Now updated for CSW19. New words, if any, and new inflections of existing words, are shown in red.
|a filled, commonly almond-shaped, vesicle in rock.
|a fine-grained volcanic rock of intermediate composition, consisting largely of PLAGIOCLASE and one or more mafic minerals.
|of or like ANDESITE, a fine-grained volcanic rock.
|any rock of such close texture that separate minerals contained within it cannot be distinguished by the naked eye.
|of igneous rocks, fine-grained.
|a fine-grained, light-coloured igneous rock.
|of or like APLITE, a fine-grained, light-coloured igneous rock.
|a rock made up chiefly of sandy grains.
|of or like ARENITE, a rock made up chiefly of sandy grains.
|a sedimentary rock formed by the cementation of sand-sized grains of feldspar and quartz.
|pertaining to ARKOSE, a type of sandstone.
|a gold-bearing pebbly conglomerate.
|a highly mafic igneous volcanic rock, typically fine-grained and dark in color.
|of or like BASALT.
|batholite batholith bathylite bathylith
|a mass of igneous rock that has risen from a great depth.
|an earthy rock consisting of hydrated alumina with variable proportions of iron oxides and other impurities.
|of or like BAUXITE, a rock composed of aluminum hydroxides and impurities in the form of silica, clay, silt, and iron hydroxides.
|general term referring to the rock underlying other unconsolidated material, i.e. soil.
|derived from shell fragments or similar organic remains.
|a rock layer consisting of a deposit of organic material such as fossils.
|a large rock.
|full of boulders.
|a collection of broken pieces of rock or ice; (verb) to attack > BRASHED, BRASHING; (adj.) forward, over-confident > BRASHER, BRASHEST.
|like BRASH > BRASHIER, BRASHIEST.
|a geological formation consisting of angular fragments of rock.
|of or like BRECCIA, a geological formation consisting of angular fragments of rock.
|of a rock, composed of angular fragments; (verb) to break a rock down into angular fragments.
|a type of variegated marble from France or Italy.
|a dark variety of SANDSTONE, much used for building purposes.
|a variety of quartz. Cf. BUHRSTONE.
|buhrstone burrstone burstone
|a cellular, flinty rock, used for mill stones.
|a composite rock of sand and gravel cemented with calcium carbonate.
|another name for TRAVERTINE, a pale limestone deposited from solution.
|a rock made of fine volcanic detritus. See also TUFA, TOPH, TOPHE.
|a general term for all consolidated pyroclastic rock. See also TUFF.
|gravel, sand, or desert debris cemented by calcium carbonate, an accumulated product of chemical weathering in a dry climate.
|a white argillaceous stone used for whitening doorsteps.
|in Ireland, a dark shaly limestone.
|an overlying rock layer.
|a spheroidal mineral grain embedded in a meteorite. [Gk. chondros a grain, grit, cartilage].
|a meteoric stone characterized by the presence of CHONDRULES.
|a rock intermediate between TRACHYTE and ANDESITE.
|lustrous, brightly coloured bands in coal.
|an individual grain or constituent of a rock.
|a rock composed of other rocks.
|a compact very fine-grained rock consisting of consolidated clay particles.
|a carbonaceous rock; (verb) to dig for coal; to transport coal.
|a calcareous nodule found in coal.
|material which accumulates at the foot of a steep slope. Pl. COLLUVIA or COLLUVIUMS.
|a coarse-grained, porous variety of clastic limestone made up chiefly of shells and shell fragments.
|a clayey limestone whose presence in the soil affords good growth for cereal crops.
|a silicious limestone favourable for cereal crops.
|a variety of DIORITE.
|a type of igneous volcanic rock.
|relating to a type of rock formed in the fourth period of the Palaeozoic era.
|rock that is, in essence, a fine-grained GABBRO.
|of or like DIABASE, a fine-grained GABBRO.
|the upward material of material through denser rock.
|a siliceous sedimentary rock formed from the accumulations of diatoms or other nanoplankton.
|a rock angle or re-entrant corner, usu. with a crack in it.
|a crystalline granular igneous rock composed of plagioclase and hornblende.
|a type of igneous rock.
|of the nature of DOLERITE; as, much lava is doleritic lava.
|a carbonate sedimentary rock, magnesian limestone.
|pertaining to DOLOMITE, a carbonate sedimentary rock.
|a stone embedded in a sedimentary deposit and believed to have got there after being released from a melting glacier.
|a crust of small projecting crystals on a rock.
|a type of igneous rock.
|relating to DUNITE, an igneous rock.
|gravel, sand, or desert debris cemented by calcium carbonate, an accumulated product of chemical weathering in a dry climate, aka CALICHE.
|a hollow oval nodule of clay ironstone.
|a crystalline rock containing red garnet.
|relating to an ELUVIUM, an accumulation of rock debris.
|to subject (soil) to ELUVIATION.
|an accumulation of rock debris. Pl. ELUVIA or ELUVIUMS.
|a kind of granite. [Welsh elfen, element].
|the rock of an elvan vein, or the elvan vein itself; an elvan course.
|of rock formed in the second epoch of the Tertiary geological period.
|a rock composed of EPIDOTE and quartz.
|the stratigraphical unit of rock strata, corresponding to a geological era.
|a boulder carried far from its origin by glacial action.
|a gabbroitic rock composed of lime-feldspar, pyroxenes and olivine.
|of or like EUCRITE, a gabbroitic rock.
|a volcanic rock with a banded structure.
|of or like EUTAXITE, a volcanic rock with a banded structure.
|a sedimentary rock formed by the evaporation of salt water e.g. halite.
|in crystalline rocks, a stratum rich in metals.
|thin-bedded shaly or micaceous sandstone. Also FAKES.
|consisting of a fine patchy mosaic of quartz and feldspar.
|a fine-grained rock, flintlike in fracture, consisting essentially of orthoclase feldspar with occasional grains of quartz.
|an irregular streaky lenticular structure developed in metamorphic rocks.
|to turn into flint.
|a great Alpine mass of Cretaceous and Lower Tertiary sandstone with shales.
|the layer of rock beneath a vein of ore.
|a vitrified sand tube produced by the striking of lightning on sand.
|a coarsely crystalline igneous rock composed of labradorite or similar plagioclase and pyroxene, often with olivine and magnetite. Pl. GABBROS.
|of or like GABBRO.
|worthless rock in which valuable metals occur.
|a flint-like rock used for lining Bessemer converters and for surfacing roads.
|a roughly spherical stone, hollow or partially hollow, containing an accumulation of mineral matter.
|relating to a GEODE.
|a rock chipped naturally that looks like an artifact.
|(Native Australian) a stone, a boulder; (verb) to make inarticulate noises.
|a foliated usu. coarse-grained metamorphic rock typically consisting of feldspar, quartz, and mica.
|of or like GNEISS.
|having the structure of GNEISS.
|decomposed rock, largely quartz impregnated with iron compounds, at the outcrop of a vein especially of metallic sulphides.
|a highly felsic igneous plutonic rock.
|of or like granite.
|to make like granite.
|resembling granite in granular appearance; as, granitoid gneiss.
|a whitish, granular rock, consisting of feldspar and quartz intimately mixed.
|any coarse-grained, usu. dark sandstone containing angular mineral and rock fragments in a fine-grained clayey matrix.
|a kind of sandstone consisting largely of grains of quartz and glauconite; esp. (G-) as forming strata in the Cretaceous System in Southern England.
|a rock composed of quartz and mica.
|a grey volcanic rock.
|a sandstone boulder of S. England, aka SARSEN.
|a type of coarse sandstone.
|fine grained porphyritic base of porphyritic rock containing phenocysts.
|of or like HAPLITE, a fine-grained, light-coloured rock.
|a distorted form of stalactite resembling a twig.
|a sandstone material used to scrape ships' decks; (verb) to scrape a deck with holystone > HOLYSTONES, HOLYSTONING, HOLYSTONED.
|a compact type of rock composed of lime silicates > HORNFELSES.
|formed or occurring beneath the surface of the earth, as opposed to EPIGENE.
|of rock, formed by cooling and consolidation of magma.
|a hard rock formed by fusion of the volcanic fragments and dust of a nuee ardente.
|a rock, typically glassy (in some cases vesicular) and/or fine grained crystalline, produced where a meteor has collided with the earth.
|a fragment of older rock caught up in an igneous rock.
|an older rock formation completely surrounded by newer strata. N.B. there is no verb INLIE*.
|an intrusive rock or mass.
|a rock like JASPER > JASPILITES.
|a hard black variety of LIGNITE that takes a brilliant polish and is used for jewellery, ornaments, etc.
|clay slate. [A Cornish miners' term].
|a very hard rock esp. sandstone.
|krans krantz kranz
|a crown of rock on a mountain-top. [Dutch krans, a wreath].
|a basaltic lunar rock.
|a concretionary limestone in India. [Hindi kankar, stone].
|a mass of igneous rock intruded between two sedimentary beds.
|a lenticular piece or mass of rock, a small lentil.
|containing the mineral LEUCITE, as, leucitic rocks.
|the lowest series of rocks of the Jurassic system > LIASES.
|a brown carbonaceous sedimentary rock with woody texture that consists of accumulated layers of partially decomposed vegetation.
|containing LIGNITE; resembling, or of the nature of, lignite; as, lignitic clay.
|a sedimentary rock composed mostly of the mineral calcite, CaCO3.
|a quartzose TRACHYTE, aka RHYOLITE.
|to petrify, convert to rock.
|the study of rocks.
|a stone so formed by nature as to appear as if cut by art.
|a lens-shaped body of igneous rock.
|any rock derived from clay or mud. Also PELITE.
|a generally dark-colored igneous rock with significant amounts of one or more ferromagnesian minerals, or to a magma with significant amounts of iron and magnesium.
|molten or partially molten rock material. Pl. MAGMAS or MAGMATA.
|of or like MAGMA, molten or partially molten rock material.
|the production of MAGMA.
|a metamorphosed limestone; (verb) to pattern like marble.
|like marble, marbled > MARBLIER, MARBLIEST.
|to convert limestone into marble.
|of or like marble. Also MARMOREAL.
|any one of several dark-colored augitic, eruptive rocks allied to BASALT.
|containing 30-60 per cent of ferromagnesian minerals.
|a type of rock containing igneous and metamorphic elements.
|ore, esp. ironstone.
|a PHANERITIC igneous rock that consists of nearly equal percentages of alkali-feldspar and PLAGIOCLASE feldspar and 20-50 percent dark minerals, typically BIOTITE and HORNBLENDE.
|rock brought back from the surface of the moon.
|a PELITE, any rock derived from clay or mud.
|a fine-grained detrital sedimentary rock made up of clay- and silt-sized particles.
|a dark, finely crystalline basic igneous rock, named for Mugeary in Skye.
|a hard, streaky, often granular rock produced by crushing.
|of or like MYLONITE, a hard, streaky, often granular rock produced by crushing.
|a sheet of rock which has moved horizontally over neighbouring strata, as a result of overthrusting or recumbent folding. [Fr. nappe, tablecloth].
|a type of rock, a gabbro with rhombic pyroxine.
|of or like NORITE, a gabbro with rhombic pyroxine.
|a dark-coloured vitreous lava or volcanic rock.
|a kind of limestone comprising small egg-like grains.
|any of the small rounded granules of which OOLITE is composed.
|of or like OOLITE.
|any of a group of basic and ultrabasic igneous rocks consisting largely of serpentine.
|a name given to various green-mottled rocks such as DIABASE and serpentine.
|of or like an OPHITE.
|a brightly coloured marble. Pl. PAVONAZZOS.
|ferrite and cementite showing distinct bands.
|relating to PEARLITE, ferrite and cementite showing distinct bands.
|a coarsely crystallized rock commonly occurring in igneous intrusions, esp. dykes, and consisting mainly of feldspar and quartz.
|any rock derived from clay or mud.
|relating to PELITE, any rock derived from clay or mud.
|a volcanic rock, formed by the cementing together of sand, scoria, cinders, etc.
|the geological study of rocks.
|a feldspathic rock used in making Chinese porcelain. [Chinese 'little white brick'].
|lens-shaped, lenticular; (of rock) characterized by the presence of lenticular inclusions.
|an intrusive mass of igneous rock situated between strata at the top of an anticline or the bottom of a syncline.
|a compact, feldspathic, igneous rock containing nephelite, hauynite, etc. Thin slabs give a ringing sound when struck. Aka CLINKSTONE.
|a dark green igneous rock, consisting largely of chrysolite, with hornblende, augite, biotite, etc.
|relating to PICRITE, a dark green igneous rock.
|a kind of clay slate, carved by the Indians into tobacco pipes.
|a mass of rock solidified under earth's surface. [Back-formation from German plutonisch].
|pertaining to or involving the formation of rocks at great depths in the earth's crust.
|a metamorphic rock having a texture characterized by large crystals set in a finer groundmass.
|a very hard, variegated rock of a purple and white colour, used in sculpture. [Gk. porphyrites, from porphyros, purple].
|a kind of cement, having the color of the Portland stone.
|pozzolan pozzolana puzzolana
|volcanic ashes from Pozzuoli, in Italy, used in the manufacture of a kind of mortar which hardens under water.
|a kind of granite or gneiss containing a silvery talcose mineral.
|a fine-grained rock.
|of or like PSAMMITE, any rock composed of sand-grains.
|a rock composed of pebbles, a conglomerate.
|of or relating to pebbles.
|of or pertaining to pumice; resembling pumice.
|a porous volcanic rock.
|a metamorphosed sandstone.
|containing, or resembling, quartz; partaking of the nature or qualities of quartz.
|any of various different kinds of stone of a hard coarse texture, which break up in flat pieces several inches thick.
|a type of red marble; (verb) to shore up, prop.
|a layer of loose rock overlaying solid rock.
|a highly felsic igneous volcanic rock, typically light in color; the rough volcanic equivalent of granite.
|relating to RHYOLITE, a highly felsic igneous volcanic rock.
|an outcrop of resistant rock, esp. one forming a cliff at the edge of a plateau.
|hemmed in by rock, rocky.
|a fall of rock.
|being without rocks.
|like a rock.
|water issuing from a rock.
|another name for OOLITE, a kind of limestone comprising small egg-like grains.
|of breccia etc, composed of coarse-grained material.
|a CLASTIC sedimentary rock that is LITHIFIED sand.
|a soft, partially decomposed rock that has remained in its original site.
|of or like a SAPROLITE.
|an ultrabasic igneous rock consisting of OLIVINE and ENSTATITE.
|a reddish variety of limestone. Pl. SCAGLIAS.
|a type of metamorphic rock consisting of a significant percentage of one or more platy minerals such as one of the micas and/or chlorites.
|of or pertaining to schist; having the structure of a schist.
|one of a set of streaks of different color or composition in igneous rock. Plural SCHLIEREN.
|one of a set of streaks of different color or composition in igneous rock. Plural SCHLIERENS.
|relating to SCHLIEREN.
|scree, loose rock debris.
|loose rock debris; a slope at the base of cliff of said debris.
|of or like shale > SHALIER, SHALIEST.
|a coarse-grained igneous rock, allied to granite.
|a ridge of mountain and craggy rocks, with a serrated or irregular outline; as, the Sierra Nevada.
|any of the compounds regarded as formed from silica and other oxides, which include many rock-forming minerals; (verb) to combine with silica.
|consisting in a noteworthy part of silica, typically quartz.
|to convert into or impregnate with silica.
|a rock formed of hardened silt.
|to roof with slate.
|like or containing slate > SLATIER, SLATIEST.
|smooth wind-polished rock.
|a soft soapy rock.
|a fine-grained igneous rock of basaltic composition.
|of or like SPILITE, a fine-grained igneous rock of basaltic composition.
|a spotted slate, formed by contact metamorphism.
|a kind of LIMESTONE, givign a fetid urinous smell when rubbed.
|relating to a STRATUM.
|a layer of sedimentary rock. Pl. STRATA or STRATUMS.
|a small columnar rock formation in limestone and other calcareous rocks that is at right angles to the bed, of irregular cross section, with striated sides.
|of or like SYENITE, a kind of igneous rock.
|a rock composed of SYLVINE and rock salt.
|of or like a SYNCLINE, a fold of rock layers that is convex downwards.
|a fold of rock layers that is convex downwards. Antonym of ANTICLINE.
|a vitreous form of basalt.
|rock detritus or debris at the base of a slope > TALUSES; the ankle bone > TALI.
|tarras terras trass
|an earthy volcanic tuff used as a hydraulic cement.
|a kind of volcanic rock.
|relating to TAXITE, a volcanic rock.
|a type of small glassy stone, thought to be a product of meteorite impact.
|pertaining to the actual structure of the crust of the earth (or of another planet or a moon), or to general changes affecting it.
|relating to a TEKTITE.
|an igneous rock consisting essentially of plagioclase and either LEUCITE or NEPHELITE, or both.
|of or like TEPHRITE, an igneous rock consisting essentially of plagioclase and either LEUCITE or NEPHELITE, or both.
|an earthy volcanic tuff used as a hydraulic cement > TERRASES.
|a holocrystalline igneous rock composed of PLAGIOCLASE, NEPHELITE and AUGITE.
|a basaltic rock rich in aluminum.
|glacial drift composed of rock fragments that range from clay to boulder size and randomly arranged without bedding.
|indurated TILL, glacial drift composed of rock fragments that range from clay to boulder size and randomly arranged without bedding.
|of or like TILL > TILLIER, TILLIEST.
|a fine-grained igneous rock composed essentially of FELDSPAR, NEPHELINE and AEGIRINE.
|a coarse-grained igneous rock.
|of or like TONALITE.
|toph tophe tufa
|a rock made of fine volcanic detritus. See also CALCTUFA.
|a shale, almost a coal, once mined for oil at Torbane Hill in Scotland.
|Lydian stone, a highly siliceous (usu black) stone or other stone for testing gold or silver by the colour of the mark each makes on it; (fig.) a criterion, a standard.
|any fine-grained volcanic rock of the alkaline series of intermediate rocks.
|of, pertaining to, or resembling, TRACHYTE, an igneous rock, usually light gray in color and breaking with a rough surface.
|any fine-grained columnar igneous rock esp. basalt.
|trappean trappose trappous
|of or pertaining to TRAP.
|of or pertaining to TRAP, a kind of rock > TRAPPIER, TRAPPIEST.
|a white concretionary form of calcium carbonate, usually hard and semicrystalline, deposited from the water of springs or streams holding lime in solution.
|pertaining to TUFA; consisting of, or resembling, tufa.
|a general term for all consolidated pyroclastic rock. Not to be confused with TUFA. See also CALCTUFF.
|a kind of DIORITE or DIABASE containing imbedded whitish spherules, which give the rock a spotted appearance.
|the nonmetalliferous mineral or rock material which accompanies the ores in a vein, as quartz, calcite, barite, fluor spar, etc.
|a stone polished by wind-blown sand.
|as in verd antique, a dark green mottled impure variety of serpentine. No —S.
|an indeterminate green decomposition product in rocks.
|vug vugg vugh
|a small unfilled cavity in a lode or in rock. [Cornish vooga].
|like a VUG or VUGG, a cavity lined with crystals > VUGGIER, VUGGIEST; VUGHIER, VUGHIEST.
|pertaining to vugs.
|an old name for a decomposed BASALT.
|a hard and compact rock.
|a rock fragment foreign to the igneous mass in which it occurs.