Article
Geography, Physical
F. J. Rodriguez-Tovar, J. Dorador, V Zuchuat, S. Planke, O. Hammer
Summary: The study focuses on the ichnological analysis of an extended upper Permian - Lower Triassic succession from the DD-1 core, drilled in Deltadalen, Central Spitsbergen. Variations in degree of bioturbation and ichnodiversity across the Permian-Triassic transition allow for the characterization of pre-, syn-, and post-EPME phases.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geography, Physical
Santiago Casanova-Arenillas, Francisco J. Rodriguez-Tovar, Francisca Martinez-Ruiz
Summary: Research has shown that during the Last Glacial Cycle, climatically induced changes in ocean dynamics affected the tracemaker habitat in the Alboran Sea Basin. The trace fossil assemblage exhibited long-term and short-term fluctuations, correlating with sea-surface temperature records and delta O-18 profiles of Greenland ice cores. This indicates a reconstruction of climatically induced changes in ocean dynamics that have significant impacts on deep-sea environmental conditions in the Western Mediterranean Deep Water.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geology
Santiago Falces-Delgado, Noe Garcia-Martinez, Alice Giannetti, Jose F. Baeza-Carratala
Summary: The Berriasian carbonate successions in the Prebetic Domain of southeastern Spain exhibit reef-associated environments and previously unreported diceratid biota. Interpretation of different sub-environments reveals a gradual increase in depth from nearshore to offshore in the shallow water platform. This study is important for understanding the evolution of the Cretaceous biota and environments in this region.
CRETACEOUS RESEARCH
(2022)
Article
Paleontology
Hannes Loeser, Luis M. Nieto, Jose Manuel Castro, Matias Reolid
Summary: A taxonomic description of a coral fauna from the Lower Valanginian of the Sierra de Cazorla in SE Spain is provided, with 51 species in 29 genera, including one genus and three species described as new. The fauna shows a mix of typical Jurassic taxa and Cretaceous elements, with some genera extending their range into the Early Valanginian. Paleo-biogeographic analysis indicates relationships to the northern Tethys and other regions. Several species remain in open nomenclature, potentially representing new species.
PALAEONTOLOGIA ELECTRONICA
(2021)
Article
Paleontology
Melani Berrocal-Casero, Juan Alberto Perez-Valera, Matias Reolid, Gines De Gea, Antonio Espin De Gea, Francisco Manuel Penalver Aroca, Fernando Perez-Valera
Summary: A new small marine reptile from the Triassic has been discovered in Cehegin, Spain. Fossil remains include bone moulds and fragments, revealing an articulated sauropterygian. This find, the most complete sauropterygian in the South Iberian Palaeomargin of the Tethys, provides new insights into the diversity and distribution of Sauropterygia in the Middle Triassic.
Article
Geosciences, Multidisciplinary
Alba Gonzalez-Lanchas, Javier Dorador, Francisco J. Rodriguez-Tovar, Francisco J. Sierro, Jose-Abel Flores
Summary: This study investigates the response of the macrobenthic trace maker community to deep paleoenvironmental conditions in the western Mediterranean Alboran Sea. The results show that oxygen availability and surface organic productivity are the key factors controlling the variations in the community. The intense Alboran Upwelling System during Termination V resulted in decreased bioturbation and the formation of an Organic Rich Layer, while the stable surface production during MIS 11c led to an oligotrophic and stable deep environment. The Heinrich-type events 3 and 2 had a minor impact on surface organic production but enhanced deep-water circulation and removal.
Article
Geosciences, Multidisciplinary
M. Gabriela Mangano, Luis A. Buatois, Robert B. MacNaughton, Soren Jensen, Romain Gougeon, Alberto Marcos, Dean Meek, Laura Pinuela, Jose Carlos Garcia-Ramos
Summary: This study reevaluates the Cambrian trace fossil Psammichnites and reinterprets the previously named Taphrhelminthopsis circularis as a variant of Psammichnites gigas. The relationships between Psammichnites and other trace fossils commonly found in Cambrian shallow-marine strata are also discussed. Recommendations for renaming some trace fossils are provided. This documentation of the preservational variability of Cambrian Psammichnites is important for accurately estimating ichnodiversity levels during the Cambrian explosion and for stratigraphic correlation.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geology
Carlos A. Giraldo-Villegas, Francisco J. Rodriguez-Tovar, Sergio A. Celis, Andres Pardo-Trujillo, Monica L. Duque-Castano
Summary: The Late Cretaceous in northwest South America was characterized by synchronous regional geological processes, and this study focuses on the interaction between the Caribbean Large Igneous Province and the NW margin of South America. The sedimentation in the region is mainly influenced by marine processes and turbiditic deposits.
CRETACEOUS RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
Quan-feng Zheng, Hua Zhang, Dong-xun Yuan, Yue Wang, Wen-qian Wang, Chang-qun Cao, Shu-zhong Shen
Summary: This study reconstructs the variations in benthic marine oxygen levels from the Late Permian to the Early Triassic in the Shangsi section, China, using high-resolution trace fossil data and other redox-sensitive proxies. The results show the presence of both high-frequency and long-term variations in benthic oxygen levels, as well as an anoxia event during the middle-late Wuchiapingian and a global oxygenation event during the Changhsingian.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geosciences, Multidisciplinary
Xuan Yang, Chao Chang, Yanlong Chen, Timothy Topper, Fan Liu, Yue Liang, Ruisen Fang, Zhifei Zhang
Summary: The Sujiawa section in East Yunnan is of utmost importance in studying the Ediacaran-Cambrian transition. Carbon isotope and trace element analyses reveal the environmental changes during this period, showing suboxic-oxic-anoxic conditions and a negative carbon isotope excursion event.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Multidisciplinary Sciences
William J. Foster, Amanda Godbold, Arnaud Brayard, Anja B. Frank, Stephen E. Grasby, Richard J. Twitchett, Tatsuo Oji
Summary: This study presents a paleoecological analysis of the Hiraiso Formation in northeast Japan, revealing the temporal and spatial variations of diversity, ecological structure, and taxonomic composition in the Early Triassic marine ecosystems. The study suggests that the benthic fauna in the Hiraiso Formation represents an advanced stage of ecological recovery, but not full recovery. The distribution of the benthic fauna supports the habitable zone hypothesis and is consistent with oxygen gradients in modern environments.
Article
Biology
Christophe Hendrickx, Phil R. Bell, Michael Pittman, Andrew R. C. Milner, Elena Cuesta, Jingmai O'Connor, Mark Loewen, Philip J. Currie, Octavio Mateus, Thomas G. Kaye, Rafael Delcourt
Summary: Non-avialan theropods exhibit diverse skin structures, including scales, naked skin, and dermal ossifications, but limited preservation of skin on most specimens hinders further investigation. Reticulate scales are ubiquitous in footprints of these dinosaurs, suggesting a consistent pattern of tiny scales on the plantar surface of their feet.
BIOLOGICAL REVIEWS
(2022)
Article
Biology
Mei Luo, Fan Liu, Yue Liang, Luke C. Strotz, Jiayue Wang, Yazhou Hu, Baopeng Song, Lars E. Holmer, Zhifei Zhang
Summary: Small skeletal fossils from the early Cambrian Guojiaba Formation in southern Shaanxi, China were reported for the first time. The fossils include a wide variety of skeletal clades, such as brachiopods, sphenothallids, archaeocyaths, bradoriids, sponge spicules, echinoderm plates, and trilobite spines. The archaeocyaths found in the Guojiaba Formation are older than those previously described from the Xiannvdong Formation. The fossil assemblages from the Guojiaba Formation resemble those from the upper Yu'anshan Formation (Chengjiang Fauna) in eastern Yunnan Province, supporting the correlation of the Guojiaba Formation with the Chiungchussuan Stage (Stage 3 of Cambrian Series 2).
Article
Geology
Jose Francisco Baeza-Carratala, Matias Reolid, Alice Giannetti, David Benavente, Jaime Cuevas-Gonzalez
Summary: The Early Jurassic in the westernmost Tethys Ocean saw critical environmental changes affecting marine ecosystems, particularly impacting brachiopods in the South-Iberian Palaeomargin. Geochemical analysis of brachiopod shells revealed clear synchrony between trace element oscillations, global trends in the C and O cycling, and faunal diversity dynamics, validating global and regional models related to platform collapse and the early Toarcian biotic crisis. Oxygen depletion played a secondary role as an environmental stress factor for benthic fauna, with increasing temperature gradient and other triggering factors like shifts in palaeoproductivity and hydrothermal input being more significant in the major environmental perturbation events during the Sinemurian-Pliensbachian turnover and the Toarcian crisis.
ESTUDIOS GEOLOGICOS-MADRID
(2021)
Article
Geosciences, Multidisciplinary
Francisco J. Rodriguez-Tovar
Summary: The sedimentary processes and trace fossil information in deep-sea environments are crucial for studying paleoenvironmental conditions and facies, highlighting similarities and differences among various deep-sea facies.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geography, Physical
Wolfgang Ruebsam, Matias Reolid, Emanuela Mattioli, Lorenz Schwark
Summary: During the early Toarcian period, global environmental changes led to the expansion of oxygen-deficient conditions around the world, promoting the occurrence of the Toarcian Oceanic Anoxic Event. Higher-level global factors controlled temperature fluctuations, sea level evolution, oceanic circulation patterns, marine primary productivity, and stable carbon isotope excursions, while lower-level factors operated on individual basin bathymetry and paleogeography, regulating local to regional organic matter accumulation.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Paleontology
Luca Pandolfi, Joaquin Sendra, Matias Reolid, Lorenzo Rook
Summary: This study investigates a fragmentary mandible from the early Pliocene of the Vera Basin to clarify its taxonomic position and assigns it to Pliorhinus megarhinus. Morphometrical comparison reveals differences between P. megarhinus and other species, providing new insights into the Pliocene Spanish rhinocerotine record.
Article
Geochemistry & Geophysics
Luis M. Nieto, Jose Miguel Molina, Pedro Alejandro Ruiz-Ortiz, Jose Manuel Castro, Matias Reolid, Gines A. de Gea
Summary: This article describes an extensional phase during the Aptian-Albian transition in the Prebetic region, which led to the formation of shallow carbonate platforms. The presence of palustrine sediments between two shallow carbonate platforms is described for the first time. These findings are significant for understanding the geological history and changes.
Article
Geosciences, Multidisciplinary
Mahmoud Sharafi, Matias Reolid, Aram Bayet-Goll, Maryam Mohamadi, Mohammad Khanehbad, Asadollah Mahboubi, Reza Moussavi-Harami
Summary: The carbonate-dominated successions of the Tirgan Formation in the Kopet-Dagh Basin were studied to understand the tectonic and eustatic sea-level effects and autogenic influences on facies changes and sequence stratigraphy. Fourteen facies were identified and grouped into five associations based on depositional settings. A third-order depositional sequence was identified, along with several cycles. The development of the sequences and cycles was controlled by allogenic and autogenic factors. The study provides insights into sedimentary basin evolution and paleogeographic reconstructions.
GEOLOGICAL JOURNAL
(2022)
Article
Geology
Mahmoud Sharafi, M. Reolid, A. Bayet-Goll, M. Sadeghzadeh
Summary: The Lower Carboniferous carbonate sediments of the Mobarak Formation were analyzed to evaluate the role of allogenic and autogenic factors on the development of a distally steepened carbonate platform. Thirteen facies were identified and grouped into four facies associations. The formation of depositional sequences was controlled by tectonic activity and eustatic sea-level changes, while the development of the FSST package was influenced by increasing tectonic activity and autogenic factors.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geosciences, Multidisciplinary
Ali Mokhtar Samet, Matias Reolid, Abbas Marok, Shin-ichi Kamikuri
Summary: The geological records of the Lower Chelif Basin provide insights into the early stages of Mediterranean restrictions. The study reveals a close relationship between the changes in microfossil assemblages, such as benthic foraminifera, radiolarians, and planktic foraminifera, and the environmental conditions of oxygen depletion and reoxygenation.
JOURNAL OF AFRICAN EARTH SCIENCES
(2022)
Article
Geology
Mohamed Bendali, Abdeslam Abtout, Boualem Bouyahiaoui, Hassina Boukerbout, Abbas Marok, Matias Reolid
Summary: The Chelif Basin in North Algeria is highly seismically active and little is known about its eastern part, the Upper Chelif Basin. This study conducted a new gravity survey to understand the structural architecture and lithological information of the Upper Chelif Basin. Different processing methods were applied to the gravity data, which revealed 2D and 3D images of the studied area and identified gravity anomalies and structures related to tectonic features. The results showcase the presence of dense geological bodies and provide valuable insights into the neotectonic structures of the basin.
JOURNAL OF IBERIAN GEOLOGY
(2022)
Article
Geology
M. Poyatos-More, F. Garcia-Garcia, F. J. Rodriguez-Tovar, J. Soria, C. Viseras, F. Perez-Valera, I Midtkandal
Summary: This study presents an outcrop example from the Upper Miocene of the Betic Cordillera (Spain) to propose a model for the development of transgressive sharp-based mixed carbonate-silicidastic deposits and provide criteria to differentiate them from their regressive counterparts.
SEDIMENTARY GEOLOGY
(2022)
Article
Geography, Physical
Matias Reolid, Nigel Richard Ainsworth
Summary: Based on the study of sediments recovered from the Kerr McGee 97/12-1 well, three main ecostratigraphic intervals were identified. The uppermost Pliensbachian interval had a diverse foraminiferal assemblage dominated by Lenticulina muensteri, representing a phase before the biotic crisis. The ecostratigraphic interval related to the deposition of the lower Toarcian black claystones showed a drastic change in foraminiferal assemblages, with Reinholdella as the dominant form, indicating the biotic crisis phase. The ecostratigraphic interval from the upper part of the lower Toarcian to the upper Toarcian had increased foraminiferal diversity and abundance, suggesting the recovery of normal conditions.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Chemistry, Physical
Isabel Abad, Fernando Nieto, Matias Reolid, Juan Jimenez-Millan
Summary: Geochemical changes and authigenic clays were detected in the fault rocks of the Padul Fault. The precipitation of chlorite and talc, promoted by hydrothermal fluid circulation near 200℃, was observed in the fault rocks. The presence of these authigenic clay minerals is consistent with the geological characteristics of the Padul Fault and plays an important role in aseismic deformation.
APPLIED CLAY SCIENCE
(2022)
Article
Geology
Wouter de Weger, F. Javier Hernandez-Molina, Francisco Javier Sierro, Domenico Chiarella, Estefania Llave, Juan J. Fedele, Francisco Javier Rodrigues-Tovar, Olmo Miguez-Salas, Mohamed Amine Manar
Summary: This study reports the sedimentary evolution and facies distribution of a contourite channel system related to the late Miocene palaeo-Mediterranean Outflow Water in the Rifian Corridor, Morocco. The channel evolution and facies distribution are found to be related to spatiotemporal changes in flow characteristics of the palaeo-Mediterranean Outflow Water.
Article
Geology
Gijs van Dijk, Jasper Maars, Federico Andreetto, F. Javier Hernandez-Molina, Francisco. J. J. Rodriguez-Tovar, Wout Krijgsman
Summary: A unique sedimentary deposit called the Arenazzolo Formation in the Sicilian Caltanissetta Basin, Italy, has been studied to understand its origin and its link to the Messinian Salinity Crisis. This sandy deposit was formed by persistent bottom currents during a transgression, possibly associated with the reconnection of major isolated water bodies.
Article
Multidisciplinary Sciences
Carolina Fonseca, Joao Graciano Mendonca Filho, Matias Reolid, Luis V. Duarte, Antonio Donizeti de Oliveira, Jaqueline Torres Souza, Carine Lezin
Summary: Choanoflagellates, microeukaryotes found in freshwater and marine environments, have been considered the closest relatives of animals. This study describes the first potential occurrence of choanoflagellates in Cretaceous sediments and discusses its paleoenvironmental significance. The classification of these organisms and their genetic origin are also discussed. This discovery provides insight into the origins of animals and offers guidelines for future identification of choanoflagellates in the geological record.
SCIENTIFIC REPORTS
(2023)
Article
Paleontology
Melani Berrocal-Casero, Juan Alberto Perez-Valera, Matias Reolid, Gines De Gea, Antonio Espin De Gea, Francisco Manuel Penalver Aroca, Fernando Perez-Valera
Summary: A new small marine reptile from the Triassic has been discovered in Cehegin, Spain. Fossil remains include bone moulds and fragments, revealing an articulated sauropterygian. This find, the most complete sauropterygian in the South Iberian Palaeomargin of the Tethys, provides new insights into the diversity and distribution of Sauropterygia in the Middle Triassic.
Article
Geosciences, Multidisciplinary
Celia Martin-Puertas, Armand Hernandez, Eulogio Pardo-Iguzquiza, Laura Boyall, Chris Brierley, Zhiyi Jiang, Rik Tjallingii, Simon P. E. Blockley, Francisco Javier Rodriguez-Tovar
Summary: According to a lake-sediment record and model simulations, meltwater discharge in the mid-Holocene North Atlantic disrupted decadal climate variability, suggesting that future melting on Greenland may hinder climate predictability in the region.
Article
Geology
Jimmy de Rooij, Sybrand A. N. Lucassen, Charlotte Furer, Anne S. Schulp, P. Martin Sander
Summary: This study presents a detailed osteohistological analysis on Triceratops horridus and Triceratops cf. prorsus specimens, aiming to understand the growth and development of ceratopsids. The analysis reveals a distinct pattern of bone tissue growth in Triceratops limb elements, but also suggests that taxonomic ambiguity between Torosaurus and Triceratops cannot be solely resolved based on histological data.
CRETACEOUS RESEARCH
(2024)
Review
Geology
J. R. Ovando-Figueroa, J. A. Moreno-Bedmar, M. Company, J. A. Jacobo-Delgado
Summary: This article presents a review of ammonoid specimens from the Berriasian and Valanginian age in Zacatecas, Mexico. The study includes updated museographic information, new images, and 3D models of the specimens. Taxonomic identification has revealed six species and two genera. Stratigraphic range data suggests that the specimens belong to the uppermost upper Berriasian to lower Valanginian interval, with several biozones identified. Additionally, a paleobiogeographic analysis indicates a clear affinity with contemporaneous ammonoid assemblages from the Mediterranean region.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Jake Kotevski, Ruairidh J. Duncan, Adele H. Pentland, James P. Rule, Patricia Vickers-Rich, Thomas H. Rich, Erich M. G. Fitzgerald, Alistair R. Evans, Stephen F. Poropat
Summary: The cranial remains of non-avian theropod dinosaurs from the Cretaceous period in Australia are poorly understood. This study presents new evidence of non-mandibular cranial material, possibly belonging to the Megaraptoridae family, and contributes to the limited knowledge of Australian Cretaceous theropod cranial remains.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Josh Jenkins Shaw, Alexey Solodovnikov, Evgeny E. Perkovsky
Summary: A fossil of the monogeneric rove beetle subfamily Trichophyinae (genus Trichophya) has been discovered in the Upper Cretaceous Taimyr amber from northern Siberia. This finding indicates the morphological differences between ancient and modern Trichophya species groups. By comparing the morphology, distribution, and habitat requirements of extant species, the taxonomy, biogeography, and paleoecology of the Trichophya in Taimyr amber can be better understood.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Martin Kostak, Frank Wiese, Zuzana Kozlova, Adam Culka, Martin Mazuch, Martin Soucek
Summary: A well-preserved fossil of an upper Cretaceous acanthoceratoid ammonite has been discovered in the Bohemian Cretaceous Basin, providing important insights into the jaw anatomy of these extinct organisms.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Gustavo Santiago, Marcelo de Araujo Carvalho, Renato Rodriguez Cabral Ramos, Sandro Marcelo Scheffler
Summary: The Santa Marta Formation in the Antarctic Peninsula is an important sedimentary sequence that provides insights into paleoenvironmental changes. The distribution of sedimentary organic matter reveals three distinct palynofacies associations and shows a progressive transgression from terrestrial to marine environments.
CRETACEOUS RESEARCH
(2024)
Article
Geology
B. J. Vazquez, D. Castanera, B. Vila
Summary: In Europe, the fossil record of sauropods in the uppermost Cretaceous is mainly found in Spain, France, and Romania. Recently, a significant discovery of titanosaurs' teeth was made in Els Nerets, Spain, which contains the largest tooth sample from the Late Cretaceous in Europe. The teeth show distinct characteristics but cannot be attributed to any known European species. Based on tooth morphology and wear facets distribution, a new taxon is proposed.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Youssef S. Bazeen, Walid G. Kassab, El Sayed M. Moneer, Gebely A. Abu El-Kheir, Mohamed K. Abdelgawad, Haitham M. Ayyad
Summary: This study investigates the Maastrichtian-Danian succession in the Abu Minqar section of the Western Desert of Egypt, using an integrated analysis of biostratigraphy and chemostratigraphy. The results suggest that regional tectonics played a substantial role in the depositional history and paleoenvironmental circumstances of the southern Tethys margin.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Fernando R. Rios, Ana M. P. Mizusaki, Rualdo Menegat, Isaque C. Rodrigues
Summary: This study examines the temporal and spatial relationships between fluvio-aeolian, aeolian, and volcanic systems in the southernmost part of the Parana Basin during the Late Jurassic and Early Cretaceous. By analyzing facies and architectural elements, the evolution of the volcano-sedimentary record is reconstructed.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Antonio M. Casas, Arsenio Munoz, Alberto Tella, Carlos L. Liesa
Summary: This work proposes the application of magnetic surveying to study the cyclicity in sedimentary basins. Through measuring the total magnetic field and vertical magnetic gradient, the short-wavelength magnetic anomalies associated with the sedimentary sequence can be analyzed, providing information about the magnetic susceptibility and magnetic remanence of different sedimentary units. The cyclostratigraphic analysis reveals the existence of various cycles and enables the dating of the basin fill, offering new constraints for basin evolution.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Ottilia Szives, Josep A. Moreno-Bedmar, Beatriz Aguirre-Urreta, Miguel Company, Camille Frau, Mikel Lopez-Horgue, Antoine Pictet, Izabela Ploch, Christian Salazar, Ricardo Barragan, Jean -Louis Latil, Jens Lehmann, Stephane Reboulet, Emmanuel Robert
Summary: The 7th meeting of the IUGS Lower Cretaceous Ammonite Working Group discussed important changes in the geological age classification, including adjustments and improvements to the upper Tithonian-Berriasian, upper Aptian, and Albian stages. The meeting also discussed the Valanginian and Hauterivian stages, and provided discussions on zonal indices and units, emphasizing the use of interval zones and subzones.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Felix Schlagintweit, David Gercar, Bostjan Rozic
Summary: A mixed assemblage of planktonic and benthonic foraminifera has been found in the Lower Flyschoid Formation in the western part of the Slovenian Basin. These findings provide valuable insights into the biostratigraphy and paleogeographic configuration of the region during the Early to Middle Cretaceous.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Arkaprava Mukhopadhyay, Debarati Chattopadhyay, Arghya Poddar, Ranita Saha, Sachin Patil, Tushar Sonkar, Sujoy Das, Rudranil Basak, Shubhabrata Paul, Arindam Roy
Summary: Predator-prey interaction exerts significant selection pressure on the evolutionary pathways of both parties. This research presents a new dataset of gastropod drilling predation on molluscan prey from the Upper Cretaceous, highlighting the influence of drilling predation during this period. The study utilizes a hybrid method of surface sampling without physically breaking the host rock. Findings suggest that drilling predation was an established form of predation during the Late Cretaceous, yet remains understudied.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Dany Azar, Andre Nel
Summary: Lebanoaktassia curiosa is a new genus and species of strange dragonfly, representing the first Gondwanan species of the family Aktassiidae. It was found in Hjoula, Lebanon, along with two endemic dragonfly families, suggesting a possible connection to an island insular system in the Early Cretaceous.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Pablo M. Villegas, A. Martin Umazano, Marcelo Krause, Mariana Brea
Summary: Conifer fossil woods from the Campanian Puntudo Chico Formation were studied, confirming the presence of Brachyoxylon currumillii and the introduction of Cupressinoxylon sp. cf. C. artabeae in the formation. The new specimens of Podocarpoxylon mazzonii suggest that this taxon is common in the Cretaceous to Eocene floristic assemblages. The growth-ring analysis of these fossil trees indicates their development under temperate and humid conditions, with slight sensitivity from year to year and a terminal event representing a cessation or retardation of cambial activity. Other paleoclimatic proxies suggest a temperate-warm and humid depositional environment with some semi-arid events in the Puntudo Chico Formation.
CRETACEOUS RESEARCH
(2024)
