Results 21 to 30 of about 20,360 (229)

No Cretaceous‐Paleogene Boundary in Exposed Rajahmundry Traps: A Refined Chronology of the Longest Deccan Lava Flows From 40Ar/39Ar Dates, Magnetostratigraphy, and Biostratigraphy

Geochemistry, Geophysics, Geosystems, 2020
Deccan Traps flood basalt volcanism affected ecosystems spanning the end‐Cretaceous mass extinction, with the most significant environmental effects hypothesized to be a consequence of the largest eruptions.
Isabel M. Fendley, Courtney J. Sprain, Paul R. Renne, Ignacio Arenillas, José A. Arz, Vicente Gilabert, Stephen Self, Loÿc Vanderkluysen, Kanchan Pande, Jan Smit, Tushar Mittal   +10 more
doaj   +1 more source

Emplacement of inflated Pāhoehoe flows in the Naude’s Nek Pass, Lesotho remnant, Karoo continental flood basalt province: use of flow-lobe tumuli in understanding flood basalt emplacement [PDF]

, 2018
Physical volcanological features are presented for a 710-m-thick section, of the Naude’s Nek Pass, within the lower part of the Lesotho remnant of the Karoo Large Igneous Province.
A Saunders, AE Jay, Anne E. Jay, BE Lock, BL Waichel, CP Rajendran, F Goff, F Holzförster, F Jourdan, Frédéric Fluteau, GPL Walker, GPL Walker, GPL Walker, H Hachimi El, H Svensen, HB Mattsson, HC Sheth, JD Greenough, JE Beane, JS Marsh, JSV Zijl van, Julian S. Marsh, K Burke, KA Hon, KB Knight, KG Cox, KG Cox, LG Viereck, M McClintock, M McClintock, M Moulin, M Moulin, ME Hartley, MJ Rossi, MK Reichow, MRG Sayyed, NR Bondre, NR Bondre, P-SS Ross, PB Wignall, PB Wignall, R Ernst, RA Duncan, RA Duraiswami, RA Duraiswami, RA Duraiswami, RA Duraiswami, RMH Smith, S Self, S Self, SE Bryan, SR Passey, SS Deshmukh, SW Anderson, T Thordarson, VE Camp, Vincent Courtillot, W Rogan   +57 more
core   +5 more sources

Constraints on the Magma Source and Rift Evolution From Geochemistry of the Stratoid Flood Basalts (Afar, Ethiopia)

Geochemistry, Geophysics, Geosystems, 2022
The relationship between rifting and continental flood basalt eruptions is debated, and a control by mantle plume is commonly invoked for flood basalts production.
G. Tortelli, A. Gioncada, C. Pagli, E. Braschi, E. F. Gebru, D. Keir   +5 more
doaj   +1 more source

The Discovery and Geochemical Characteristics of an Eocene Peridotite Xenolith-Bearing Mafic Volcanic Neck in Coastal Southeast China

Frontiers in Earth Science, 2022
The mantle beneath coastal SE China evolved from enriched to depleted between the Cretaceous and the Neogene, although the precise timing of this change remains unclear.
Chuanshun Li, Xilin Zhao, Xilin Zhao, Xilin Zhao, Yang Jiang, Guangfu Xing, Minggang Yu, Zheng Duan   +7 more
doaj   +1 more source

Fossil trees, tree moulds and tree casts in the Palaeocene Mull Lava Field, NW Scotland: context, formation and implications for lava emplacement [PDF]

, 2016
Megafossils and macrofossils of terrestrial plants (trees, leaves, fruiting bodies, etc.) are found in sedimentary and pyroclastic units interbedded with lavas in many ancient lava fields worldwide, attesting to subaerial environments of eruption and the
Bell, Brian R., Williamson, Ian T.
core   +1 more source

Formation of Box Canyon, Idaho, by megaflood: implications for seepage erosion on Earth and Mars [PDF]

, 2008
Amphitheater- headed canyons have been used as diagnostic indicators of erosion by groundwater seepage, which has important implications for landscape evolution on Earth and astrobiology on Mars.
Aciego, Sarah M., DePaolo, Donald J., Dietrich, William E., Lamb, Michael P., Manga, Michael   +4 more
core   +2 more sources

Frictional Instabilities and Carbonation of Basalts Triggered by Injection of Pressurized H2O- and CO2- Rich Fluids [PDF]

, 2018
The safe application of geological carbon storage depends also on the seismic hazard associated with fluid injection. In this regard, we performed friction experiments using a rotary shear apparatus on precut basalts with variable degree of hydrothermal ...
Andrea, Marzoli, Elena, Spagnuolo, Francois, Passelegue, Giacomel, Piercarlo, Giulio Di Toro,, Nasrrddine, Youbi, Nazzari, Manuela   +6 more
core   +1 more source

Multivariate analysis of elements from the microhabitats of selected plateaus in the Western Ghats, Maharashtra, India

Journal of Threatened Taxa, 2019
The Western Ghats represents a small part of the Deccan Traps continental flood basalt province that erupted about 65 million years ago.  It is an area of outstanding scenic beauty and has attracted the attention of geologists, naturalists and ...
Priti Vinayak Aphale, Dhananjay Chintaman Meshram, Dnyaneshwar Maruti Mahajan, Prasad Anil Kulkarni, Shraddha Prasad Kulkarni   +4 more
doaj   +1 more source

Multiscale Spatial Patterns in Giant Dike Swarms Identified Through Objective Feature Extraction

Geochemistry, Geophysics, Geosystems, 2023
Dike swarms are ubiquitous on terrestrial planets and represent the frozen remnants of magma transport networks. However, spatial complexity, protracted emplacement history, and uneven surface exposure typically make it difficult to quantify patterns in ...
A. Kubo Hutchison, L. Karlstrom, T. Mittal   +2 more
doaj   +1 more source

Basement structure of the northern Ontong Java Plateau [PDF]

, 1993
Site surveys conducted in conjunction with Leg 130 on the Ontong Java Plateau reveal a strong seismic reflector at 0.8 to 1.0 s below the seafloor that drilling at Sites 803 and 807 confirmed is Cretaceous basalt.
Hagen, Rick A., Kroenke, Loren w., Mayer, Larry A., Mosher, David, Shipley, Tom H., Winterer, Edward L.   +5 more
core   +2 more sources