| Talus |
accumulation of loose rock fragments derived by fall of rock from a cliff |
| Tephra |
all sizes of solid igneous rock particles blown out from a volcanic vent |
| Till |
mixture of rock fragments ranging in size from clay to boulders, deposited beneath moving glacial ice or from the melting of glacial ice |
| Time Zones |
zone of given east-west(longitudinal) lines with which standard time is given |
| Tornado |
small, very intense wind vortex with extremely low air pressure in center |
| Transcurrent Fault |
a fault in which the motion of the plates is horizontal against each other |
| Tropic of Cancer |
parallel of latitude at 231/2°N |
| Tropic of Capricorn |
parallel of latitude at 231/2°S |
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