Results 81 to 90 of about 16,262 (232)

The Earth's Worst Climate Disaster [PDF]

, 2004
Scientists, environmentalists, and the wiser members of the political class worry today about global climate change. Will rising tides plunge Tokyo, London, and New York beneath the ocean’s waves?
Kirschvink, Joseph L., Kopp, Robert E.
core  

U-Pb and Hf isotopic study of detrital zircons from the Wulashan khondalites: Constraints on the evolution of the Ordos Terrane, Western Block of the North China Craton [PDF]

, 2006
Detrital zircons from the Wulashan khondalites in the Ordos Terrane, western block of the North China Craton, give U-Pb ages between 1.84 and 2.32 Ga, showing that their provenance was dominated by Paleoproterozoic rocks, much younger than those exposed ...
Luo, Y, Sun, M, Wu, F, Xia, X, Xu, P, Zhang, J, Zhao, G   +6 more
core   +1 more source

Quantifying Water Diffusivity and Metamorphic Reaction Rates Within Mountain Belts, and Their Implications for the Rheology of Cratons

Geochemistry, Geophysics, Geosystems, 2021
The distribution of rheologically strong cratons, and their weakening by metamorphic hydration reactions, is of fundamental importance for understanding first‐order strength contrasts within the crust and the resulting controls on the tectonic evolution ...
A. J. Whyte, O. M. Weller, A. C. Copley, M. R. St‐Onge   +3 more
doaj   +1 more source

Channel morphology and large wood control postfire debris‐flow erosion and deposition

Earth Surface Processes and Landforms, Volume 51, Issue 4, April 2026.
Key Points Debris flows can preferentially deposit in areas where there is a spatial and temporal change in the entrenchment ratio of the channel. Wood dams and jams can both retain debris‐flow sediment, encouraging deposition, and cause downstream erosion if they breach.
Francis K. Rengers, Jason M. Stoker, Jaime Kostelnik, Jason W. Kean, Ellen E. Wohl, Katherine R. Barnhart, Lauren E. Guido   +6 more
wiley   +1 more source

The Termination and Aftermath of the Lomagundi-Jatuli Carbon Isotope Excursions in the Paleoproterozoic Hutuo Group, North China [PDF]

, 2015
The Lomagundi-Jatuli Event (LJE) is one of the largest and earliest positive carbon isotope excursions preserving δ13Ccarb values between +5 and +16‰ in Paleoproterozoic carbonates worldwide.
Li, C, Liu, W, Papineau, D, She, Z, Wan, Y, Xie, L, Yang, F   +6 more
core   +1 more source

AGE AND PETROGENESIS OF DOLERITES ON THE MARA RIVER (SAYAN MARGINAL UPLIFT OF THE BASEMENT, SOUTHERN PART OF THE SIBERIAN CRATON)

Геодинамика и тектонофизика
This work focuses on petrological-and-geochemical features, as well as age of dolerites widespread within the basins of the Mara, Kamenka and Uvat rivers.
I. А. Izbrodin, А. G. Doroshkevich, А. B. Kotov, Е. B. Salnikova, А. E. Izokh, Е. F. Letnikova, А. V. Ivanov   +6 more
doaj   +1 more source

Dating the Sedimentary Protolith of the Daldyn Group Quartzite, Anabar Shield, Russia: New Detrital Zircon Constraints

Geosciences, 2020
Quartzites and paragneisses of the Archean granulite series of the Anabar Shield (Siberian Craton, Russia) are described geochemically. The Sm-Nd isotope systematics of the rocks and the U-Pb age (SHRIMP II) and geochemistry of zircons from quartzites ...
Nikolay I. Gusev, Lyudmila Yu. Sergeeva, Sergey G. Skublov   +2 more
doaj   +1 more source

Climax of Late Paleoproterozoic Rift‐Related Magmatism in the Columbia Supercontinent: Insights From a 1.77–1.76 Ga Large Igneous Province of the Dunhuang Block, Northwest China

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 4, April 2026.
Abstract Widespread mafic magmatism at ca. 1.8–1.7 Ga across fragments of the Columbia supercontinent records a transition in the Earth's supercontinent cycle. The paleogeographic position of the Dunhuang Block in northwestern China within Columbia, and its role in this tectonic reorganization, remain controversial.
Masumeh Sargazi, Chuan‐Lin Zhang, Xian‐Tao Ye, Zhi‐Hao Song, Hong‐Ran Wang   +4 more
wiley   +1 more source

Two-billion-year-old evaporites capture Earth's great oxidation [PDF]

, 2018
Funding sources: Simons Foundation (SCOL 339006 to C.L.B.), European Research Council (ERC Horizon 2020 grant 678812 to M.C.), Research Council of Norway (RCN Centres of Excellence funding scheme project 223259 to K.P. and A.L.), Estonian Science Agency (
Bao, H., Blättler, Clara, Claire, Mark, Hayles, J. A., Higgins, J. A., Kirsimäe, K., Kreitsmann, T., Lepland, A., Medvedev, P. V., Millar, I. L., Paiste, K., Prave, Anthony Robert, Romashkin, A. E., Rychanchik, D. V., Turchyn, A. V., Warke, Matthew Robert, Zerkle, Aubrey Lea   +16 more
core   +4 more sources

Northeastern Greenland Paleomagnetic Records Indicate the Influence of Geomagnetic Flux Lobe Intensity on Virtual Geomagnetic Pole Migration During the Holocene

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract Paleomagnetic and rock magnetic analyses were conducted on sediment cores from the northeastern Greenland Shelf and Young Sound along the western edge of Fram Strait. The paleomagnetic signal in all three sediment cores is characterized by a strong and stable single component magnetization carried by low coercivity ferrimagnetic single domain ...
Juliette Girard, Guillaume St‐Onge, Christof Pearce, France Lagroix, Marit‐Solveig Seidenkrantz, Katrine Juul Andresen, Jean‐Carlos Montero‐Serrano, Pierre Francus   +7 more
wiley   +1 more source