calcareous rock

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Related to calcareous rock: carbonaceous rock

calcareous rock:

see limestonelimestone,
sedimentary rock wholly or in large part composed of calcium carbonate. It is ordinarily white but may be colored by impurities, iron oxide making it brown, yellow, or red and carbon making it blue, black, or gray. The texture varies from coarse to fine.
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; marblemarble,
metamorphic rock composed wholly or in large part of calcite or dolomite crystals, the crystalline texture being the result of metamorphism of limestone by heat and pressure.
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References in periodicals archive ?
It predominately occurs on calcareous rocks but occasionally inhabits siliceous substrates.
The drilling has confirmed the presence of significant thickness' (260 feet to 555 feet) of interbedded calcareous rocks including shales, siltstones and limestones which would make ideal host rocks for disseminated mineralization.
At Red Rock, the target is for a high-grade Pipeline-Cortez Hills type deposit in calcareous rocks of the lower plate of the Roberts Mountains thrust fault.
Calcareous soils have high levels of calcium and magnesium carbonates formed largely by the weathering of calcareous rocks and fossil shell beds.
For this, the pulling head was equipped with a special ploughshare to dislodge and displace any calcareous rocks and to carry out pre-trenching operations.
The aureole is larger in the north and east margins (up to 75 m) where metasedimentary calcareous rocks were metamorphosed to diopside-plagioclase-calcite-garnet-quartz hornfels (Lookwood, 1965).