contain dissolved gases as well as some solid minerals.magma chambermagmaticky krbHuge body of magma situated beneath the surface where magma is accumulated.magnitudemagnitudo zemetreseniA measure of the energy released during an earthquake.mantlezemsky plastA thick shell of rock that separates the earth's crust above from the core below.marblemramorA fine- or coarse-grained metamorphic rock composed of interlocking calcite (or dolomite) crystals.marlslinClay with high amount of CaCO3 (25-75%).marl slateslinita bridliceClayshale with high amount of CaCO3 (25-75%).marliteslinovecPartly lithificated pelitic sediment with significant amount of CaCO3 (25-75%).mass movementsvahovy pohybMovement, caused by gravity, in which bedrock, rock debris, or soil moves downslopein bulk.mass wastingsvahovy pohybEquivalent term to mass movement.massive structurevsesmerne zrnita texturaStructure without stratification, flow-banding, foliation, schistosity, etc.matrixzakladni hmotaFine-grained material found in the intergranular space between larger grains of sedimentary rocks.meandermeandrA pronounced sinuous curve along a stream's course.meander cutoffA new, shorter channel across the narrow neck of a meander.medial morainestredni morenaA single long ridge of till on a glacier, formed by adjacent lateral moraines joining and being carried downglacier.medium-grained rockstredne zrnita horninaRock in which most of the grains are from 1 to 2 mm in size.mechanical weatheringmechanicke zvetravaniThe physical disintegration of rock into smaller pieces.melaphyremelafyrVolcanic rock, formerly porous Mesozoic basalt where pores were secondary filled with other minerals. Its typical structure is amygdaloidal.mesatabulova horaA broad, flat-topped hill bounded by cliffs and capped with a resistant rock layer.mesh structureokata texturaStructure of some metamorphic rocks composed of ellipsoidal mineral grains.MesozoicmesozoickyGeological era that followed the Paleozoic Era and preceded the Cenozoic Era (from 225 to 65 mil. of years ago).metallic lusterkovovy leskLuster giving a substance the appearance of being made of metal.metamorphic rocksmetamorfovane horninyRocks produced by metamorphism.metamorphismmetamorfozaThe transformation of preexisting rock into structurally or mineralogically distinct new rock as a result of high temperature, high pressure, or both, but without the rock melting process.metaquarcitemetakvarcitMetamorphic rock composed mostly of quartz with micas on foliation planes.metaquartzitemetakvarcitA rock composed of sand-sized grains of quartz that have been welded together during metamorphism.micasslidyGroup of minerals belonging to sheet-silicates with variable size of grains and colour. Significant properties are: hardness 2.5, perfect cleavage, glassy to pearl luster and elasticity of scales.mid-oceanic ridgestoedooceansky hobetA giant mountain range that lies under the ocean and extends around the world.migmatitemigmatitMixed igneous and metamorphic rockwith typical migmatitic structures.mineralmineralA naturally occuring, inorganic, homogenous, crystalline or amorphous mostly solid that has a definite chemical composition.mineral contentmineralni slo?eniTerm describing composition of a rock.mineral hardnesstvrdost mineraluThe relative easy or difficulty with which a smooth surface of a mineral can be scratched; commonly measured by Mohs' scale.modified Mercali scalemodifikovana Mercaliho skalaScale expressing intensities of earthquakes (judged on amount of damage done) in Roman numerals ranging from I to XII.Moh s scale of hardnessMohrova stupnice tvrdostiScale on which ten minerals are designated as standards of hardness.Mohorovieie diskontinuityMohorovieieova diskontinuitaThe boundary separating the crust from the mantle beneath it (also called Moho).monomictmonomiktniWithin the psefitic, clastic sedimentary rocks, formed from one type of fragments.montmorillonitemontmorillonitSwelling type of clay mineral. Properties see clay minerals.morainemorenaA body of till either being carried on a glacier or left behind after a glacier has receded.mudbahnoTerm loosely used for silt and clay, usually wet.mudcracksbahenni prasklinyPolygonal cracks formed in very