Leslie Manríquez- PhD.
- PostDoc Position at Instituto Antartico Chileno
Leslie Manríquez
- PhD.
- PostDoc Position at Instituto Antartico Chileno
About
48
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Introduction
Current institution
Publications
Publications (48)
Seymour Island, located in the northeastern part of the Antarctic Peninsula, is famous for the widespread occurrence of fossils dating from the Late Cretaceous to the late Eocene. The PALEOCLIMA Project, carried out scientific expeditions in 2019–20 and 2022–23 with the aim of collecting rocks and fossils seeking information about climate changes o...
The Cretaceous/Paleogene boundary (K/Pg) event, associated with a meteorite impact at Chicxulub, Mexico, is globally recognized as one of the largest mass extinctions in natural history, marking the end of the Mesozoic Era. However, most of the outcrops with records and geochemical evidence of this boundary are distributed in the Northern Hemispher...
A Ilha Seymour, localizada a nordeste da Península Antártica, é famosa pela ampla ocorrência de fósseis que datam do final do Cretáceo até o final do Eoceno. O Projeto PALEOCLIMA, coordenado por pesquisadores da UNISINOS, realizou em 2019-20 e 2022-23 expedições científicas com o objetivo de coletar rochas e fósseis buscando informações sobre as mu...
Fossil plants, including large trunks, stems, some branches, and twigs, were collected from the Maastrichtian (68.9 Ma), upper Dorotea Formation in the Magallanes–Austral Basin, 16 km north of the Cerro Guido–Las Chinas complex in the southern Chilean Magallanes region. These fossil trunks range from 0.2 to 2.2 m in length. Petrographic slides were...
In the dusk of the Mesozoic, advanced duck-billed dinosaurs (Hadrosauridae) were so successful that they likely outcompeted other herbivores, contributing to declines in dinosaur diversity. From Laurasia, hadrosaurids dispersed widely, colonizing Africa, South America, and, allegedly, Antarctica. Here, we present the first species of a duck-billed...
In the dusk of the dinosaur era, the advanced duck-billed dinosaurs (Family Hadrosauridae) are thought to have outcompeted other herbivores, making ecosystems less diverse and more vulnerable to the Cretaceous-Paleogene asteroid impact. They were also among the first terrestrial organisms to disperse from North America into South America. Here, we...
Fossil plants are reported from beds exposed on northern Nelson Island, South Shetland Islands. The fossiliferous beds are exposed near sea level and constitute the basal intervals of sedimentary succession at Rip Point. The low diversity macrofossil assemblage contains only charcoalified woods and isolated fern pinnae. However, the palynoassemblag...
Armoured dinosaurs are well known for their evolution of specialized tail weapons—paired tail spikes in stegosaurs and heavy tail clubs in advanced ankylosaurs1. Armoured dinosaurs from southern Gondwana are rare and enigmatic, but probably include the earliest branches of Ankylosauria2–4. Here we describe a mostly complete, semi-articulated skelet...
Studies on the environmental dynamics of high energy beach systems have to deal with factors as diverse as wave energy, coastal currents and tidal amplitude. Their interaction produces complex and often poorly understood sedimentary architectures. As a rule, the results achieved do not allow us to understand the depositional architectures associate...
Armoured dinosaurs are well known for forms that evolved specialized tail weapons: paired tail spikes in stegosaurs, and heavy tail clubs in advanced ankylosaurs1. Armoured dinosaurs from southern Gondwana are rare and enigmatic, but likely include the earliest branches of Ankylosauria2-4. Here, we describe a mostly complete, semiarticulated skelet...
La historia paleontológica del Monte Tarn (825 m.s.n.m) se remonta al año 1873 en el que Charles Darwin descubre restos del ammonoídeo Maorites en su cima, adquiriendo una relevancia internacional al corresponder al primer invertebrado fósil descubierto
en Sudamérica. Sin embargo, a pesar de los cientos de años que han pasado desde la prospección d...
Se describe a Magallanodon baikashkenke gen. et. sp. nov., un nuevo mamífero gondwanaterio del Cretácico tardío de la Región de Magallanes, en el sur de Chile (Valle del Río de Las Chinas, Estancia Cerro Guido, norte de Puerto Natales, Provincia de Última Esperanza). Las capas portadoras se ubican entre los niveles del Campaniano tardío-Maastrichti...
We describe Magallanodon baikashkenke gen. et. sp. nov., a new gondwanatherian mammal from the Late Cretaceous of the Magallanes Region in southern Chile (Río de Las Chinas Valley, Estancia Cerro Guido, north of Puerto Natales city, Última Esperanza Province). The mammal-bearing layer is placed within the Late Campanian-Early Maastrichtian levels o...
We describe remains of freshwater turtles from the Upper Cretaceous of Chilean Patagonia. The fossils, which comprise isolated shell fragments and incomplete appendicular bones, were recovered from meandering fluvial deposits of the Dorotea Formation (upper Campanian–Danian), in the Río de Las Chinas Valley, Magallanes region. These remains represe...
The Magallanes-Austral foreland basin preserves an important record of orogenesis and landscape evolution in the Patagonian Andes of Chile and Argentina. Throughout the retroarc foreland basin, a regional disconformity with little to no angular discordance separates Upper Cretaceous–lower Paleocene strata from overlying deposits of diachronous Eoce...
No setor centro sul da Ilha Livingston, está localizado o afloramento de Hannah Point (Shetland do Sul, Península Antártica), foram reconhecidos níveis com abundante flora fóssil. A Ilha Livingston se encontra no contexto de forearc e faz parte de um sistema de falhas produto da separação gradual do Gondwana. Resultado desta complexa gênesis tectôn...
The Campanian–Maastrichtian succession of Cerro Guido, Southern Chile, is known by its plant fossils, vertebrates bones, including those of dinosaurs, and marine faunas that can be critical in the better understanding of the processes involved in the Western Gondwana break-up in the southernmost paleolatitudes and their effects over life, paleoclim...
The stratigraphic architecture and environmental evolution of the Cerro Guido-Rio de las Chinas Valley Complex contains the upper Cretaceous to Eocene record of the Magallanes/Austral Basin, located in southernmost Chile. This retroarc foreland basin contains a significant record of early Cretaceous to Miocene biogeographic and environmental change...
La Formación Dorotea es una unidad rocosa del Cretácico Superior (Campaniano superior–Maastrichtiano) que aflora en el
margen nororiental de la provincia de Última Esperanza, región de Magallanes. En varios yacimientos de esta unidad, caracterizada por un sistema de deltas y ríos de meandros, se han preservado un extenso registro faunístico debido...
Introducción
En la Provincia de Última Esperanza en rocas pertenecientes a la Formación Dorotea (Katz,
1963) se registran nuevos restos de vertebrados fósiles del Cretácico Superior, la que está
caracterizada por facies continentales y marinas someras. Esta formación de edad
Campaniana superior - Maastrichtiana (Gutiérrez et al. 2017; Schwartz et a...
En el presente estudio se analizan y describen nuevos materiales hallados en la localidad
estratotipo de la Formación Quiriquina, (Bahía las Tablas). Destacan Carcharias aff. latus y Orectolobiformes indet que corresponden a niveles de edad maastrichtiana superior.
Se presentan los resultados del estudio de improntas foliares fósiles provenientes de las Formaciones Tres Pasos y Dorotea (Cretácico superior). Se incorporan detalles de la determinación taxonómica, tales como los caracteres morfológicos y patrones de venación diagnósticos. Las comparaciones permiten asignar estas improntas al género Brachychiton....
En el presente trabajo se dan a conocer nuevos fósiles de anuros colectados durante el
presente año en la campaña paleontológica realizada en la localidad del Valle de Las Chinas,
región de Magallanes, provenientes de rocas de la Formación Dorotea (Cretácico Superior).
Los restos recuperados indican que existió una diversidad de anfibios en asociac...
Resumen
En esta contribución se expone la metodología utilizada en la extracción de un nuevo
dinosaurio ornitópodo en afloramientos de la Formación Dorotea (CampanianoMaastrichtiano), en la región de Magallanes. Se discuten las dificultades y técnicas básicas
relacionadas con la extracción de fósiles de un vertebrado, así como los aspectos logístic...
Patagonia evoca, desde tiempos inmemoriales, a lo
remoto, antiguo, lo primitivo. 123 años han pasado
desde que Eberhard encontrara la Cueva del Milodón
y su piel despertara las mentes de miles de lectores
que devoraban los fantásticos relatos sobre la cacería
del mítico perezoso gigante.
Desde esos años, una ingente cantidad de
conocimiento científ...
Resumen. El registro óseo de dinosaurios no avianos en Chile está principalmente representado por saurópodos, los cuales son registrados desde el Titoniano hasta el Maastrichtiano. Dentro de este grupo, los hallazgos más abundantes corresponden a titanosaurios (Sauropoda, Lithostrotia), clado abundante en el Cretácico de Sudamérica y bien represent...
En la Provincia de Última Esperanza, en el valle del Río Las Chinas, se realiza el levantamiento estratigráfico, correspondiente a la ladera Este del valle. Se generan alrededor de 9 columnas estratigráficas, y a través del análisis de litofacies y biofacies, se reconstruye el ambiente de depositación, correspondiente a un ambiente cercano a la cos...
The early Late Cretaceous (Cenomanian-early Turonian) was characterized by extreme greenhouse conditions. Polar Regions were free of ice and sea surface temperatures may have reached 35°C, or more. Late Cretaceous times are still considered to have been greenhouse-dominated, but a major gradual decline in global temperatures is seen during the Late...
The Cretaceous stratigraphy of the Ultima Esperanza District, southern Chile, is exposed
parallel to the adjacent fold-thrust belt of the Patagonian Andes and reflects the evolution of
the Magallanes retroarc foreland basin. The final filling of the basin is known as the Dorotea
Formation which represents a delta system of Maastrichtian–Danian age....
The Las Chinas-Cerro Guido Complex is located north of the Magallanes Region, southern
Chile, and has been visited by scientiic expeditions since 1898. Summarizing the results of
this previous works, a Late Cretaceous environment (Campanian-Maastrichtian) was reported
with a transition of marine to deltaic deposition. The paleolora was dominated by...
