| 释义 |
down-dip, a. and adv. Geol.
[f. down prep. + dip n.]
A. adj. Situated or occurring in a direction downwards along the dip.
1916[see up-dip a. and adv.]. 1917Bull. Geol. Soc. Amer. XXVIII. 569 Oil has collected on the down-dip side, generally where the change in rate of dip is most pronounced. 1974R. D. Grace in P. L. Moore et al. Drilling Practices Man. xiii. 329 This theory offers a possible qualitative explanation to hole deviation in slightly dipping formations; however, it does not explain the downdip drilling which occurs in steeply dipping formations. 1984Lowe & Walker Reconstructing Quaternary Environments iii. 101 Where the dip of the pebbles has been recorded, orientation measurements are taken in the down-dip direction.
B. adv. In a down-dip direction.
1972R. G. Kazmann Mod. Hydrol. (ed. 2) v. 175 The aquifer may pinch out in clay downdip. Ibid. 177 Thus, freshwater might migrate down-dip from an upland recharge area. 1979Mining Engin. XXXI. 493/1 Much of the activity in the Texas Coastal Plain involves drilling both downdip and along strike from known deposits. |