The trough-shaped arrangement of the beds at s is called a synclinal curve, or simply a syncline; the arched strata at a forming, on the contrary, an anticlinal curve or anticline.
"Geology"
James Geikie
The next great synclinal, adjoining the Valley of Ossau, is the Valley of Lavedan, and at its head in the mountains lies Cauterets, our next point of attack.
"A Midsummer Drive Through The Pyrenees"
Edwin Asa Dix
synclinal Strata forming Ridges.
"The Student's Elements of Geology"
Sir Charles Lyell