Results 61 to 70 of about 5,193 (249)

On the specification of the chronostratigraphic scheme of the Buzko-Rosynskyi block of the Ukrainian Shield

Мінеральні ресурси України, 2020
In the current correlation chronostratigraphic scheme of early Precambrian of the Ukrainian Shield, among Neoarchean supra crystalline formations of the Buzko-Rosynskyi block, it is identified the Rosynsko-Tikytska series, which consist of the Myzynivska
V. P. Bezvynnyi, M. M. Kostenko
doaj   +1 more source

Palaeomagnetism of Lower Ordovician and Upper Precambrian Rocks from Argentina

Journal of geomagnetism and geoelectricity, 1980
Palaeomagnetic data from samples collected in a rock sequence of tuffs and shales (Suri Formation), exposed in northwestern Argentina, indicate that the geomagnetic field had reversed polarity in Llanvirnian time. The samples from the top of the sequence also record, at least, an excursion of the geomagnetic field.The palaeomagnetic study carried out ...
openaire   +2 more sources

New magnetotelluric data through the boundary between the Ossa Morena and Centroiberian Zones [PDF]

, 2005
The south-western part of the Iberian Peninsula, including the southern branch of the Iberian Massif, has recently been the subject of several magnetotelluric (MT) studies.
Almeida, E., Paz, C., Heise, W., Pous, Jaume, Muñoz Soler, Gerard, Monteiro Santos, F., Pous, J., Pous i Fábregas, Jaume, Heise, Wiebke, Paz, Maria Catarina, Muñoz, G., Almeida, Eugénio, Monteiro Santos, F. A., Monteiro Santos, Fernando   +13 more
core   +1 more source

Dominance and toxicity without lethality: Exploring biomass, cyanometabolites, and Daphnia responses across Cyanobacterial strains

Journal of Phycology, EarlyView.
Abstract Cyanobacteria are cosmopolitan, important components of biomass with a remarkable ability to synthesize a diverse array of bioactive compounds, some of which may have toxic effects on other organisms and ecosystems. In this study, filamentous cyanobacterial strains isolated predominantly from temperate European freshwaters (Aphanizomenon ...
Łukasz Wejnerowski, Tamara Dulić, Sultana Akter, Michał Rybak, Agnieszka Piasecka, Jakub Szymkowiak, Oskar Kamiński, Anna Czerepska, Filip Pniewski, Zorica Svirčev, Ewa Poniecka, Krzysztof Zawierucha, Katarzyna Taylor, Marcin Krzysztof Dziuba, Jussi Meriluoto   +14 more
wiley   +1 more source

The Karst Mandhip Khol-python cave complex in the lenticular limestone intercalations of the matamorphic Chhatrela formation (Chhattisgarh, India)

Acta Carsologica, 2011
The Mandhhip Khhol-Pyton cave, located in an area declared Protected Forest in thhe Rajnandgaon District about 7 km in a direct line WwNWw from thhe village of Thakurtola (N21°39’:E080°58’), consists of an upper level orientated essentially along NE-SWw ...
Rosario Ruggieri, Jayant Biswas
doaj   +1 more source

Determining impact angle from the spatial distribution of shock metamorphism: A case study of the Gosses Bluff (Tnorala) impact structure, Australia

Meteoritics &Planetary Science, EarlyView.
Abstract The majority of planetary impacts occur at oblique angles. Impact structures on Earth are commonly eroded or buried, rendering the identification of the direction and angle of impact—using methods such as asymmetries in ejecta distribution, surface topographic expression, central uplift structure, and geophysical anomalies—challenging. In this
Eloise E. Matthews, Auriol S. P. Rae, Thomas Kenkmann, Nicholas E. Timms, Aaron J. Cavosie, Marian B. Holness   +5 more
wiley   +1 more source

Strontium isotopes are consistent with low‐elevation foraging limits for Henst's goshawk

Wildlife Society Bulletin, 2017
Apex predators play critical roles in the ecosystems they inhabit. Unfortunately, little is known about movement patterns for many species. This information is critical for evaluating vulnerability to habitat loss and the adequacy of existing or proposed
Brooke E. Crowley, Philip A. Slater, Summer J. Arrigo‐Nelson, Andrea L. Baden, Sarah M. Karpanty   +4 more
doaj   +1 more source

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

Features of development of new direction exploration work in the Eastern region Ukraine. Article 1. The objective difficulties mapping complex base

Мінеральні ресурси України, 2016
Base oil and gas complex, of which the new area exploration in the Eastern region of Ukraine consists of lower (subsurface section Precambrian basement) and upper (Precambrian weathering crust, roofing layers of sedimentary rock) sub.
V. P. Lebed
doaj  

Sedimentology of silica granules and haematite in the 3.47 Ga Antarctic Creek Member, Mount Ada Basalt, Western Australia

Sedimentology, EarlyView.
ABSTRACT The Paleoarchean Antarctic Creek Member of the Mount Ada Basalt, Eastern Pilbara Terrane, Western Australia, includes beds of jasper and white chert composed of sand‐sized silica granules that often contain or are mixed with silt‐sized particles of haematite.
Donald R. Lowe, Gary R. Byerly
wiley   +1 more source