Results 51 to 60 of about 2,126 (211)
Paleoenvironment of the Dalichai Formation, northeastern Semnan [PDF]
Journal of Stratigraphy and Sedimentology Researches, 2015 Palaeonvironment of the Dalichai Formation, northeastern Semnan, is envisaged based on 69 samples studied palynologically. Diverse and well-preserved palynofloras, viz., miospores, dinoflagellate cysts, foraminiferal test linings, acritarchs, wood debris
Fereshteh Sajjadi +4 more
doaj +2 more sources
Carnets de Géologie, 2005 The study of acritarchs in Russia was initiated by Naumova and Timofeev in the early 50s. Their initial results showed the high potential of these microfossils for biostratigraphy and was followed by a remarkable degree of research activity in the 70s ...
Raevskaya Elena
doaj
Geological Journal, Volume 60, Issue 1, Page 196-222, January 2025.The study examines Cretaceous to Palaeogene sedimentary sequences in the Anambra Basin, part of West African rift basins, utilising geochemical and palynological interpretations to understand organic matter accumulation. Palynofacies and geochemical data indicate a predominantly warm and humid tropical climate during a time of widespread marine ...
Erepamo J. Omietimi +5 more
wiley +1 more source
A peritidal Burgess‐Shale‐type fauna from the middle Cambrian of western Canada
Palaeontology, Volume 68, Issue 1, January/February 2025.Abstract Burgess‐Shale‐type (BST) faunas have proven critical for mapping the Cambrian assembly of animal‐dominated ecosystems, but have so far only been reported from fully subaqueous deposits. Here we integrate evidence from ichnofossils, sedimentary features, and small carbonaceous fossils (SCFs) from the middle Cambrian (Late Guzhangian, Series 3 ...
Giovanni Mussini +2 more
wiley +1 more source
Paleontological evidence for Late Cambrian in the Arburese area, SW Sardinia
Carnets de Géologie, 2005 New palynological investigations allowed a better definition of the age of terrigenous deposits of the Monte Fonnesu tectonic Unit, exposed in the Arburese area (SW Sardinia).
Musumeci Giovanni +3 more
doaj
Fountain Journal of Natural and Applied Sciences (FUJNAS), 2020 Palynological and palynofacies analyses were used to investigate the paleoenvironments and hydrocarbon potential of the Campanian-Maastrichtian Enugu Shale, Anambra Basin, Nigeria.
M. A. Olayiwola +2 more
doaj +1 more source
Hydrocarbon‐derived thrombolites from the Outer Carpathians (Lower Cretaceous, Poland)
Sedimentology, Volume 71, Issue 7, Page 2183-2209, December 2024.Abstract Shallow marine thrombolites from a newly discovered Lower Cretaceous cold seep in the Outer Carpathians (Poland) were analysed in order to untangle the complex sedimentological and biogeochemical processes involved in their formation and their diagenetic modifications.
Stefano Giunti +6 more
wiley +1 more source
Geobiology, Volume 22, Issue 6, November/December 2024.ABSTRACT Silicified peritidal carbonates of the Tonian Draken Formation, Spitsbergen, contain highly diverse and well‐preserved microfossil assemblages dominated by filamentous microbial mats, but also including diverse benthic and/or allochthonous (possibly planktonic) microorganisms. Here, we characterize eight morphospecies in focused ion beam (FIB)
Alexandre Fadel +5 more
wiley +1 more source
, 1993 1. Acritarchs are a polyphyletic group of unicellular organisms, essentially marine and fossil, with a very resistant organic membrane; the majority probably represent the cysts of microscopic, extinct eukaryote algae. This review gives a general account
FRANCINE MARTIN, Martin, F.
core +1 more source
Acritarchs of the Ediacaran Frecheirinha Formation, Ubajara Group, Northeastern Brazil
Anais da Academia Brasileira de Ciências, 2015 We report for the first time the occurrence of organic-walled microfossils in Ediacaran limestones and marls of the Frecheirinha Formation, Ubajara Group, and the first Precambrian acritarchs so far reported for northeastern Brazil. The assemblage of the
Leticia Chiglino +3 more
doaj +1 more source