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vol.38 issue3PETROGRAPHY AND CARTOGRAPHY OF CONTACT AUREOLE OF THE MARIQUITA GRANODIORITE (TOLIMA DEPARTMENT, COLOMBIAN CENTRAL CORDILLERA)SEQUENTIAL ANALYSIS AND SEISMICSTRATIGRAPHIC OF SOUTH WEST IN THE LLANOS ORIENTALES BASIN (COLOMBIA) author indexsubject indexarticles search
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Boletin de Geología

Print version ISSN 0120-0283

Abstract

PATARROYO, Pedro. AMMONITES AND OTHER MACROFOSSILS FROM THE LECTOSTRATOTYPE OF LA FRONTERA FORMATION, LOWER - MIDDLE TURONIAN (UPPER CRETACEOUS) IN SAN FRANCISCO, CUNDINAMARCA (COLOMBIA). bol.geol. [online]. 2016, vol.38, n.3, pp.41-54. ISSN 0120-0283.  http://dx.doi.org/10.18273/revbol.v38n3-2016003.

A succession of about 109 m thick of the La Frontera Formation lectostratotype (Colombia) is described as well as the fossils Wrightoceras munieri (Pervinquière, 1907), Vascoceras cf. constrictum (Renz and Álvarez, 1979), V. cf. venezolanum Renz, 1982, Kamerunoceras sp., K. cf. turoniense (d'Orbigny, 1850), Hoplitoides cf. lagiraldae Etayo-Serna, 1979, Codazziceras ospinae (Karsten, 1858), Coilopoceras cf. newelli (Benavides-Cáceres, 1956); bivalves: Anomia colombiana Villamil, 1996, and inoceramids; and decapods and plants (woods). These fossils from La Frontera Formation indicate a lower - middle Turonian interval. It could not be confirmed the presence of uppermost Cenomanian deposits in the lower part of the La Frontera Formation.

Keywords : La Frontera Formation; Lectostratotype; Ammonites; Turonian; San Francisco-Cundinamarca; Colombia.

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