| 释义 |
monocline Geol.|ˈmɒnəklaɪn|
[Formed as monoclin-al; cf. anti-, iso-, syncline.]
a. A monoclinal fold.
1879Geikie in Encycl. Brit. X. 300/1 The strata are thus bent up and continue on the other side of the tilt at a higher level. Such bends are called monoclines or monoclinal folds, because they present only one fold, or one half of a fold, instead of the two which we see in an arch or trough. 1898Milne Seismol. iii. 33 The bases of monoclines are tracts where faults are frequent. 1916[see monoclinal a. and n. B. b]. 1940E. S. Hills Outl. Struct. Geol. iv. 70 A monocline is a local steepening of an otherwise uniformly dipping or horizontal series, and is composed of an anticlinal bend above, followed by a synclinal bend at a lower level... In oil-field geology, however, the term is used for formations in which the dip is more or less uniform in one direction. 1942M. P. Billings Struct. Geol. iii. 41 In plateau areas..the strata may locally assume a steeper dip... Such a fold is a monocline. The beds in a monocline may dip at angles ranging from a few degrees to ninety degrees. 1962Read & Watson Introd. Geol. I. viii. 487 In this way monoclines may be formed and may grade into zones of normal faulting.
b. = homocline.
1912E. H. C. Craig Oil-Finding v. 74 Oil may be obtained from monoclines, often in great quantity. In such cases the more gentle the dip, the better. 1925A. B. Thompson Oil-Field Exploration I. v. 186 The term ‘monocline’ is here retained in its customary oil-field phraseology as representing a series of uniformly dipping beds, irrespective of the relationship they may bear to the general structure of the district. 1951E. N. Tiratsoo Petroleum Geol. iv. 79 The monocline can be considered as virtually one limb of an anticline up which the migrating fluids pass, leaving well-marked layers of dynamically separated gas, oil and water. |