Miller, David J.; Donovan, S. K.
Author Affiliation, Ana.
Department of Geography and Geology
Geomorhpology of the natural bridge at Riversdale, Parish of St. Catherine, Jamaica
Caribbean Journal of Science
Date of Publication
The Natural Bridge at Riversdale, parish of St. Catherine, central Jamaica, was one of the first major, noncavernous, karstic features to be documented from the Antillean region, over 170 years ago, although it has subsequently received scant scientific attention. The Natural Bridge occurs in a small gorge cut into the Eocene limestones of the Somerset and underlying Troy Formations. The bridge spans a 20-22 m section of the Rio Doro channel and is 17 m high, with a limestone bed for a roof span, and 8 m of limestone form the roof that supports a road. A pool occurs to the northeast of the bridge; the low-sinuosity gorge to the southwest (= downstream) is a box-shaped canyon littered with fallen blocks and talus of limestone, and in situ limestone beds are undercut. The Natural Bridge was apparently formed by the partial collapse of the roof of an underground river and cave system. The initial collapse most probably formed karst windows that were subsequently connected by more complete collapse to form the gorge.....