Results 41 to 50 of about 2,126 (211)

PRIMER REGISTRO PALINOLÓGICO DE LA FORMACIÓN PUNTA NEGRA (DEVÓNICO MEDIO-SUPERIOR), DE LA PRECORDILLERA DE SAN JUAN, ARGENTINA

Publicación Electrónica de la Asociación Paleontológica Argentina, 2010
This paper presents the first palynological record of the Punta Negra Formation, Devonian from the San Juan Precordillera, Argentina. Twelve acritarchs species, 11 spores species, 5 prasinophyte species, 2 chitinozoans genera and one incertae sedis were ...
Claudia V. Rubinstein
doaj  

Late Devonian (Frasnian–Famennian) palynomorphs from the Padeha and Bahram Formations of Shahzadeh Mohammad section, northwest of Kerman, Iran

Acta Palaeobotanica, 2022
A diverse and well-preserved microphytoplankton assemblage is reported from a measured section of Frasnian–Famennian (Upper Devonian) Padeha and Bahram Formations in Shahzadeh Mohammad area, northwestern Kerman, southeast Iran. The palynoflora assemblage
Roghayeh Rouzegar, Péter Ozsvárt
doaj   +1 more source

Linking palaeo‐wildfire to depositional environmental and ecological dynamics of an Early–Middle Pennsylvanian fluvial‐tidal transition zone—Palynology and pyrolysis evidence

The Depositional Record, Volume 12, Issue 1, February 2026.
The Pennsylvanian landscape in the Forest City basin was characterised by low‐lying lycopod tree and fern swamp forests with persistently high groundwater tables and adjacent fluvial channel, floodplain and upland environments. The occurrence of abundant charcoal within a specific thin interval in the Cherokee Group indicates substantial wildfire ...
Dustin Northrup, Emily Finzel, Pierre Zippi, Kevin Bohacs   +3 more
wiley   +1 more source

Ediacaran complex acanthomorphic acritarch assemblage from the Owk Shale of the Kurnool Group: Morphological insights through Confocal Laser Scanning Microscope

Journal of the Palaeontological Society of India
The Organic-Walled Microfossils (OWM), especially acritarchs, are essential in understanding eukaryotes’ early evolution and diversification in the Proterozoic Era.
YOGESH KUMAR, MUKUND SHARMA, SHREERUP GOSWAMI, VEERU KANT SINGH   +3 more
doaj   +1 more source

Fluid Inclusion Stratigraphy and Multistage Hydrocarbon Evolution in the Risha Gas Field, Jordan

Geofluids, Volume 2026, Issue 1, 2026.
An integrated fluid inclusion stratigraphy (FIS) and petrographic analysis of the RH‐3 well in the Risha Gas Field, Jordan, reveals a highly compartmentalized vertical fluid column. The upper section (1200–1750 m) is dominated by wet‐gas to gas‐condensate fluids, transitioning to dry gas below 1850 m.
Mohamed Arafat, Fayez Ahmad, Abdelrahman Qteishat, Shu Jiang, Sherif Farouk, Khaled Al-Kahtany, Ibrahim Atwah   +6 more
wiley   +1 more source

Variability in the Ordovician acritarch Dicrodiacrodium

, 1996
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Servais, Thomas, Brocke, Rainer, Fatka, Olda   +2 more
openaire   +1 more source

Elemental Mapping Reveals Selective Dolomitization in Tonian Stromatolites: Implications for Early Diagenesis and Paleoenvironmental Proxies

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 12, December 2025.
Abstract Stromatolites archive critical information on Precambrian marine environments, but their geochemical signals are often obscured using complex diagenetic processes. Tonian stromatolites from the Weiji Formation, North China, show selective dolomitization in dark stromatolitic laminae, forming zoned dolomites.
Ziheng Liang, Meng Ning, Chenqing Li, Xia Wang, Chaochao Xing   +4 more
wiley   +1 more source

Phytoplankton Blooms on the Barents Shelf, Svalbard, Associated With the Permian–Triassic Mass Extinction

AGU Advances, Volume 6, Issue 5, October 2025.
Abstract Mid‐ to higher‐latitude shallow marine environments are suggested to serve as refugia for organisms during intervals of rapid environmental change associated with hyperthermals. To understand the role of these environments during hyperthermals, we herein investigate the Permian–Triassic environmental crisis, which led to the most severe mass ...
S. Z. Buchwald, D. Birgel, K. Senger, T. Mosociova, Y. Pei, V. Zuchuat, L. G. Tarhan, A. B. Frank, F. Galasso, M. A. Gómez Correa, E. Koşun, B. Karapunar, X. Wang, E. Kustatscher, H. Prinoth, N. Lahajnar, R. Steinkrauss, J. Peckmann, W. J. Foster   +18 more
wiley   +1 more source

Origins and Alteration of Ediacaran Carbonates Recording the Shuram Excursion in Oman

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 5, May 2025.
Abstract The Shuram excursion is the largest known negative carbon isotope excursion in Earth's history. Recognized globally, it follows the Ediacaran Gaskiers glaciation and precedes a marked increase in the diversity and complexity of the earliest macroscopic multicellular organisms in the fossil record.
Kristin D. Bergmann, Magdalena R. Osburn, Noah T. Anderson, Claire Hayhow, Julia Wilcots, Marjorie D. Cantine, Woodward W. Fischer, Magali Bonifacie   +7 more
wiley   +1 more source

The Miocene lacustrine carbonate factory of the Ñirihuau Formation, Ñirihuau Basin, North Patagonian Andes, Argentina

The Depositional Record, Volume 11, Issue 1, Page 147-181, February 2025.
Detailed sedimentologic, petrographic and geochemical analyses of the lacustrine deposits registered on the Ñirihuau Formation middle section in the northern sector of the Ñirihuau Basin are presented. The lacustrine carbonates found within these deposits were analysed to characterise the palaeolake system as well as the carbonate factory of the basin,
Camila Santonja, Cecilia A. Benavente, Julieta Suriano, Arturo M. Heredia, Natalia Fortunatti, Ana L. Rainoldi, Diego A. Kietzmann, Florencia Bechis   +7 more
wiley   +1 more source