Results 11 to 20 of about 208,933 (390)

Dielectric properties and stratigraphy of regolith in the lunar South Pole-Aitken basin: Observations from the Lunar Penetrating Radar [PDF]

A&A 661, A47 (2022), 2022
We examine data obtained by the Lunar Penetrating Radar (LPR) onboard the Chang'E-4 (CE-4) mission to study the dielectric properties and stratigraphy of lunar regolith on the far side of the Moon. The data collected from January 2019 to September 2020 were processed to generate a 540 m radargram.
arxiv   +1 more source

Structural and technical characteristics of the fortification system of the Dikaya Yama hillfort of the Early Iron Age in the Middle Tobol River area [PDF]

Вестник археологии, антропологии и этнографии, 2021
The paper reports the results of the studies of the fortification system of the Early Iron Age Dikaya Yama hillfort situated in the Middle Tobol River region of the Western Siberian forest-steppe zone.
Berlina S.V. , Tsembalyuk S.I., Yakimov A.S.   +2 more
doaj   +1 more source

Late Tremadocian (Early Ordovician) reefs on the Yangtze Platform, South China, and their geobiological implications: a synthesis

Journal of Palaeogeography, 2021
This study provides an overview and discussion of controls on the distribution of organic reefs during the Early Ordovican Period, in the Yangtze Platform, a region of epicontinental sedimentary rocks in South China.
Jian-Po Wang, Qi-Jian Li, Stephen Kershaw, Yuan-Yuan Zhang, Shen-Yang Yu, Yue Li   +5 more
doaj   +1 more source

The Severe 2013–14 Winter Storms in the Historical Evolution of Cantabrian (Northern Spain) Beach-Dune Systems

Geosciences, 2018
The 2013⁻14 winter storms were the most energetic storms in the European Atlantic on record since at least 1948. They caused intense erosive processes along the coast, similar to those described previously in places such as the United Kingdom and ...
Julio Garrote, Aurora Díaz-Álvarez, Hélio V. Nganhane, Guillermina Garzón Heydt   +3 more
doaj   +1 more source

Chemostratigraphy of Neoproterozoic carbonates: implications for 'blind dating' [PDF]

, 2001
The delta C-13(carb) and Sr-87/Sr-86 secular variations in Neoproteozoic seawater have been used for the purpose of 'isotope stratigraphy' but there are a number of problems that can preclude its routine use.
Aharon P., Anthony E. Fallick, Anton B. Kuznetsov, Bowring S.A., Brand U., Brasier M.D., Brasier M.D., Brasier M.D., Burns S.J., Calver C.R., Corsetti F.A., Fairchild I.J., Fairchild I.J., Gao G., Gorokhov I.M., Gorokhov I.M., Gorokhov I.M., Grotzinger J.P., Grotzinger J.P., Hoffman P.F., Igor M. Gorokhov, Kaufman A.J., Kennedy M.J., Kirschvink J.L., Knoll A.H., Knoll A.H., Knoll A.H., Kupecz J.A., Kuznetsov A.B., Kuznetsov A.B., Lambert I.B., Magaritz M., McArthur J.M., McArthur J.M., McCulloch M.T., Melezhik V.A., Morton J.P., Ovchinnikova G.V., Pelechaty S.M., Podkovyrov V.N., Pokrovsky B.G., Pokrovsky B.G., Pokrovsky B.G., Saylor B.Z., Semikhatov M.A., Singh U., Smith L.H., Tronnes R.G., Tucker M.E., Tucker M.E., Veizer J., Veizer J., Victor A. Melezhik, Wada S.-I., Walter M.R., Wang Da-Rui   +55 more
core   +1 more source

Sequence Stratigraphy towards its standardization—an important scientific scheme [PDF]

E3S Web of Conferences, 2019
In the Post-Exxon Era of sequence stratigraphy, various sequence models for the complex stratigraphic records with their response mechanisms are developed. All the models with strong pertinence are endowed, which lead to misapprehension in the conceptual
Wu Heyuan, Khan Muneeb, Song Ping
doaj   +1 more source

Hunger sweetens the beans: evidence of opportunistic feeding behaviour of the little owl (Athene noctua, Scopoli 1769) from Peloponnese, Greece

Raptor Journal, 2022
The little owl (Athene noctua) is a common raptor in Mediterranean habitats. To acquire more information on its diet, this study identified cranial and post-cranial skeletal material from 70 owl pellets collected during the 2016 and 2017 breeding seasons.
Kolendrianou Maria, Mitsainas George P., Tzortzakaki Olga, Katsiyiannis Philippos, Vythoulkas Theodoros, Patrou Myriam, Iliopoulos George   +6 more
doaj   +1 more source

Stratigraphy of the Anthropocene

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2011
The Anthropocene, an informal term used to signal the impact of collective human activity on biological, physical and chemical processes on the Earth system, is assessed using stratigraphic criteria. It is complex in time, space and process, and may be considered in terms of the scale, relative timing, duration and novelty of its various phenomena. The
F. J. Gregory, Michael Oates, Tiffany L. Barry, Andrew C. Kerr, John E. A. Marshall, Jan Zalasiewicz, Mark Williams, John H. Powell, Richard A. Fortey, Philip L. Gibbard, Colin N. Waters, Peter F. Rawson, Peter F. Rawson, Robert Knox, Paul R. Bown, Mark W. Hounslow, Angela L. Coe, Philip Stone, Andrew S. Gale, Paul Nicholas Pearson, Alan Smith   +20 more
openaire   +7 more sources

Direct multi-modal inversion of geophysical logs using deep learning [PDF]

Earth and Space Science, 9, e2021EA002186 (2022), 2021
Geosteering of wells requires fast interpretation of geophysical logs, which is a non-unique inverse problem. Current work presents a proof-of-concept approach to multi-modal probabilistic inversion of logs using a single evaluation of an artificial deep neural network (DNN).
arxiv   +1 more source

Flow dynamics of an accumulation basin: a case study of upper Kahiltna Glacier, Mount McKinley, Alaska [PDF]

, 2012
We interpreted flow dynamics of the Kahiltna Pass Basin accumulation zone on Mount McKinley, Alaska, USA, using 40, 100 and 900 MHz ground-penetrating radar profiles and GPS surface velocity measurements.
Arcone, Steven, Campbell, Seth, Kreutz, K, Osterberg, Erich, Volkening, Kevin, Wake, Cameron P, Winski, Dominic   +6 more
core   +2 more sources