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Hondita Formation
The Hondita Formation ( es, Formación Hondita, Ksh) is a List of fossiliferous stratigraphic units in Colombia, fossiliferous formation (geology), geological formation of the Upper Magdalena Valley (VSM) and surrounding Cordillera Central (Colombia), Central and Cordillera Oriental (Colombia), Eastern Ranges of the Colombian Andes, extending from Cundinamarca Department, Cundinamarca in the north to Huila Department, Huila and easternmost Tolima Department, Tolima in the south. The lowermost unit of the Güagüaquí Group, a sequence of sandstone, sandy limestones and shales, dates to the Late Cretaceous period; Turonian epoch, and has a maximum thickness of . Fossils of ''Yaguarasaurus, Yaguarasaurus columbianus'', said to be found in the time-equivalent La Frontera Formation (listed as "La Frontera Member"), were actually recovered from the Hondita Formation as the stratigraphic unit present in the Quebradas El Ocal and Itaibe, Huila. Etymology The formation was named in 1966 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turonian
The Turonian is, in the ICS' geologic timescale, the second age in the Late Cretaceous Epoch, or a stage in the Upper Cretaceous Series. It spans the time between 93.9 ± 0.8 Ma and 89.8 ± 1 Ma (million years ago). The Turonian is preceded by the Cenomanian Stage and underlies the Coniacian Stage. At the beginning of the Turonian an oceanic anoxic event (OAE 2) took place, also referred to as the Cenomanian-Turonian boundary event or the "Bonarelli Event". Stratigraphic definition The Turonian (French: ''Turonien'') was defined by the French paleontologist Alcide d'Orbigny (1802–1857) in 1842. Orbigny named it after the French city of Tours in the region of Touraine (department Indre-et-Loire), which is the original type locality. The base of the Turonian Stage is defined as the place where the ammonite species '' Watinoceras devonense'' first appears in the stratigraphic column. The official reference profile (the GSSP) for the base of the Turonian is located in the Roc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |