Results 71 to 80 of about 200,597 (344)

Stratigraphy of Tithonian (Ohauan-Puaroan ) marine beds near Port Waikato, New Zealand, and a redescription of Belemnopsis aucklandica (Hochstetter). [PDF]

open access: yes, 2001
Some 1500 m of marine Ohauan and Puaroan strata in the Port Waikato region of New Zealand are restudied in an attempt to resolve lithostratigraphic and biostratigraphic anomalies in published works.
Challinor, A.B.
core   +2 more sources

Failure mechanism of the coal wall at the working face based on an eccentric compression mechanical model

open access: yesDeep Underground Science and Engineering, EarlyView.
In this study, the nonuniform distribution of the bearing pressure in front of the coal wall has been revealed based on in situ monitoring data and numerical simulation results. Therefore, an eccentric compression mechanical model of the coal wall was established to study the deformation and failure characteristics of a coal wall. The slenderness ratio
Maolin Tian   +6 more
wiley   +1 more source

An analytical comparison of two commercial consolidating products applied to eocene sandstones from 16th and 19th century monuments in San Sehastián, northern Spain

open access: yesMateriales de Construccion, 2002
The conservation of buildings in the Basque Country made of Eocene sandstone is somewhat problematical, because this type of rock is relatively unstable.
F. García-Garmilla   +6 more
doaj   +1 more source

Macro/Microtesting and Damage and Degradation of Sandstones under Dry-Wet Cycles

open access: yes, 2016
In terms of the degradation of mechanical parameters of rock mass in the hydrofluctuation belt of a reservoir bank slope arising from rainfall and the reservoir level fluctuation, the moderately weathered sandstone in a side slope of the Three Gorges ...
Xinrong Liu   +4 more
semanticscholar   +1 more source

Emplacement of sandstone intrusions during contractional tectonics [PDF]

open access: yes, 2016
Acknowledgments We acknowledge the support of sponsoring companies of Phase 3 of the Sand Injection Research Group (SIRG). We are very grateful to John Waldron and Jessica Ross for the constructive reviews of the manuscript.
Alsop, G. Ian   +4 more
core   +1 more source

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

open access: yesDeep 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   +3 more
wiley   +1 more source

Application of micro‐CT to resolve textural properties and assess primary sedimentary structures of deep‐marine sandstones

open access: yesThe Depositional Record
Over the past decade, there has been growing interest in the sedimentological community to use micro X‐ray computed tomography to analyse microfacies in sediment cores.
P. H. Cornard   +4 more
doaj   +1 more source

The U10 0 reservoir is a promising oil and gas exploration facility in the Serginsky NGR of the West Siberian NGP

open access: yesИзвестия высших учебных заведений: Нефть и газ
Currently, oil deposits in the Lower Jurassic strata of the Serginskoye oil and gas region have been identified in several fields, including the Serginskoye, Alekseyevskoye, Zapadno-Yaganokurt, Bolshoye, Karempostskoye, and Yuzhno-Lykhminskoye fields ...
A. V. Blinkova   +4 more
doaj   +1 more source

Prismatic Sandstone from Missouri

open access: yesScience, 1892
On the right bank of the St. Francois River, in S.31; T.33, N.; R. 6. E., about 200 yards southwest of the St. Louis Granite Company's quarry, near Knob Lick, Madison County, Mo., is a little sandstone ridge, trending northwest and southeast, nearly 200 yards long, 10 yards wide, and not more than 8 to 10 feet high above the nearly level ground on ...
openaire   +3 more sources

Assessing the potential for reopening a building stone quarry : Newbigging Sandstone Quarry, Fife [PDF]

open access: yes, 2009
Newbigging Sandstone Quarry in Fife is one of a number of former quarries in the Burntisland- Aberdour district which exploited the pale-coloured Grange Sandstone from Lower Carboniferous rocks.
Albornoz-Parra, Luis J.   +2 more
core  

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