Results 61 to 70 of about 60,917 (227)

Confirmation of the impact origin of the Late Ordovician Tvären impact structure (southeast Sweden) and emplacement of impactites in a marine setting

Meteoritics &Planetary Science, EarlyView.
Abstract The Tvären structure in southeastern Sweden has been listed as a confirmed marine‐target impact structure for decades. However, to date, no measurements and/or indexed data of planar deformation features in quartz grains from the structure have been published or any other unequivocal evidence of impact.
Katarzyna J. Gajewska, Sanna Alwmark, Mikael Calner, Sylvain Richoz, Jens Ormö, Erik Sturkell, Carl Alwmark   +6 more
wiley   +1 more source

Correlation of the supracrustal complexes of the Small and Large Keivy, North-East of the Baltic Shield

Vestnik MGTU
The issue of correlation between the Small and Large Keivy sections is considered using a technique that includes searching for trends in partially ordered sets of random variables and assessing the degree of similarity/difference between rock ...
Kozlov N. E., Sorokhtin N. O., Mudruk S. V.   +2 more
doaj   +1 more source

STABLE ISOTOPES (δ18O, δ13C, δ34S) IN ORES FROM THE KOPYLOVSKOE, KAVKAZ AND KRASNOE GOLD DEPOSITS (BODAIBO REGION) [PDF]

Минералогия
The article presents data on isotopic composition of oxygen of vein quartz and carbonates, carbon of carbonates, and sulfur of sulfides of the Kopylovskoe, Kavkaz and Krasnoe gold deposits located within the Baikal-Patom Highland in the Ediacaran ...
E.E. Palenova, S.A. Sadykov
doaj   +1 more source

Restoring soil and tree nutrition through non‐industrial wood ash additions to sugarbushes

Restoration Ecology, EarlyView.
Nutrient losses from forest soils caused by decades of acid deposition have affected tree growth and depleted soils of essential nutrients in eastern North America. Non‐industrial wood ash (NIWA) is rich in macronutrients and may be a potential remediation strategy to restore lost nutrients as a forest soil amendment.
Shelby M. Conquer, Batool S. Syeda, Norman D. Yan, Shaun A. Watmough   +3 more
wiley   +1 more source

Microbial mats in dinosaur ichnocoenoses

Sedimentology, EarlyView.
ABSTRACT Until now, the significance of microbial mats in preservation of dinosaur tracks and in reconstructing the palaeoenvironment in which dinosaurs roamed was rarely studied. Dinosaur tracks are commonly found close to ancient aquatic bodies where moist sediment had once allowed footstep registration.
Nora Noffke, Paul C. Murphey, Roger C. Buntin, Martin G. Lockley   +3 more
wiley   +1 more source

The carbon release triggered by 1.32 Ga sill emplacement and its potential environmental implications

Frontiers in Earth Science
Magmatic activity is one of the important pathways for the delivery of deep Earth carbon to the surface. The massive carbon release in this process can have significant impacts on atmospheric-oceanic environment.
Chaokun Zhang, Chaokun Zhang, Wei Tian, Wei Tian, Yanxin He, Yanxin He, Mingyue Gong, Shun Li   +7 more
doaj   +1 more source

Structural geology of the African rift system: Summary of new data from ERTS-1 imagery [PDF]

ERTS imagery reveals for the first time the structural pattern of the African rift system as a whole. The strong influence of Precambrian structures on this pattern is clearly evident, especially along zones of cataclastic deformation, but the rift ...
Mohr, P. A.
core   +1 more source

Microbial mats and thalassinid shrimp: Spatial and geochemical interactions in a modern intertidal environment

Sedimentology, EarlyView.
ABSTRACT This research examines the spatial and geochemical interactions between mat‐forming microorganisms and thalassinid shrimp in an intertidal flat situated on the shores of Willapa Bay, Washington, USA. The study serves as a contemporary analog for the relationships between mats and burrowing organisms in deep time.
Brette S. Harris, Sara K. Biddle, Maya T. LaGrange, Scott Melnyk, Cody N. Lazowski, Jenifer S. Spence, Daniel Alessi, Jeffrey Kavanaugh, Kurt O. Konhauser, Murray K. Gingras   +9 more
wiley   +1 more source

The making of pure quartzose sand in continental interiors: Paraná River (Brazil and Argentina)

Sedimentology, EarlyView.
ABSTRACT As part of a comprehensive project on sedimentary processes in South America, this study focuses on sediment generation in the intracratonic Paraná Basin and monitors the evolution of sand composition along the Paraná River from central Brazil to the Río de la Plata estuary in Argentina.
Eduardo Garzanti, Marta Barbarano, Mara Limonta, Guido Pastore, Pieter Vermeesch, Giovanni Vezzoli   +5 more
wiley   +1 more source

Deep structure of the Baringo Rift Basin (central Kenya) from three-dimensional magnetotelluric imaging: Implications for rift evolution [PDF]

, 2000
Three-dimensional modeling of data from 31 vertical electrical and 24 magnetotelluric soundings collected in the Baringo-Bogoria Basin (central Kenya Rift Valley) shows a thick succession of well-defined tectonostratigraphic units beneath the Recent ...
Achauer, Andrews, Beer, Beer, Bernard Le Gall, Bishop, Bosworth, Caroline Le Turdu, Chapman, Chapman, Chave, Clark, Counil, Deino, Fisher, Griffiths, Grimaud, Groom, Hautot, Hay, Hill, Jean-Jacques Tiercelin, Jiracek, Kathy Whaler, King, KRISP Working Party, Ku, La Torraca, Le Gall, Le Turdu, Mackie, Mackie, Mackie, Maguire, McConnell, Morley, Morley, Mugisha, Nicol, Nolasco, Pascal Tarits, Pickford, Renaut, Richert, Ritter, Rooney, Smith, Smith, Sophie Hautot, Swain, Swain, Swain, Tiercelin, Tiercelin, Tongue, Williams   +55 more
core   +2 more sources