HORIZONTALITY • E-FREE TRANSLATION.COM • Definition of Horizontality

... force of vapours, and to the heavings occasioned by volcanoes); while the other rests on the operation of small powers, which produce effects almost insensibly by progressive action. Those who love to indulge in geological hypotheses must not, however, forget the horizontality so often remarked amidst gypseous and calcareous mountains, in the position of grottoes communicating with each other by passages. This almost perfect horizontality, this gentle and uniform slope, appears to be the result ...

— Equinoctial Regions of America • Alexander von Humboldt

... remarked, that all these sedimentary formations are stratified. In level countries, as might be expected, the disposition of the layers is nearly horizontal. In approaching mountainous countries, this horizontality, generally speaking, ceases; finally, on the sides of mountains, some of these layers are very much inclined; they even sometimes ...

— The American Quarterly Review, No. 17, March 1831 • Various