Outcrops of the Paja Formation near Villa de Leyva
The Paja Formation (Spanish: Formación Paja, K1p, Kip, Kimp, b3b6p) is an Early Cretaceous geologic formation of central Colombia. The formation extends across the northern part of the Altiplano Cundiboyacense, the Western Colombian emerald belt and surrounding areas of the Eastern Ranges of the Colombian Andes. In the subsurface, the formation is found in the Middle Magdalena Valley to the west. The Paja Formation stretches across four departments, from north to south the southernmost Bolívar Department, in Santander, Boyacá and the northern part of Cundinamarca. Well known fossiliferous outcrops of the formation occur near Villa de Leyva, also written as Villa de Leiva, and neighboring Sáchica.
The formation was named after Quebrada La Paja in Betulia, Santander, and stretches across 450 kilometres (280 mi) from northeast to southwest. The Paja Formation overlies the Ritoque and Rosablanca Formations and is overlain by the San Gil Group and the Simití and Tablazo Formations and dates from the late Hauterivian to late Aptian. The Paja Formation comprises mudstones, shales and nodules of sandstones and limestones, deposited in an anoxic environment, in the warm and shallow sea that covered large parts of the present Colombian territory during the Cretaceous.
Initially considered to host Colombian emeralds, the emerald-bearing part was redefined as a separate formation; the Muzo Formation. The Paja Formation Lagerstätte[1] is famous for its vertebrate fossils and is the richest Mesozoic fossiliferous formation of Colombia. Several marine reptile fossils of plesiosaurs, pliosaurs, ichthyosauras and turtles have been described from the formation and it hosts the only dinosaur fossils described in the country to date; Padillasaurus. The formation also has provided many ammonites, fossil flora, decapods and the fossil shark Protolamna ricaurtei.
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The PajaFormation (Spanish: Formación Paja, K1p, Kip, Kimp, b3b6p) is an Early Cretaceous geologic formation of central Colombia. The formation extends...
up paja in Wiktionary, the free dictionary. Paja may refer to: Paja, Iran, a village in Sari County Paja (given name), a Serbian masculine name Paja (surname)...
shastasaurus between 2011 and 2013) whose remains were found in the Pardonet Formation of British Columbia by Elizabeth Nicholls, has been estimated to be as...
genus of brachauchenine pliosaurid known from the Barremian of the PajaFormation, Altiplano Cundiboyacense in the Colombian Eastern Ranges of the Andes...
Acanthoptychoceras is an extinct genus of ammonites belonging to the family Ancyloceratidae. Acanthoptychoceras spinatocostatum Manolov, 1962 Fossils of...
Phylloceras is an extinct genus of ammonoid cephalopods belonging to the family Phylloceratidae. These nektonic carnivores lived from Early Jurassic (Hettangian...
Pseudocrioceras is an extinct genus of ammonites. The species Pseudocrioceras anthulai has been found in strata from the Barremian - Aptian age of Chipatá...
Teredolites is an ichnogenus of trace fossil, characterized by borings in substrates such as wood or amber. Club-shaped structures rimming mid-Cretaceous...
Ancyloceras is an extinct genus of heteromorph ammonites found throughout the world during the Lower Cretaceous, from the Lower Barremian epoch until the...
were recovered from Villa de Leyva in Colombia. The location is within PajaFormation, which is already dated to belong to Lower Cretaceous, i.e., more than...
survived until Early Jurassic) is described from the Hettangian Blue Lias Formation (south Wales, United Kingdom) by Martin et al. (2015). A study on the...
Heinzia is an extinct ammonoid cephalopod genus belonging to the family Pulchelliidae. They lived during the Cretaceous, in the Barremian age. Fossils...
85 m (7.3–9.4 ft). A series of neck vertebrae from the Kimmeridge Clay Formation indicate a pliosaur, probably Pliosaurus, that may have been up to 14...
separate genus. The site where Monquirasaurus was discovered is the PajaFormation, that was once an environment containing a vast diversity of marine...
"Considerations on a Brachauchenius skeleton (Pliosauroidea) from the lower PajaFormation (late Barremian) of Villa de Leyva area (Colombia)". Mitteilungen aus...
specimen, nicknamed "El Fósil" and dating from the Upper Aptian of the PajaFormation, was first provisionally referred to the genus Kronosaurus two years...
Apesteguía, Sebastián (2007). "The sauropod diversity of the La Amarga Formation (Barremian), Neuquén (Argentina)". Gondwana Research. 12 (4): 533–546...
which the same formation is exposed. Such sites may have separate entries if they are considered to be more notable than the formation as a whole. In...
ecological network of the marine Mesozoic fauna from the Lower Cretaceous PajaFormation (Colombia), who report that the largest marine reptile predators from...
rock formationsPajaFormation, Kronosaurus and Platypterygius Lagerstätte in Colombia Sierra Madre Formation, contemporaneous fossiliferous formation of...
The richest formations are the Devonian Cuche and Floresta Formations, the Cretaceous PajaFormation, the Paleocene Cerrejón Formation and the Miocene...
Considerations on a Brachauchenius skeleton (Pliosauroidea) from the lower PajaFormation (late Barremian) of Villa de Leyva area (Colombia). Fossil Record -...
sexual dimorphism. The first Callawayasaurus remains were found in the PajaFormation near Leiva, Boyaca Colombia. The specific name for the type, "columbiensis"...
(Kronosaurus boyacensis (El Fósil), Muiscasaurus, with four nostrils) in the PajaFormation of Villa de Leyva. During the Late Eocene-Early Oligocene (35-30 Mya)...
mostly in the Segment C of the Arcillolitas Abigarradas Member of the PajaFormation, with kaolinitic argillite corresponding to an intertidal marine environment...
(230 and 360 ft). The Ritoque Formation overlies the Rosablanca and Arcabuco Formations and is overlain by the PajaFormation. The age has been estimated...
Asia, North America and South America; Argentina, Chile and Colombia (PajaFormation). Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved...
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