Article
Geosciences, Multidisciplinary
M. A. Quasim, Nurul Absar, B. P. Singh, Faiz Ahmad, M. Ashok
Summary: In this study, the major, trace, and rare earth element compositions of the Bijaigarh Shale (BS) were analyzed to infer the composition, weathering history, and tectonic setting of the Mesoproterozoic continental crust. The BS consists of quartz, smectite, kaolinite, and illite, with occasional framboidal pyrites. The high chemical index of alteration (CIA) and plagioclase index of alteration (PIA) values, along with the depletion of certain elements, suggest intense chemical weathering in a warm and humid climate. The REE patterns and immobile element ratios indicate a felsic provenance, with insignificant recycling. The source area is estimated to consist of various granite types and Porcellanite.
JOURNAL OF EARTH SYSTEM SCIENCE
(2023)
Article
Geography, Physical
Stephen Kershaw
Summary: Stromatoporoids in Silurian shallow marine limestones from Gotland are commonly symbiotic with syringoporid tabulates, rugose corals, shelly tubes, and bioclaustrations. The occurrence of different symbionts in different facies suggests that specific taxonomic relationships are influenced by suitable substrates and biological factors. The growth patterns and interruption events of stromatoporoids and symbionts demonstrate complex controls on growth and unlikely enhancement of reef growth by symbionts.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Geosciences, Multidisciplinary
G. Mageswarii, Meenal Mishra, Jaya Prakash Shrivastava
Summary: By studying the petrological and geochemical characteristics of the bimodal volcanics in the lower part of the Vindhyan Basin, it is found that there are strong indications of crustal contamination in these rocks, suggesting that they may have originated from depleted mantle sources but mixed with crustal components.
GEOLOGICAL JOURNAL
(2021)
Article
Geosciences, Multidisciplinary
Shinjana Sen, Meenal Mishra
Summary: This study investigated the heavy mineral assemblage of sandstones from the Kaimur Group in the eastern Son valley, Central India. The results showed a decreasing trend in the transparent heavies and an increasing trend in the opaque heavies. The transparent heavies exhibited a decreasing trend in tourmaline content and an increasing trend in zircon content. The heavy fraction of the Upper Kaimur sandstone showed enrichment in heavy rare earth elements and suggested zircon as the major contributor to the REE budget.
JOURNAL OF EARTH SYSTEM SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Ambar Solanki, Vikram Gupta
Summary: This study examines the erosion and landsliding phenomenon in the Kumaun Himalaya region using morphometric analysis and statistical methods, providing insights into potentially active zones for slope failures through quantitative geomorphometry.
Article
Geosciences, Multidisciplinary
Harshit Varshney, Biplab Bhattacharya
Summary: The Late Palaeozoic glaciation in the Talchir Formation in central India is characterized by evidence of glacial tillites, post-glacial marine incursions, and deep basin sedimentation. These features indicate multiple cycles of glacier advance and retreat, as well as significant marine onlaps during the icehouse-greenhouse climatic change.
GEOLOGICAL JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Ujjal Deka Baruah, Anup Saikia, Scott M. Robeson, Nitashree Mili, Pritam Chand
Summary: The study analyzed climate trends and farmer attitudes in the upper Brahmaputra valley zone (UBVZ) of India from 1971 to 2007. It found that summer rainfall decreased and annual mean temperature increased in the UBVZ during this period. Farmers' perceptions of climate change closely matched climate data, and those with better access to resources were more likely to adapt to climate change.
ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY
(2021)
Article
Multidisciplinary Sciences
Jongyun Jung, Min Huh, David M. Unwin, Robert S. H. Smyth, Koo-Geun Hwang, Hyun-Joo Kim, Byung-Do Choi, Lida Xing
Summary: This study describes a new pterosaur footprint assemblage discovered in the Upper Cretaceous Jangdong Formation of the Neungju Basin in Korea. The assemblage contains randomly oriented prints of the same ichnotaxon, Pteraichnus, with high densities. Some of the individuals have a wingspan estimated at 0.5 m, making them among the smallest pterosaurs known from the Upper Cretaceous. The footprints exhibit unusual features that do not match any known Cretaceous pterosaur, suggesting the possibility of an undiscovered species. The presence of footprints from individuals of different ages at the same location hints at gregarious behavior in pterosaurs.
SCIENTIFIC REPORTS
(2022)
Article
Multidisciplinary Sciences
Kuladip Sarma, Malabika Kakati Saikia, Bidyut Sarania, Himolin Basumatary, Siddhartha Sankar Baruah, Bhrigu Prasad Saikia, Awadhesh Kumar, Prasanta Kumar Saikia
Summary: This study used the maximum entropy algorithm to predict the potential habitat of Western Hoolock Gibbon in the upper Brahmaputra River Valley, Assam, India, considering canopy cover. By analyzing 19 environmental parameters, the model predicted a high potential habitat area of 6025 km(2) for the species, with major portions overlapping dense forest, moderately open forest, and open forest. The study also identified a 640 km(2) conservation priority area to protect a minimum of 10% of the gibbon habitat, revealing that most areas with dense forest and canopy in the upper Brahmaputra Valley have remained intact over the last two decades.
SCIENTIFIC REPORTS
(2021)
Article
Geography, Physical
Pinkey Bisht, Ashish Rawat
Summary: The Yankti Kuti valley in northern India has experienced multiple glacier advances since Marine Isotopic Stage 3 (MIS 3), with the oldest advance dated to 52 ka and the most recent advance to 4.3 ka. The study suggests a regional synchronicity of glacier response to climate variability since MIS 3.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Geography, Physical
Ewa Olempska, Blazej Blazejowski, Dieter Waloszek, Andreas Maas
Summary: The Furongian Slowi ' nska Formation in Poland has yielded well-preserved phosphatic fossils consisting of two distinct types - sinuously folded, coiled or spiral string-shaped coprolites and collapsed and deformed eggs or embryos. The coprolites are exceptionally complex, with multiple loops, suggesting a continuous production of faecal material. The high phosphate content indicates an organic-rich muddy bottom, and the producers of these coprolites may have been benthic worms. The second type of fossils are smooth-surfaced ellipsoidal to spherical forms, interpreted as eggs of phosphatocopid crustaceans, which are the most abundant fossils in the area.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Geography, Physical
Jiachun Li, Zuoyu Sun, Gilles Cuny, Dayong Jiang
Summary: This paper presents a taxonomic study on the diverse chondrichthyan fauna from the Luolou Formation in South China. The study recognizes nine different taxa of sharks, indicating a high diversity and evenness in the shark palaeocommunity. The diverse morphologies of the sharks suggest adaptation to various feeding strategies.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Biodiversity Conservation
Anusuya Chinsamy, Trevor H. Worthy
Summary: The histological analysis of Genyornis bones revealed that this species took more than a year to reach sexual maturity, and deposition of bone within the OCL continued for several years afterward until skeletal maturity was attained. The study also found that Genyornis responded to prevailing environmental conditions, indicating a plesiomorphic, flexible growth strategy. Additionally, analyses showed that the tibiotarsus preserved the best record of growth for Genyornis.
Article
Geosciences, Multidisciplinary
Gurmeet Kaur, Swtantra Kumar Singh, Prabhakar Upadhyay, Parminder Kaur, Jaspreet Saini, Alok Kumar Pandey, Meenal Mishra
Summary: The Eastern Son valley of India is a geographically unique region with rich geological resources and diverse natural landscapes, as well as significant cultural and historical heritage.
Article
Geography, Physical
R. P. Jakhmola, Chinmay Dash, Seema Singh, Narendra K. Patel, Aditya K. Verma, Pitambar Pati, A. K. Awasthi, J. N. Sarma
Summary: This study examines the geomorphic evolution of the Brahmaputra River basin, identifying four stages of landform development influenced by neotectonics and climate change. The study also categorizes the soils in the region and provides insights into the sedimentation and erosion processes since the Neogene period.
QUATERNARY SCIENCE REVIEWS
(2023)
