synclinal

[ sin-klahyn-l, sing-, sing-kli-nl ]

adjective

sloping downward from opposite directions so as to meet in a common point or line.
Geology.
- inclining upward on both sides from a median line or axis, as a downward fold of rock strata.
- pertaining to such a fold.

Origin of synclinal

1825–35; syn- + Greek klī́n(ein) to lean¹ + -al¹

Many such synclinal mountains or plateaus, separated by narrower anticlinal valleys, occur throughout the Appalachians.
North America | Israel C. Russell
The high synclinal coal-field forms the most important feature of the north of the county.
Encyclopaedia Britannica, 11th Edition, Volume 15, Slice 7 | Various
Take, for example, one of the synclinal folds in the Appalachian chain.
The Story of the Hills | H. N. Hutchinson
If an anticlinal arch be a weak structure, a synclinal arrangement of strata is quite the opposite.
Fragments of Earth Lore | James Geikie
synclinal strata therefore endure, while anticlinal strata are worn more readily away.
Fragments of Earth Lore | James Geikie

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