| 释义 |
surficial, a. Geol.|səˈfɪʃəl|
[f. surface n., after superficial.]
Of or pertaining to the surface of the earth. Cf. superficial a. 1 a.
1892J. D. Dana in Amer. Jrnl. Sci. CXLIV. 166 The outflow retains a thickness of 250 feet quite to its extreme western limit, which it could not have done if it had been a subaerial, or, using a much needed new word, a surficial flow. 1926[see hypabyssal a.]. 1981Costa & Baker Surficial Geol. ii. 25/2 Both surficial and bedrock geologic maps can be used to identify and classify materials, hazards, and resources.
Hence surˈficially adv., on the surface (esp. of the earth).
1895J. D. Dana Man. Geol. (ed. 4) iv. 806 The trap was poured out surficially from fissures along the eastern margin of the area. 1918[see creep v. 10]. 1944C. Palache et al. Dana's Syst. Min. (ed. 7) I. 799 The crystals..are often surficially bounded by a yellow or brown alteration shell. 1971Nature 2 July 41/1 In the theory of plate tectonics convergent plate junctures are the loci of orogeny, marked surficially by arc-trench systems. |