Article
Geosciences, Multidisciplinary
Sahar Hassan, Sameh S. Tahoun, Mohamed Darwish, William Bosworth, Ahmed E. Radwan
Summary: An integrated approach combining borehole image logs, palynology, and conventional wireline logs, as well as global chronostratigraphic charts, has been used to study the chrono-lithological boundary between the Kharita and Bahariya formations and the Albian and Cenomanian Stages in the Abu Gharadig Basin. The interpreted reservoir intervals suggest that the hydrocarbons trapped in the Albian-Cenomanian reservoirs are composed of type II/III kerogen. The study provides comprehensive information about the Albian-Cenomanian succession in the Northern Western Desert.
MARINE AND PETROLEUM GEOLOGY
(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
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
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
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
Geography, Physical
Xuegang Mao, Gregory Retallack, Xiuming Liu
Summary: Paleosols are valuable indicators of ancient climates and environments, and the study on paleosols in Zhangye Danxia National Geopark provides insights into the paleoclimates and paleoenvironments during the Early Cretaceous period. The identification and characterization of 155 sequential paleosol profiles help reconstruct the ancient environments and suggest a hotter and more humid climate compared to the present. The analysis of soil units based on their modern analogues allows for the reconstruction of paleoenvironments in different humidity stages.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Geology
Yi Wang, Stephane Bodin, Jerzy S. Blusztajn, Clemens Ullmann, Sune G. Nielsen
Summary: The ongoing oceanic oxygen loss will have a profound impact on the distribution and density of life on Earth. However, drivers of the initiation and termination of global oceanic deoxygenation are poorly understood. New research reveals that in the mid-Cretaceous, there were three rapid global deoxygenation events that occurred after massive volcanism and were influenced by increased continental weathering under a warmer climate. The interactions of long-term climate change and short-term orbital modulation played a role in the termination of each deoxygenation interval.
Article
Geology
Gamal M. El Qot
Summary: Rich and well-preserved echinoid assemblages were discovered in Aptian-lower Cenomanian sedimentary rocks in northern Sinai, with 32 species identified including a new genus and two new species. Additionally, two species were recorded in Egypt for the first time.
CRETACEOUS RESEARCH
(2021)
Article
Geology
Rilda C. Araripe, David H. Oliveira, Maria E. Tome, Renata Moura de Mello, Alcina M. F. Barreto
Summary: This study investigated the Aptian-lower Albian microfossil association in the Romualdo Formation in the Araripe Basin, northeastern Brazil, identifying nine species of foraminifera and five species of ostracods from various environments. Three assemblages were identified and their stratigraphic position was determined for each outcrop, suggesting different marine influences in the south-central versus southwestern portions of the basin. The presence of the foraminifera genus Agathammina indicates an affinity with the Tethyan fauna, leading to the conclusion that the marine ingression during the Aptian-Albian followed a north-northeast direction, reaching initially the south-central part of the basin.
CRETACEOUS RESEARCH
(2021)
Article
Zoology
Olga Alcantara Barros, Paulo Victor de Oliveira
Summary: This study describes a new fossil shrimp, Somalis piauiensis, from the Araripe Basin. The fossil has a carapace with antennal and branchiostegal spines, as well as a long rostrum with thirteen dorsal spines giving it a serrate appearance. The laminar scaphocerite is large and has a weakly rounded lateral margin, and is longer than the rostrum. This is the first occurrence of a shrimp fossil in the Piaui territory.
Article
Geosciences, Multidisciplinary
Abdulwahab Muhammad Bello, Musa B. Usman, Usman Abubakar, Khalid Al -Ramadan, Lamidi O. Babalola, Abduljamiu O. Amao, Babangida M. Sarki Yandoka, Aliyuda Kachalla, Ibrahim A. Kwami, Muhammad A. Ismail, Umar S. Umar, Adamu Kimayim
Summary: This study focuses on the diagenetic alterations and their impact on the porosity evolution of the Cretaceous Bima Sandstone in NE Nigeria. The results indicate that mechanical compaction and quartz cementation have significantly modified the porosity, while primary depositional features have a smaller impact. The findings of this study are important for reducing exploration risks in fluvial reservoirs.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geology
Marco A. Rubalcava-Knoth, Sergio R. S. Cevallos-Ferriz
Summary: This article describes a new trilobed leaf from the middle Cretaceous period and determines its relationship with extant and fossil plants through comparative analysis. The results demonstrate close morphological similarity between the new fossil plant and Araliaephyllum and Pabiania, confirming their relationship with Laurales.
CRETACEOUS RESEARCH
(2022)
Article
Geography, Physical
Yuting Zhong, Yaqiong Wang, Baoyan Jia, Man Wang, Liang Hu, Yanhong Pan
Summary: The study conducted in the Yanji Basin of Northeast China provides a new chronostratigraphic framework for the transition from Albian to Cenomanian in the terrestrial Cretaceous. The research obtained precise geochronological and biostratigraphic data to pinpoint the terrestrial A-C boundary within the Longjing Formation of the basin.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(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
Kenneth P. Helmold, David L. LePain
Summary: Recent hydrocarbon discoveries in the Nanushuk Formation have sparked interest in exploring the Colville basin in Alaska. The formation consists of marine and nonmarine strata that were deposited by two deltaic complexes. The reservoir quality varies across the North Slope, with differences in porosity and permeability controlled by depositional texture and burial depth.
MARINE AND PETROLEUM GEOLOGY
(2023)