The Ritoque Formation ( Spanish : Formación Ritoque , Kiri, Kirt) is a geological formation of the Altiplano Cundiboyacense , Eastern Ranges of the Colombian Andes . The formation consists of grey siltstones , limestones and fine sandstones intercalated. The formation dates to the Early Cretaceous period; Early Hauterivian epoch and varies in thickness between 70 and 110 metres (230 and 360 ft).
4-577: The formation was first defined and named by Etayo in 1968 after the vereda Ritoque of Villa de Leyva . The Ritoque Formation is characterised by a sequence of grey siltstones , limestones and sandstones with a thickness between 70 and 110 metres (230 and 360 ft). The Ritoque Formation overlies the Rosablanca and Arcabuco Formations and is overlain by the Paja Formation . The age has been estimated to be Early Hauterivian . Stratigraphically,
8-529: The Universidad Nacional de Colombia in 1963, and his PhD in paleontology from the University of California, Berkeley in 1975. In 1962, Etayo Serna published his first work about the species Codakia orbicularis and Codakia orbiculata . He has defined many geologic formations of Colombia in the 1960s and 1970s. Etayo, together with fellow paleontologist María Páramo , collaborated in describing
12-541: The first dinosaur fossil found in Colombia, Padillasaurus from the Paja Formation , close to Villa de Leyva , Boyacá . His work has been focused on the descriptions of the various ammonites found in the same formation. He also co-authored the 2016 publication about Stenorhynchosaurus munozi , found in the same formation. Etayo has published in Spanish and English. In 1975, the year Etayo received his PhD degree, he
16-606: The formation is time equivalent with the Macanal Formation . The Ritoque Formation is found, apart from its type locality near Villa de Leyva , Boyacá , found in the vicinity. Fernando Etayo Fernando Etayo Serna is a Colombian paleontologist and geologist . His contributions on the paleontology in Colombia has been mainly on the descriptions of ammonites and Etayo has helped describing many fossiliferous geologic formations of Colombia . Etayo obtained his MSc. degree in geology and geophysics from
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