be present. Also of quartz if less than 5%. Quartz-free granite. Name from Syene (Aswan), where it was later renamed "Aswan red granite".synclinesynklinalaA fold in which the layered rock usually dips toward an axis.tabular shapetabulkovity tvarTable-like shape of minerals in a rock (e.g. feldspars). Two of three crystallographic axes are elongated, one is short.A fold in which the layered rock usually dips toward an axis.talcmastekThe softest mineral formed by metamorphic processes. It is the first member of Moh's scale.tectonic forcestektonicke silyForces generated from within the earth that result in uplift, movement, or deformation of part of the earth's crust.tension faulttahovy zlomFault in the earth's crust created by tensional forces.tensional stresstahove napitiA force that tends to elongate or pull apart a body.terminuseelo ledovceThe lower edge of a glacier.terrigenous sedimentsuchozemsky sedimentLand-derived sediment that has found its way to the sea floor.TertiarytoetihoryOlder period of Cenozoic (from 1.6 to 66.4 mil. of years ago).texturestrukturaMacroscopically and microscopically distinguishable characteristics (size of particles, shape of particles, state of crystallization) of a rock.thrust faultnasunutiA reverse fault in which the dip of the fault plane is at a low angle to horizontal.tilltillUnsorted and unlayered rock debris carried by a glacier.tillitetilitLithified till.tourmalineturmalinBlack, pink, blue, green or brown mineral with vitreous luster. Hardness is from 7 to 7.5. It forms slender crystals with triangular cross-sections and striated sides.trachytetrachytFelsic volcanic rock composed mostly of K-feldspars, acidic plagioclases, biotite and hornblende.transform boundarytransformni rozhraniBoundary between two plates that are sliding past each other.translucentprusvitnyTerm for a substance which transmits light, but if you place this substance over an image on paper you will not see it.transparentpruhlednyTerm for a substance which transmits light and if place this substance over an image on paper you will see it.transportationpoenos (transport)The movement of eroded particles by agents such as rivers, waves, glaciers, or wind.travertinetravertinA porous deposit of calcite that often precipitates around springs that contain high amount of CaCO3.TriassictriasThe oldest period in Mesozoic (from 208 to 245 mil. of years ago).tsunamitsunamiHuge ocean wave produced by diplacement of the sea floor; also called seismic sea wave.tufftufA rock formed from fine-grained pyroclastic particles (ash and dust).turbidity currentturbiditni proudA flowing mass of sediment-laden water that is heavier than clear water and therefore flows downslope along the bottom of the sea or a lake.U-shaped valleyudoli tvaru UCharacteristic cross-profile of a valley carved by glacial erosion.ultrabasic rocksultrabazicke horninyType of igneous rocks with small amount of silica (<44%) composed mostly of basic plagioclases, pyroxenes and amhiboles.ultramafic rocksultramaficke horninyRocks composed entirely or almost of ferromagnesian minerals (Colour index >90).unconfined aquifervolna zvodeoA partially filled aquifer exposed to the land surface and marked by a rising and falling water table.unsaturated zonenenasycena zonaA subsurface zone in which rock openings are filled partly with air and partly with water; above the saturated zone.upper mantlesvrchni plas?One of the inner shells of the earth.valley glacierA glacier confined to a valley. The ice flows from a higher to a lower elevation.varvevarvaTwo thin layers of sediment, one dark and other light in color, representing one year's deposition in a lake.ventifacthranecBoulder, cobble, or pebble with flat surfaces caused by the abrasion of wind-blown sand.viscosityviskozitaResistance to flow.vitreous