Results 171 to 180 of about 31,001 (301)

A review of the supercritical state of eruption‐fed volcanic density currents in subaerial and subaqueous settings

open access: yesSedimentology, EarlyView.
ABSTRACT Subaerial Pyroclastic Density Currents (PDCs) and Subaqueous Eruption‐Fed Density Currents (SEFDCs) produced during volcanic eruptions can present major hazards to surrounding communities and ecosystems. The bedforms deposited by these volcanic density currents can provide insights into the nature of transport and depositional processes, which
Shannon E. Frey   +2 more
wiley   +1 more source

Mummified Wood of Juniperus (Cupressaceae) from the Late Miocene of Taman Peninsula, South Russia. [PDF]

open access: yesPlants (Basel), 2022
Stepanova AV   +4 more
europepmc   +1 more source

The Petaca (late Oligocene-middle Miocene) and Yecua (late Miocene) formations of the Subandean-Chaco basin, Bolivia, and their tectonic significance

open access: yes, 1993
The Petaca (late Oligocene-middle Miocene) and Yecua (late Miocene) formations of the Subandean-Chaco basin, Bolivia, and their tectonic significance. The Petaca and Yecua formations are the first two units of the Cenozoic foreland fill in the central and southern Subandean belt of Bolivia.
Marshall, L.G.   +2 more
openaire   +2 more sources

Mid‐infrared spectroscopy applied to a multi‐level cave system (Montmaurin, SW France): An innovative method for assessing sediment provenance

open access: yesSedimentology, EarlyView.
ABSTRACT Deciphering sediment provenance is essential to understand depositional patterns and dynamics. This question is particularly important in archaeological contexts to constrain the sedimentological history of unearthed material—an information critically needed, for example, to estimate the age of the deposits—or to apprehend sediment movement ...
Fuchs Coraline   +8 more
wiley   +1 more source

Porosity Preservation in Deeply Buried (8500 m) Jurassic Calcareous Mudstones of the Vienna Basin (Austria)

open access: yesTerra Nova, EarlyView.
ABSTRACT Significant porosity of more than 5% was found at depths of more than 8500 m in poorly sorted, calcareous mudstones of the Malmian Mikulov Formation. These overpressured rocks are the main hydrocarbon source rock in the Vienna Basin. Core samples from present‐day depths of 8150 m to 8550 m were analysed using X‐ray diffraction and scanning ...
Susanne Gier   +3 more
wiley   +1 more source

Systematics of Marmosa Subgenus Micoureus With Emphasis in ‘rapposa’ Group (Didelphidae, Marmosini): Geographic Variation and Revalidation of M. budini

open access: yesZoologica Scripta, EarlyView.
ABSTRACT Micoureus is the most species‐rich subgenus within the genus Marmosa. Conflicting arrangements regarding the number of species comprising this subgenus have been proposed and the validity of M. budini has been debated. Here, we used an approach integrating genetic and morphological data were conducted to reanalyze the ‘rapposa’ group ...
Maria Clara Santos Ribeiro   +3 more
wiley   +1 more source

Last Tile Added to a Mosaic: Phylogenetic Placement of Enigmatic Freshwater Fish Leucalburnus satunini (Cypriniformes: Leuciscidae) Uncovered

open access: yesZoologica Scripta, EarlyView.
ABSTRACT Subfamily Leuciscinae, the largest freshwater fish group of the western Palearctic region, has been widely studied, including the phylogenetic relationships between its species and genera. However, until now, one genus completely escaped attention in this regard. Even though several works hypothesised about its evolutionary relationships based
Jasna Vukić   +3 more
wiley   +1 more source

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