Название: NEW MineralS IN Caves FROM San Salvador Island, Bahama
Источник: 15th International Congress of Speleology
Место публикации: Romania
Том:
Выпуск:
Страницы: 540-540
Web/Url:
№ полки:
Добавлено: Elmaz
Ключевые слова: Minerals, Caves, San Salvador, Багамские острова, о. Сан-Сальвадор
Источник:
Реферат: The Bahamas represent carbonate banks that have been in existence since the Mesozoic Era as tectonically-stable and isostatically-subsiding platforms. The island of San Salvador, located on the eastern edge of the Bahamian platform, is home to a number of caves. The stratigraphy of the San Salvador consists of the Holocene Rice Bay Formation, a terra rosa paleosol, the trangressive-phase eolianite/subtidal/regressive-phase eolianite carbonate package of the Grotto Beach Formation, a terra rosa paleosol, and eolianites and terra rosa paleosols from several sea-level fluctuations designated as the
Owl’s Hole Formation. Today, the surficial geology is entirely Quaternary limestone, modified by karst processes. The limestones on the island are carbonate eolianites, which are relatively pure. Caves for this study fall into two categories: pit caves and flank margin caves. Pit caves form as a result of percolating meteoric water, which collects in epikarst, dissolving limestone. Flank margin caves form on the distal margins of the fresh-water lens at the location where fresh water and seawater mix.