Results 31 to 40 of about 83,571 (346)

The Sedimentary Cycle on Early Mars

open access: yesAnnual Review of Earth and Planetary Sciences, 2019
Two decades of intensive research have demonstrated that early Mars ([Formula: see text]2 Gyr) had an active sedimentary cycle, including well-preserved stratigraphic records, understandable within a source-to-sink framework with remarkable fidelity.
McLennan, S   +3 more
openaire   +3 more sources

Tidal flat deposits of the Lower Proterozoic Campbell Group along the southwestern margin of the Kaapvaal Craton, Northern Cape Province, South Africa [PDF]

open access: yes, 1991
Lower Proterozoic stromatolites and associated clastic carbonate deposits of the Campbell Group, from the southern margin (Prieska area) of the Kaapvaal Craton, northern Cape Province, are described.
Aigner   +66 more
core   +1 more source

Study on the Early Cretaceous fluvial-desert sedimentary paleogeography in the Northwest of Ordos Basin

open access: yesOpen Geosciences, 2023
Early Cretaceous desert sedimentary system was developed in Northwest Ordos Basin. At present, the research degree of desert sedimentary paleogeography is low.
Feng Yangwei   +5 more
doaj   +1 more source

Paleogeography of Accumulation of the Middle-Upper Permian Red Mudstones in the Kazan Volga Region [PDF]

open access: yesУчёные записки Казанского университета: Серия Естественные науки, 2016
In this work we focus on sedimentology, mineralogy, grain size, and geochemistry of red mudstones of the Urzhumian (Wordian) and Severodvinian (Capitinian) reference section of the Monastyrskii ravine to specify their depositional settings and ...
F.A. Mouraviev   +7 more
doaj  

INTERPRETATION OF MAJOR STRUCTURES WITHIN THE BASEMENT REGION OF BENUE-NIGER CONFLUENCE FROM AEROMAGNETIC AND RADIOMETRIC DATA KOGI STATE NIGERIA [PDF]

open access: yesGeological Behavior, 2021
Interpretation of Aeromagnetic and Radiometric Data covering the basement region of Benue-Niger confluence was executed to delineate major structures and other geologic frame works of mineral interest.
Fidelis I. Kwaghhua   +2 more
doaj   +1 more source

Sulfate Burial Constraints on the Phanerozoic Sulfur Cycle [PDF]

open access: yes, 2012
The sulfur cycle influences the respiration of sedimentary organic matter, the oxidation state of the atmosphere and oceans, and the composition of seawater.
Fischer, Woodward W.   +2 more
core   +1 more source

Ongoing transients in carbonate compensation [PDF]

open access: yes, 2010
Uptake of anthropogenic CO2 is acidifying the oceans. Over the next 2000 years, this will modify the dissolution and preservation of sedimentary carbonate.
Andreas F. Hofmann   +42 more
core   +2 more sources

Impact of volcanism on the sedimentary record of the Neuquén rift basin, Argentina: towards a cause and effect model [PDF]

open access: yes, 2018
The analysis of volcano-sedimentary infill in sedimentary basins constitutes a challenge for basin analysis and hydrocarbon exploration worldwide. In order to understand the contribution of volcanism to the sedimentary record in rift basins, we study the
Abebe   +150 more
core   +1 more source

Controls on Cyclic Formation of Quaternary Early Diagenetic Dolomite [PDF]

open access: yes, 2018
The origin of sedimentary dolomite and the factors that control its formation within the geological record remain speculative. In most models, dolomite formation is linked to evaporative conditions, high water temperature, increasing Mg/Ca ratio ...
Bontognali, T. R. R.   +3 more
core   +2 more sources

Marine and Transitional Middle/Upper Eocene Units of the Southeastern Pyrenean Foreland Basin (NE spain)

open access: yesGeologica Acta, 2003
The stratigraphic basis of this work has allowed the use of larger foraminifers in the biostratigraphic characterisation of the new Shallow Benthic Zones (SBZ).
J. Serra Kiel   +7 more
doaj   +1 more source

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