synclinaladj.n.
/sɪnˈklʌɪnəl//ˈsɪŋklɪnəl/ A. adj.
1. Geology. Applied to a line or axis towards which strata dip or slope down in opposite directions; also said of the fold or bend in such strata, or of a valley, trough, or basin so formed. Opposed to anticlinal adj. and n.
ΘΚΠ
the world > the earth > structure of the earth > structural features > fold or dip > [adjective] > syncline
synclinal1833
synclinical1838
synclinorial1880
synclinorian1883
1833 C. Lyell Princ. Geol. III. 293 A series of anticlinal and synclinal lines, which form ridges and troughs running nearly parallel to each other.
1863 J. D. Dana Man. Geol. §113. 105 A synclinal valley is a valley formed by strata sloping downward from either side.
1867 R. I. Murchison Siluria (new ed.) viii. 171 The extension of the..Silurian strata..by anticlinal and synclinal folds.
1876 D. Page Adv. Text-bk. Geol. (ed. 6) xix. 376 The synclinal basins of London and Hampshire.
2. transferred and gen. Inclined or sloping towards each other, or characterized by such inclination.
ΘΚΠ
the world > space > relative position > inclination > state or quality of being convergent > [adjective]
concentrated1652
convergent1728
converging1776
corradial1825
synclinal1880
1880 B. E. Falkonberg Desert Life 320 Narrow avenues of airy palm-trees with their tops of synclinal fan-tracery.
1903 A. M. Clerke Probl. Astrophysics i. xi. 126 Synclinal forms (as the petal-shaped structures are called) emerge in both, and the branching effusions round the trapezium seem to mimic details legible in many eclipse~pictures.
B. n.
Geology. A synclinal line, fold, or depression.
ΘΚΠ
the world > the earth > structure of the earth > structural features > fold or dip > [noun] > syncline
synclinal1855
syncline1874
downwarp1903
1855 J. Phillips Man. Geol. 142 The strata rising and falling in many steep anticlinals and deep synclinals.
1874 R. W. Raymond Statistics Mines & Mining 512 The east shaft..has passed the synclinal and is now cutting through the south-dipping strata.
Derivatives
synˈclinally adv. in the form of a synclinal fold.
ΘΚΠ
the world > the earth > structure of the earth > structural features > fold or dip > [adverb] > others
synclinally1855
downdip1923
ptygmatically1928
isoclinally1936
up-dip1957
1855 J. Phillips Man. Geol. 45 The strata are synclinally and anticlinally bent.
syncline n. /ˈsɪŋklaɪn/ a synclinal fold or depression; (see also quot. 1972); cf. synform n. at syn- prefix 1.
/ˈsɪŋklaɪn/ a synclinal fold or depression; (see also quot. 1972); cf. synform n. at syn- prefix 1.ΘΚΠ
the world > the earth > structure of the earth > structural features > fold or dip > [noun] > syncline
synclinal1855
syncline1874
downwarp1903
1874 J. Geikie Great Ice Age xxi. 288 (caption) Diagrammatic view of synclines and anticlines.
1893 B. Willis in 13th Ann. Rep. U.S. Geol. Surv. 1891–2: Pt. 2 219 The two great types of folds are the syncline and the anticline. The syncline..is a depression of the strata from a flat to a basin-shaped form.
1937 Trans. Royal Soc. Edinb. 59 81 In common tectonic practice, an anticline has come to be understood as a fold with a core of previously underlying rocks, and a syncline as a fold with a core of previously overlying rocks.
1972 Gloss. Geol. (Amer. Geol. Inst.) 718/2 Syncline, a fold, the core of which contains the stratigraphically younger rocks; it is concave upward.
synˈclinical adj. = sense A. 1.
ΘΚΠ
the world > the earth > structure of the earth > structural features > fold or dip > [adjective] > syncline
synclinal1833
synclinical1838
synclinorial1880
synclinorian1883
1838 H. D. Rogers 2nd Ann. Rep. Geol. Explor. Pennsylvania 93 Synclinical axis, when the strata dip in opposite directions towards a common central imaginary line, it is called a synclinical line, or axis.
synclinore n. /ˈsɪŋklɪnɔː(r)/ see quots.
/ˈsɪŋklɪnɔː(r)/ see quots.ΘΚΠ
the world > the earth > structure of the earth > structural features > fold or dip > [noun] > synclinorium
synclinorium1880
synclinore1883
1883 Dana Text-bk. Geol. 56 (Cent. Dict.) Synclinore.
syncliˈnorial adj.
ΘΚΠ
the world > the earth > structure of the earth > structural features > fold or dip > [adjective] > syncline
synclinal1833
synclinical1838
synclinorial1880
synclinorian1883
1880 J. D. Dana Man. Geol. (ed. 3) 823 After the last mentioned synclinorial range [of mountains] was completed.
syncliˈnorian adj.
ΘΚΠ
the world > the earth > structure of the earth > structural features > fold or dip > [adjective] > syncline
synclinal1833
synclinical1838
synclinorial1880
synclinorian1883
1883 A. Winchell World-life (1889) 331 Geosynclinals are in progress beneath the sea, which will never attain synclinorian crises unless some revolution provides supplies of sediments.
synclinorium n. /sɪŋklɪˈnɔərɪəm/ (pl. synclinoria, anglicized)
/sɪŋklɪˈnɔərɪəm/ (pl. synclinoria, anglicized) ΘΚΠ
the world > the earth > structure of the earth > structural features > fold or dip > [noun] > synclinorium
synclinorium1880
synclinore1883
1880 J. D. Dana Man. Geol. (ed. 3) 821 The mountain range, begun in a geosynclinal, and ending in a catastrophe of displacement and upturning, is appropriately named a synclinorium... (The word is from the Greek for synclinal, and ὄρος, mountain).
This entry has not yet been fully updated (first published 1919; most recently modified version published online March 2019).
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adj.n.1833