Article
Geology
Seyed Naser Raisossadat, Jean-Louis Latil, Hayat Hamdani, Etienne Jaillard, Hassan Amiribakhtiar
Summary: In the Zagros Basin in southwestern Iran, a 270 m thick section of shales has yielded a diverse ammonite fauna, allowing for a detailed biostratigraphic zonation. The findings include Aptian and Albian age indicators based on the ammonite families found in the sediment layers.
CRETACEOUS RESEARCH
(2021)
Article
Geology
Etienne Jaillard, Jean-Louis Latil, Jean-Pierre Masse, Rabaa Hfaiedh
Summary: The detailed study of sedimentology and biostratigraphy in the Chott area, southern Central Tunisia, identifies several well-dated depositional sequences in the upper Aptian-Albian series. The upper Aptian sequences show a transition from shallow marine evaporitic deposits to clastic deposits and yield latest Aptian ammonites. The boundary between the Aptian and Albian is suggested to have a long-lasting hiatus and a change from clastic to carbonate deposits. The Albian transgression is expressed by the Knemiceras Beds, which can be correlated with the lower Albian in Central Tunisia based on new ammonite findings. The Knemiceras beds exhibit five distinct morphologies of Knemiceras sp. The overlying massive shelf carbonates are assigned to the uppermost lower Albian and correlated with the Allam Limestone of Central Tunisia. The carbonates are capped by a major discontinuity, correlated with a middle Albian discontinuity in Central Tunisia. The study presents and illustrates the ammonites and rudists fauna found in the area.
CRETACEOUS RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Majid Alipour
Summary: This research uses organic geochemical and sequence stratigraphic principles to reveal the mechanisms controlling organic enrichment in the Kazhdumi Formation. The petroleum source rocks are deposited during times of relative sea-level rise and euxinic conditions, and the organic matter types vary greatly in the paleo-depositional environments. These findings have practical implications for future geochemical studies and petroleum system analysis.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geology
Marco Romano, Paolo Citton, Angelo Cipriani, Simone Fabbi, Ferdinando Spano, Giuseppe Marrama, Giorgio Carnevale
Summary: The first occurrence of lamniform vertebrae from the Cretaceous of the Umbria-Marche Domain in Italy is reported, providing important information for the paleobiology of the region. The fossil material, although limited, suggests the presence of a small-medium sized fusiform and pelagic lamniform shark with characteristics indicating consistent maneuverability and moderately fast swimming.
CRETACEOUS RESEARCH
(2021)
Article
Geology
Javad Shari, Mohammad Vahidinia, Atsushi Ando, Mohamad Hosein Mahmudy-Gharaie
Summary: This study presents a detailed planktonic foraminiferal biostratigraphic framework for the Aptian-Albian sedimentary succession in SW Iran, along with supporting ammonite data. It proposes five new biozones and suggests the location of the Aptian/Albian boundary within a narrow interval marked by faunal turnover. The biozonation of the studied section is considered an important step towards better understanding the biotic and global changes across the Aptian/Albian boundary.
CRETACEOUS RESEARCH
(2021)
Article
Geology
Jean-Louis Latil, Etienne Jaillard
Summary: This study investigates the phylogeny of knemiceratids and acanthohoplitinids in the Chott Basin of southern Central Tunisia and describes five new ammonite species, highlighting the endemic character of the ammonite faunas in this region.
CRETACEOUS RESEARCH
(2024)
Article
Geography, Physical
Gerson Fauth, Guilherme Krahl, Karlos Guilherme Diemer Kochhann, Marlone Heliara Huennig Bom, Simone Baecker-Fauth, Mauro Daniel Rodrigues Bruno, Rodrigo do Monte Guerra, Daiane Ceolin, Alessandra da Silva dos Santos, Jorge Villegas-Martin, Oscar Strohschoen, Jairo Francisco Savian, Carolina Gonsalves Leandro, Raquel Gewehr de Mello, Francisco Henrique de Oliveira Lima
Summary: Perturbations in the carbon cycle have had a dramatic impact on the ocean-climate system during the Aptian-Albian transition. However, the exact timing of this period is still heavily debated. In this study, a comprehensive astronomical calibration is presented to estimate the age of planktonic foraminiferal and calcareous nannofossil bioevents in the Sergipe-Alagoas Basin. The results show that the biostratigraphic markers align with previous estimates within one long eccentricity cycle. Additionally, geochemical records such as stable carbon isotopes and organic carbon contents provide insights into the changes across the Aptian-Albian boundary, particularly related to Oceanic Anoxic Event 1b (OAE 1b) in low latitude records.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Geology
Mohsen Yazdi-Moghadam, Seyed Naser Raisossadat, Felix Schlagintweit, Maryam Mortazavi Mehrizi, Hoorieh Zarei
Summary: The biostratigraphic and palaeogeographic aspects of the Lower Cretaceous Orbitolina limestone in Central Iran were analyzed, providing high-resolution dating of this unit in the Lut Block for the first time. The fossil assemblages are dominated by orbitolinid larger benthic foraminifera. Based on the identified orbitolinids, an age of late early Aptian was determined for the study area. The results suggest a correction to the previous understanding of the distribution of the Praeorbitolina/Palorbitolinoides Association during the Lower Cretaceous.
CRETACEOUS RESEARCH
(2023)
Article
Multidisciplinary Sciences
Baoxia Du, Mingzhen Zhang, Bainian Sun, Aijing Li, Jing Zhang, Defei Yan, Sanping Xie, Jingyu Wu
Summary: Gansufructus saligna gen. et sp. nov. is a fossil eudicot plant discovered in the Early Cretaceous of Gansu Province, Northwest China, with alternate leaves, short petioles, linear-lanceolate shape, and carpels containing three to five seeds. Its leaf and axis characteristics suggest a terrestrial herbaceous habit.
NATIONAL SCIENCE REVIEW
(2021)
Article
Geosciences, Multidisciplinary
Lirong Dou, Xinshun Zhang, Kunye Xiao, Dangpeng Xi, Yebo Du, Li Wang, Jie Hu, Ying Hu, Qianyu Zheng
Summary: Based on a systematic palynological analysis, this study reveals a shift from arid to humid climate in Central Africa during the late Aptian to early Albian, which is consistent with the results from South America.
GEOLOGICAL JOURNAL
(2023)
Article
Geosciences, Multidisciplinary
Jianliang Jia, Changsheng Miao, Wenquan Xie
Summary: In this study, new data from mudrocks in the Fuxin Basin of NE China provide a high-resolution terrestrial climate record from East Asia during the late Aptian to early Albian. The results show a cooling period during the late Aptian, breaking the trend of global warming in the mid-Cretaceous. The study suggests that enhanced continental weathering and weakened plate drift induced changes in atmospheric CO2, leading to the cooling climate in the Fuxin Basin.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2023)
Article
Multidisciplinary Sciences
Damares Ribeiro Alencar, William Santana, Allysson Pontes Pinheiro, Daniel Lima, Antonio Alamo Feitosa Saraiva, Gustavo Ribeiro de Oliveira
Summary: We describe a new stenopodidean shrimp, Dubiostenopus parvus n. gen. n. sp., from the Romualdo Formation of Brazil. This is the first stenopodidean shrimp described from the Romualdo Formation and South America. The specimen is approximately 10 mm in length with a robust cephalothorax and well-developed cheliped.
Article
Energy & Fuels
Danielle Marques-Lima, Joao Graciano Mendonca Filho, Carolina Fonseca, Antonio Donizeti de Oliveira, Joalice de Oliveira Mendonca, Paula Alexandra Goncalves
Summary: The Aptian-Albian sedimentary record of the Parnaiba Basin in NE Brazil provides insights into the evolution of a large shallow sag basin during the early opening stages of the South Atlantic. The study characterizes the nature, variability, and paleoenvironmental significance of the organic matter in the sedimentary succession, revealing alternating lacustrine and restriction periods with different depositional environments and organic contributions.
INTERNATIONAL JOURNAL OF COAL GEOLOGY
(2023)
Article
Multidisciplinary Sciences
Yann Rollot, Serjoscha W. Evers, Stephanie E. Pierce, Walter G. Joyce
Summary: This study utilizes micro-computed tomography to analyze the skull of an Early Cretaceous baenid turtle, providing new insights into its cranial anatomy and the evolutionary relationship with other baenid and paracryptodire species.
Article
Geology
Bruna Poatskievick Pierezan, Andrew S. Gale, Gerson Fauth
Summary: A new genus and species of roveacrinid, Sergipecrinus reticulatus, is described from the upper Aptian and lower Albian of the Sergipe-Alagoas Basin, northeast Brazil, based on abundant cups and isolated brachials from core SER-03. This is the first roveacrinid of Aptian age to be described and provides important information concerning the early history of the Roveacrinidae.
CRETACEOUS RESEARCH
(2023)
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)