Results 131 to 140 of about 100,556 (325)

Rapid terrestrial weathering of the CI1 carbonaceous chondrite find Oued Chebeika 002

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract Alteration of historic CI1 meteorite falls during their curation demonstrates the susceptibility of smectite‐rich carbonaceous chondrites to terrestrial exposure. The discovery of Oued Chebeika 002 in Morocco in June 2024 presents a unique opportunity to document the earliest stages of weathering of a CI1 find.
Martin R. Lee, Jasper Glazer
wiley   +1 more source

Repeatability, Genetic Variability and Importance of Forage Traits in Ecotypes of Brunswickgrass (Paspalum nicorae Parodi) via BLUP

open access: yesPlant Breeding, EarlyView.
ABSTRACT This study estimated the repeatability of forage traits in 84 Paspalum nicorae ecotypes using six statistical methods and quantified the minimum number of harvests needed for effective selection. Multivariate analyses based on best linear unbiased prediction (BLUP) values were also performed to assess genetic variability, identify key traits ...
Diógenes Cecchin Silveira   +9 more
wiley   +1 more source

Comparison of the Julian and Tuvalian beds in two cross-sections in the Central Sava Folds area (Slovenia)

open access: yesGeologija, 2002
A lithostratigraphic subdivision of the Julian and Tuvalian beds in the Toško Čelo andVintarjevski potok area has been performed in this paper. The sedimentary sequence in the Toško Čelo area is subdivided into seven lithostratigraphic units, namely ...
Matevž Novak, Stevo Dozet
doaj  

Coal gasification: New challenge for the Beaumont rotary feeder [PDF]

open access: yes, 1977
The use of rotary feeders in the coal gasification process is described with emphasis on the efficient conversion of coal to clean gaseous fuels.
Stelian, J.
core   +1 more source

Ichnological insights into deoxygenation across the Cenomanian–Turonian Boundary Oceanic Anoxic Event 2 in the northern extent of Western Interior Seaway (west‐central Alberta)

open access: yesSedimentology, EarlyView.
ABSTRACT In‐depth ichnological and sedimentological analyses of the Cenomanian–Turonian boundary Oceanic Anoxic Event (OAE2) from the Western Interior Seaway of west‐central Alberta reveal a persistent physico‐chemically stressed setting. The interval is characterised by a dominantly diminutive and diminished ichnological assemblage, with familiar ...
Sara K. Biddle, Murray K. Gingras
wiley   +1 more source

Long‐Term Storage of Meteoric Water in the Variscan Basement: Stable Isotope Constraints (δD–δ18O)

open access: yesTerra Nova, EarlyView.
ABSTRACT F‐Ba‐Pb‐Zn (±Ag) deposits near the unconformity between the Armorican and Aquitaine basins formed by mixing surface waters and brines with fluid ascending from the basement. To better constrain the source of this fluid and the conditions of mixing, we analyzed the hydrogen (δDwater) and oxygen (δ18Owater) isotopic composition of water trapped ...
Loïc Bouat   +2 more
wiley   +1 more source

Modification of dolomitization on reservoir spaces in reef–shoal complex: A case study of Permian Changxing Formation, Sichuan Basin, SW China

open access: yesOpen Geosciences
The porosity of the reef–shoal complex increases with the increase of dolomite content, and it is worth investigating whether dolomitization leads to the formation of new pores or maintains the original porosity.
Zhang Qiang   +5 more
doaj   +1 more source

Influence of structural setting, depositional environment and differential diagenesis on reservoir quality of the Xixiangchi formation in the central and southern Sichuan Basin, China

open access: yesFrontiers in Earth Science
The Middle-Upper Cambrian Xixiangchi Formation (504 - 488 Ma) dolomite in the central-southern Sichuan Basin constitutes significant hydrocarbon reservoirs, though their complex genetic mechanisms remain inadequately constrained.
Shizhen Chen   +18 more
doaj   +1 more source

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