Results 61 to 70 of about 21,047 (239)

Out in the cold? A review of Early Middle Palaeolithic settlements in northern Central Europe, age data and geological preconditions for site formation and preservation

Boreas, EarlyView.
The characteristics of settlement of Neanderthals in northern Central Europe during the earlier phases of the Middle Palaeolithic (Marine Isotope Stage 8–6) have been a matter of debate for decades, specifically regarding the population dynamics at such latitudes during the coldest phases. In this paper, we review the known archaeological record of the
Gianpiero Di Maida, Jutta Winsemann, Malte Hoffmann, Tobias Lauer, Utz Böhner, Thomas Terberger   +5 more
wiley   +1 more source

Structure and Depositional Environments of the Cenomanian–Coniacian Sequence in Crimea

Russian Journal of Earth Sciences
This paper presents the results of a facies analysis of the Upper Cretaceous deposits in Southwestern and Central Crimea and a characterization of the Cenomanian–Coniacian sequence.
Shishlov Sergey Borisovich, Ivanova V. V., Panova E. G., Dubkova K. A., Kuznecov A. B., Chebotareva V. A.   +5 more
doaj   +1 more source

DISTRIBUTION OF TRACE ELEMENTS IN GROWTH ZONES AND SECTORS OF SPODUMENE CRYSTALS (PASHKI DEPOSIT, NURISTAN, AFGHANISTAN) [PDF]

Минералогия
Regular distribution of several trace elements in spodumene crystals of the Pashki pegmatite Li deposits in Afghanistan (Nuristan province) is analyzed using secondary ion mass spectrometry (SIMS).
M.A. Ivanov, N. Hamdard, S.G. Skublov, V.V. Smolensky   +3 more
doaj   +1 more source

Detrital zircon geochronology of the Grenville/Llano foreland and basal Sauk Sequence in west Texas, USA

, 2014
We thank the University of St. Andrews and Natural Environment Research Council (NERC grant NE/J021822/1) for funding support. The NERC Isotope Geosciences Facilities Steering Committee (IP-1326-0512) provided additional funding support.U-Pb detrital ...
Roberts, Nick M.W., Spencer, Christopher, Roberts, N.M.W., Prave, Anthony R., Cawood, P., Roberts, N.M., Spencer, C.J., Prave, A.R., Cawood, Peter A., Spencer, Christopher J., Cawood, P.A.   +10 more
core   +1 more source

Late Holocene moisture variability in Arctic Alaska from chitin δ18O

Boreas, EarlyView.
Amplified warming in the Arctic has resulted in reduced sea‐ice extent, which can impact regional climate dynamics. Elucidating past moisture variability in response to changing temperatures and sea‐ice conditions can offer insight into how anthropogenic climate change may impact Arctic areas such as the Alaskan North Slope in the future. We contribute
Briana A. Edgerton, Melissa L. Chipman
wiley   +1 more source

An overview of Mass Accumulation Rates in key Polish loess–palaeosol sequences derived from luminescence chronologies

Boreas, EarlyView.
Loess–palaeosol sequences (LPS) represent one of the most important continental archives of late Quaternary environmental change in Europe. Establishing reliable chronologies is essential for reconstructing dust dynamics and for correlating regional loess stratigraphies. In this study, we present the first systematically derived mass accumulation rate (
Maksymilian Jędrzejowski, Zoran M. Perić, Zdzisław Jary, Slobodan Marković, Piotr Moska, Grzegorz Poręba, Agnieszka Szymak, Andrzej Wojtalak   +7 more
wiley   +1 more source

Age of hydrothermal processes in the central iberian zone (Spain) according TO U-Pb dating of cassiterite and apatite

Записки Горного института, 2017
Results of isotope-geochemical studies by PbLS step-leaching method of cassiterite from greisens located in Logrosán granite massif (Central Iberian Zone, Spain) and apatite from hydrothermal quartz-apatite vein on its exocontact indicate that in both ...
N. G. Rizvanova, S. G. Skublov, E. V. Cheremazova   +2 more
doaj   +1 more source

Replication data for: Relative sea-level stability and the radiocarbon marine reservoir correction at Natuna Island, Indonesia, since 6400 yr BP

, 2020
Geochronology data, field notes, field photos, site surveys, GPS waypoints, tidal predictions, and other analysis files supporting the figures and tables in the Marine Geology ...
Meltzner, Aron J., Lin Ke, Natawidjaja, Danny H., Suwargadi, Bambang W., Wang Xianfeng, Horton, Benjamin P., Wan, Jeannette Xiu Wen, Switzer, Adam D., Bradley, Sarah L.   +8 more
core   +1 more source

Assessment and Correction of Non‐Linearity Effects for In Situ Rb‐Sr Geochronology Applied to High 87Rb/86Sr Mica

Geostandards and Geoanalytical Research, EarlyView.
Key Points Measurement of 86Sr at count rates < 1500 cps can result in statistical bias. Non‐linear signals in analogue detection mode (e.g., Rb) present a challenge for accurately dating high 87Rb/86Sr mica (> 1000). Accounting for these considerations, high 87Rb/86Sr mica are dated here with accuracies of ∼ 1%.
Duane C. Petts, William J. Davis, Simon E. Jackson, Jamie A. Cutts, Janina Czas, Alfredo Camacho   +5 more
wiley   +1 more source

Resolving Micrometre‐Scale Zircon Growth in Silicic Systems by 7 μm LA‐MC‐ICP‐MS U‐Pb Dating: Linking Petrology and Geochronology in Silicic Volcanic and Granitic Rocks from Victoria, Australia

Geostandards and Geoanalytical Research, EarlyView.
Key Points 7 μm spot‐diameter LA‐MC‐ICP‐MS analyses yield accurate zircon U‐Pb ages. 1013 Ω amplifier resistors improve low‐signal Pb measurements. Saturn correction protocols minimise down‐hole fractionation effects. We present a systematic evaluation of high spatial‐resolution zircon U‐Pb dating using a Thermo Scientific Neoma multi‐collector ICP‐MS ...
Cristiano Lana, John D. Clemens
wiley   +1 more source