Results 71 to 80 of about 3,202 (214)

Proglacial lake records of Holocene glacier behaviour and catchment processes in Slettedalen, Northeast Greenland

Journal of Quaternary Science, EarlyView.
ABSTRACT Constraining Arctic catchment response to Holocene climate change is vital for understanding future environments. We present detailed sedimentological, geochemical and grain size end‐member analysis of two Holocene (~7.0 ka to present) lake sequences, S1 and S2, close to Zackenberg, Northeast Greenland.
Kathryn Adamson, Matt Carney, Stamatia Galata, Tom Bishop, Timothy Lane, Vikas Mackevicius, Rochelle Taylor   +6 more
wiley   +1 more source

Logging identification of lithology in fine-grained sedimentary rocks based on the FSSA-HKELM model: a case study of the Qingshankou Formation in the Songliao Basin (NE China) [PDF]

Oil Shale
The lithology distribution of fine-grained sedimentary rocks in regional space plays a crucial role in guiding the exploration of oil shale layers. Identifying lithology by conventional logging information is efficient and cost-effective.
Baiqiang Tang, Qingtao Meng, Zhaojun Liu, Fei Hu, Penglin Zhang, Wei Dang, Junxian Wang   +6 more
doaj   +1 more source

The Glacial Legacy of the Geneva Basin: Morphology and implications of an intricate tunnel valley system revealed from 3D seismic data

Journal of Quaternary Science, EarlyView.
ABSTRACT Like other perialpine basins and glaciated margins, the Geneva Basin in SW Switzerland is characterised by buried tunnel valleys, which are elongated incisions widely attributed to subglacial meltwater erosion beneath continental ice sheets. However, an inclusive understanding of the geological control on the evolution of the glacial landscape
Ovie Emmanuel Eruteya, Emna Meftah, Andrea Moscariello   +2 more
wiley   +1 more source

A lightweight model hyperparameters searching method for fast, accurate and on-site lithology identification

Journal of Rock Mechanics and Geotechnical Engineering
The efficiency of tunnel excavation, rock strength, stability of surrounding rock, and underground engineering disasters are closely related to lithology.
Zhenhao Xu, Heng Shi, Peng Lin, Shan Li
doaj   +1 more source

A new, ~4500‐year varve record and high‐resolution tephrochronology from lake Hämälänlampi, eastern Finland, provides age constraints for the Furnas C and the Glen Garry/Askja A‐2000 eruptions

Journal of Quaternary Science, EarlyView.
ABSTRACT The northern European distal cryptotephra framework is constantly developing both in terms of identification of new tephra horizons and improved age constraints for the already well‐established tephra marker horizons. However, many prehistoric tephra layers have only been dated by the radiocarbon method, with its inherent problems.
Maarit Kalliokoski, Veera Erola, Saija Saarni   +2 more
wiley   +1 more source

Identification of Complicated Lithology with Machine Learning

Applied Sciences
Lithology identification is one of the most important research areas in petroleum engineering, including reservoir characterization, formation evaluation, and reservoir modeling.
Liangyu Chen, Lang Hu, Jintao Xin, Qiuyuan Hou, Jianwei Fu, Yonggui Li, Zhi Chen   +6 more
doaj   +1 more source

From Highlands to Henge: Refining the Provenance and Transport Pathways of Stonehenge's Altar Stone

Journal of Quaternary Science, EarlyView.
ABSTRACT The Altar Stone, the 6000 kg central sandstone megalith at Stonehenge in southern England, is suggested to have originated from the Orcadian Basin in northeast Scotland, some 700 km away. However, its source location within this large basin remains unresolved and its mode of transport uncertain.
Anthony J. I. Clarke, Remy L. J. Veness, Christopher L. Kirkland, Chris D. Clark, Niall Gandy, Andy Emery, Sarah L. Bradley, Jeremy C. Ely, Ignéczi Ádám   +8 more
wiley   +1 more source

An Igneous Rock Lithology Identification Method Based on Data-Algorithm Bidirectional-Driven Framework

Cejing jishu
Current igneous rock lithology identification technology faces compounded technical bottlenecks arising from significant disparities between conventional logging responses and lithological sensitivity, challenges in constructing continuous stratigraphic ...
HAN Ruiyi, SONG Xiaoni, WANG Xinru, GUO Yuhang   +3 more
doaj   +1 more source

Late Holocene environmental history of Dojran, Macedonia: Investigating the interplay of imperial dynamics and climatic change

Journal of Quaternary Science, EarlyView.
ABSTRACT This study presents a high‐resolution, multi‐proxy reconstruction of environmental and land‐use change from Lake Dojran over historical times (last 2500 years), combining pollen, biomarkers, radiocarbon dating, Ottoman taxation records and other historical data.
Alessia Masi, Lucrezia Masci, Georgios C. Liakopoulos, Monica Bini, Alexander Francke, Ilaria Isola, Carlo Ricotta, Laura Sadori, Alexander Sarantis, Sławomir Sprawski, Jakub Sypiański, Irene Tunno, Cristiano Vignola, Bernd Wagner, Giovanni Zanchetta, Adam Izdebski   +15 more
wiley   +1 more source

Lithology identification technology of seismic measurement while drilling based on EEMD and DE-PNN

Meitan xuebao
In view of the lithology identification technology problems encountered by mine drilling rigs in the process of drilling construction, a lithology identification method based on Ensemble Empirical Mode Decomposition (EEMD) and Product Neural Networks ...
Jinsuo LIU, Pingsong ZHANG, Shengdong LIU, Xiongwu HU, Weixin ZHANG, Huizhou LIU, Yu CAO   +6 more
doaj   +1 more source