| 单词 | to trap up or down | 
| 释义 | > as lemmasto trap up or down    to trap up or down: to be found at a higher or lower level after dislocation by a dike or fault: see quots. ΘΚΠ the world > the earth > minerals > mineral deposits > features of stratum or vein > 			[verb (intransitive)]		 > be dislocated to trap up1719 1719    J. Strachey in  Philos. Trans. 1717–19 		(Royal Soc.)	 30 969  				They observe, as they work to the South West, when they meet with a Ridg it Causeth the Coal to trap up, that is..they find it over their heads, when they are thro' the Ridg: but..when they work thro' a ridg to the North East, they say it traps down, that is, they find it under their feet. < as lemmas | 
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