soil becomes cemented into a hardpan.
n
A concretionary grain, typically of calcium carbonate, between a microid and a macroid in size.
n
(geology) a natural glass, rich in microscopic crystallites, formed by the rapid cooling of lava or magma
n
(geology) a very finely-grained sedimentary limestone
n
(geology) A form of limestone that has the mottled appearance of breccia
n
(geology) any clastic and sedimentary rock that is pigmented with red ferric oxide
n
(geology) The mineral material left when rocks are heated so much that granite is formed.
n
A light powdery variety of calcite occurring as an efflorescence.
adj
Yielding or containing salt; saliniferous
n
(geology) A flattened concretionary nodule, usually of limestone, intersected within by cracks which are often filled with calcite, barite, or other minerals.
n
Alternative form of schist [Any of a variety of coarse-grained crystalline metamorphic rocks with a foliated structure that allows easy division into slabs or slates.]
adj
(rare) Consisting of silica and calcareous matter.
adj
yielding or bearing silica
n
(geology) a soft rock, rich in talc, also containing serpentine and either magnetite, dolomite or calcite
n
(geology) Any secondary mineral, deposited in a natural cave by the action of water.
n
(geology) A secondary mineral deposit of calcium carbonate or another mineral, in shapes similar to icicles, that hangs from the roof of a cave.
n
(geology) A secondary mineral deposit of calcium carbonate or other mineral, in shapes similar to icicles, that lies on the ground of a cave.
n
(geology) An irregular surface between strata consisting of toothlike projections; most common in limestone and dolomite.
adj
Consisting largely of the mineral talc.
adj
Composed of or resembling talc.
n
Obsolete form of trass. [(geology) A white to grey volcanic tufa, formed of decomposed trachytic cinders, sometimes used as a cement.]
n
An alginite found in sapropel and composed of large, discretely occurring colonial or thick-walled unicellular algae.
n
A porous, extrusive, igneous, volcanic rock, usually reddish in colour, used extensively in construction in Mexico.
n
(geology) A sediment deposited by tidal activity.
n
(geology) Any dark-colored, fine-grained, non-granitic igneous rock, Alternative form of trap.
n
Alternative form of travertine [(mineralogy) A light, porous form of concretionary limestone (or calcite) deposited from solution, and sometimes quarried for building.]
n
(mineralogy) A light, porous form of concretionary limestone (or calcite) deposited from solution, and sometimes quarried for building.
n
Calcareous lime deposited by precipitation from a body of water, such as a hot spring.
n
The formation of a cloud of calcium carbonate precipitate in a body of water during the summer, as a result of change in water temperature or increased photosynthetic activity by certain microscopic marine organisms.
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