monoclinaladj.n.

1843 W. B. & H. D. Rogers in Rep. 1st, 2nd & 3rd Meetings Assoc. Amer. Geologists & Naturalists 485 While the phrases, anticlinal dip, and synclinal dip, sufficiently express the directions of the beds, due to concave and convex flexures, we propose the term monoclinal, to signify a sameness in the direction of the dip, and shall term a mountain or valley, in which such sameness prevails, a monoclinal mountain, or monoclinal valley.

1858 H. D. Rogers Geol. Pennsylvania I. 10 The ridges..are of three orders... In geological language they are of anticlinal, synclinal, and monoclinal structure.

1875 J. W. Powell Explor. Colorado River (Smithsonian Inst.) xi. 160 Monoclinal valleys..run in the direction of the strike between the axes of the fold—one side of the valley formed of the summits of the beds, the other composed of the cut edges of the formation.

1876 D. Page Adv. Text-bk. Geol. (ed. 6) iv. 83 The strata of a district, though lying at different angles, may all slope in the same way, and in such a case they are said to be monoclinal or dipping in one main direction.

1930 Compt. Rend. 15th Internat. Geol. Congr. 1929 II. vi. 361 I shall consider only four major types of blocks included between bounding faults: 1. Tilted or monoclinal blocks; [etc.].

1942 O. D. von Engeln Geomorphol. xv. 327 Monoclinal ridges, alternating with monoclinal valleys, appear where a series of resistant and weak beds all dip in the same direction.

1957 G. E. Hutchinson Treat. Limnol. I. i. 111 The channel containing Lenore Lake lies in a zone of fractured basalt on a monoclinal slope.

1994 Bull. Geol. Soc. Amer. 106 351 Inflated pahoehoe sheet flows have a distinctive horizontal upper surface..and are bounded by steep monoclinal uplifts.

1874 J. W. Powell Rep. Explor. 1873 Colorado & Tributaries (Smithsonian Inst.) 17 The grand fold of the Uintah Mountains is greatly complicated by a series of transverse and oblique minor folds, some of which are anticlinal, others monoclinal.

1880 C. E. Dutton Rep. Geol. High Plateaus Utah ii. 25 The great structural features of the High Plateaus are the faults and monoclinal flexures.

1940 E. S. Hills Outl. Struct. Geol. v. 111 An individual normal fault may pass either laterally or vertically into a monoclinal flexure.

1969 J. Bundred Basic Geol. for Engineers iv. 115 A monoclinal fold..has basically a single undulation.

1992 Geol. Mag. 129 537/2 Particular attention was focused on a major monoclinal fold at the Acadian front.

1880 C. E. Dutton Rep. Geol. High Plateaus Utah ii. 26 So close is the homology that we are justified in calling a monoclinal in some of its aspects a modified fault. The only difference for structural purposes is that in the case of a typical fault of the simplest form the shearing is along one plane, while in the monoclinal the shearing lies between two planes.

1886 T. M. Reade Origin of Mountain Ranges xx. 250 The Water-Pocket flexure, one of the grandest monoclinals of the west.

1914 J. Park Text-bk. Geol. ix. 140 In sharply bent monoclinals, the strata in the middle limb are generally drawn out, compressed, or deformed.

1916 Bull. Geol. Soc. Amer. 27 92 I welcome the suggestion of the term homocline. The need of a term for this structure has long been felt in the United States Geological Survey, where confusion has been avoided in editing by using monoclinal for the homocline as distinct from monocline or monoclinal fold.