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Landen Group : ウィキペディア英語版 | Landen Group The Landen Group is a lithostratigraphic unit (a "group" of rock strata) in the Belgian subsurface. The group consists of two formations of Thanetian (late Paleocene) to Ypresian (early Eocene) age. The Landen Group is named after the town of Landen in Flemish Brabant. ==Subdivision== The Landen Group is subdivided into two formations: * The Hannut Formation, an alternation of marine clays, sands and limestones; * The Tienen Formation, a lagoonal-continental alternation of clay, sand and lignite. This formation is known for its fossils. Both formations can be found in the subsurface of all northern Belgium. They crop out in the province of Hainaut.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Landen Group」の詳細全文を読む
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