Results 51 to 60 of about 7,518 (219)

Paleoenvironment and chemostratigraphy heterogenity of the Cretaceous organic-rich shales [PDF]

open access: yes, 2021
The Cretaceous Qingshankou Formation in the Songliao Basin is rich in shale oil resources, which has become one of the most important exploration targets of lacustrine shale oil in China.
Hou, Lianhua   +5 more
core   +1 more source

NEW DATA ON THE LOWER PLEISTOCENE (GELASIAN) LIGNITE BEDS OF CASTEL SAN PIETRO (RIETI, CENTRAL ITALY)

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2017
A multiproxy study of the lignite-bearing lacustrine sequence cropping out at Castel San Pietro (CSP) (Rieti, central Italy) provides new insights on the paleoenvironmental evolution of an extensional basin, located on the Tyrrhenian side of the Apennine
LUCA PANDOLFI   +4 more
doaj   +1 more source

Natural and anthropic pollution episodes during the Late Holocene evolution of the Tinto River estuary (SW Spain)

open access: yesScientia Marina, 2021
This paper investigates the paleoenvironmental evolution of a core extracted in the middle sector of the Tinto River estuary, SW Spain, one of the most polluted areas in the world due to mining over thousands of years (>4 kyr BP) and recent industrial ...
Marta Arroyo   +13 more
doaj   +1 more source

Correction: First Clarkforkian Equivalent Land Mammal Age in the Latest Paleocene Basal Sparnacian Facies of Europe: Fauna, Flora, Paleoenvironment and (Bio)stratigraphy

open access: yes, 2014
Correction: First Clarkforkian Equivalent Land Mammal Age in the Latest Paleocene Basal Sparnacian Facies of Europe: Fauna, Flora, Paleoenvironment and (Bio ...
PLOS ONE (2189197)
core   +1 more source

Ichnofabric variability and paleoenvironmental insights from the Middle Bhuban rocks of Aizawl, Mizoram, India

open access: yesNatural History Sciences
The Middle Bhuban succession of the Surma Group is extensively exposed in the Aizawl district of Mizoram, India; the study area predominantly features alternating intervals of shale, sandstone, and siltstone.
Chinmoy Rajkonwar   +1 more
doaj   +1 more source

Different Orbital Controls on Detrital Magnetic Components in the Ninety‐East Ridge Since the Late Pleistocene

open access: yesGeophysical Research Letters, Volume 53, Issue 19, 16 October 2026.
Abstract Magnetic minerals preserved in marginal‐sea sediments can serve as distinct fingerprints for unraveling paleoenvironmental evolution. However, the forcing mechanisms that govern the transport and accumulation of individual magnetic minerals at orbital timescales remain poorly constrained.
Yulong Guan   +6 more
wiley   +1 more source

Paleoenvironments of Late Devonian tetrapods in China

open access: yesScientific Reports, 2023
AbstractThe major evolutionary transition from fish to amphibian included Late Devonian tetrapods that were neither fish nor amphibian. They had thick necks and small limbs with many digits on elongate flexuous bodies more suitable for water than land.
Xuelian Guo   +2 more
openaire   +3 more sources

Effect of Laboratory Reagents for Cleaning Modern Contamination on the δ15N Integrity of Nitrogen‐Poor Samples

open access: yesRapid Communications in Mass Spectrometry, Volume 40, Issue 19, 15 October 2026.
ABSTRACT Rationale Nitrogen isotope values have been widely used for tracing ancient biogeochemical processes, but contaminant‐sensitive materials, such as Precambrian sedimentary rocks, meteorites, or returned extraterrestrial samples, often have low nitrogen levels and are thus vulnerable to modern organic contamination.
Kunmanee Bubphamanee   +2 more
wiley   +1 more source

Functional anatomy, jaw mechanisms, and feeding behavior of Dunkleosteus terrelli (Placodermi, Arthrodira)

open access: yesThe Anatomical Record, Volume 309, Issue 10, Page 2574-2635, October 2026.
A new musculoskeletal reconstruction and revision of the cranio‐mandibular anatomy of the Devonian arthrodire placoderm Dunkleosteus terrelli from a comparative and functional anatomical perspective. Dunkleosteus is a specialized arthrodire with many specializations for feeding on large vertebrates, and many of its features are part of broader ...
Russell K. Engelman   +4 more
wiley   +1 more source

Characteristics and Paleoenvironment of High-Quality Shale in the Triassic Yanchang Formation, Southern Margin of the Ordos Basin

open access: yes, 2023
A set of high-quality lacustrine shales at the bottom of the Chang 7 member of the Yanchang Formation in the Ordos Basin is one of the main source rocks of tight oil and gas and shale oil in the Yanchang Formation.
Congjun Feng, Mengsi Sun, Yipu Li
core   +1 more source

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