Results 151 to 160 of about 2,993,327 (417)

Palynological and Sequence Stratigraphy Framework of Campanian-Maastrichtian Deposit of Anambra Basin, Awgu Section, Southeast Nigeria

Journal of Applied Sciences and Environmental Management
A combination of palynological and palynofacies data are used as lithological evidence to describe sequence stratigraphic framework. Hence, the objective of this paper as to deploy the palynological and sequence stratigraphy framework of Campanian ...
I. S. Didei, N. E. Ajaegwu
doaj  

Early taphonomy of benthic foraminifera in Storfjorden ‘sea‐ice factory’: the agglutinated/calcareous ratio as a proxy for brine persistence

Boreas, Volume 52, Issue 1, Page 109-123, January 2023., 2023
The recurrent latent‐heat polynya characterizing Storfjorden (Svalbard, Norway) triggers seasonal formation of thin first‐year sea ice. This leads to the production of dense, salty, and corrosive brines that cascade towards the sea floor and mix with shelf waters. The bottom topography of the fjord is responsible for the retention of these dense waters
Maria Pia Nardelli, Eleonora Fossile, Olivier Péron, Hélène Howa, Meryem Mojtahid   +4 more
wiley   +1 more source

Analysis of Phylogeny Tracking Algorithms for Serial and Multiprocess Applications [PDF]

arXiv
Since the advent of modern bioinformatics, the challenging, multifaceted problem of reconstructing phylogenetic history from biological sequences has hatched perennial statistical and algorithmic innovation. Studies of the phylogenetic dynamics of digital, agent-based evolutionary models motivate a peculiar converse question: how to best engineer ...
arxiv  

Ages on weathered Plio-Pleistocene tephra sequences, western North Island, New Zealand [PDF]

, 2001
Using the zircon fission-track method, we have obtained five ages on members of two strongly-weathered silicic, Pliocene-Pleistocene tephra sequences, the Kauroa and Hamilton Ash formations, in western North Island, New Zealand.
Briggs, Roger M., Horrocks, Joanna L., Kamp, Peter J.J., Liddell, Ivan J., Lowe, David J., Tippett, J. Mark   +5 more
core   +1 more source

Hotspots, trends, and regional focus on oil or gas exploration: A bibliometric comparative study

Deep Underground Science and Engineering, EarlyView.
This paper explores the research trends in global oil and gas exploration through the bibliometric analysis of 3460 articles collected from the Web of Science database on oil and gas exploration published from 2013 to 2023. The research hotspots, objects, regional distribution, methods, and evaluation methods of oil and gas exploration are analyzed and
Jihong Wang, Zhongkai Li, Jianguo Wang, Zhiqiang Li   +3 more
wiley   +1 more source

Stratigraphic and geotechnical characterization of regionally extensive and highly competent shallow sand units in the southern North Sea

Boreas, Volume 52, Issue 1, Page 78-98, January 2023., 2023
A detailed stratigraphic and geotechnical investigation of the uppermost 50 m below the sea floor was carried out for parts of the German North Sea sector using combined information from shallow seismic reflection surveys, 50‐m‐long sediment cores and cone penetration tests covering an area of ~150 km2.
Matthias Fleischer, Ayobami Abegunrin, Daniel A. Hepp, Stefan Kreiter, Mark Coughlan, Tobias Mörz   +5 more
wiley   +1 more source

UGIJAR AND CANJAYAR NEOGENE BASINS (SE SPAIN): AN EXAMPLE OF STRIKE-SLIP BASIN EVOLUTION IN TRANSPRESSIVE REGIME

Rivista Italiana di Paleontologia e Stratigrafia, 2017
The present study has been carried out in the eastern part of the Alpujarran corridor (Betic Chain), an E-W trending basin, 80 km long, of Neogene-Quaternary age.
M. BOCCALETTI, R. GELATI, G. MORATTI, G. PAPANI, A. VISMARA SCHILLING   +4 more
doaj   +1 more source

A Guide to Tracking Phylogenies in Parallel and Distributed Agent-based Evolution Models [PDF]

arXiv
Computer simulations are an important tool for studying the mechanics of biological evolution. In particular, in silico work with agent-based models provides an opportunity to collect high-quality records of ancestry relationships among simulated agents. Such phylogenies can provide insight into evolutionary dynamics within these simulations.
arxiv  

An Early Pleistocene interglacial deposit at Pingorsuit, North‐West Greenland

Boreas, Volume 52, Issue 1, Page 27-41, January 2023., 2023
At the Pingorsuit Glacier in North‐West Greenland, an organic‐rich deposit that had recently emerged from the retreating ice cap was discovered at an elevation of 480 m above sea level. This paper reports on macrofossil analyses of a coarse detritus gyttja and peaty soil, which occurred beneath a thin cover of till and glacifluvial deposits.
Ole Bennike, William Colgan, Lars Hedenäs, Oliver Heiri, Geoffrey Lemdahl, Peter Wiberg‐Larsen, Sofia Ribeiro, Roberto Pronzato, Renata Manconi, Anders A. Bjørk   +9 more
wiley   +1 more source

Contributions of climate, vegetation and soil to the alpine sediment carbon accumulation rate in central China since the Middle Holocene

Boreas, Volume 52, Issue 1, Page 99-108, January 2023., 2023
Large amounts of carbon in alpine sediments have been expected to be sensitive to climate change, but how carbon accumulation responds to climate change remains unclear. Thus, we explored the impact of different factors on the carbon accumulation rate (CAR) of alpine sediments by combining a variety of climatic variables, vegetation data and erosion ...
Ying Cheng, Hongyan Liu, Hongya Wang, Qian Hao, Keqin Duan, Zhibao Dong   +5 more
wiley   +1 more source