Results 21 to 30 of about 2,126 (211)
Proterozoic and early Palaeozoic microfossils in the Karikkoselkä impact crater, central Finland [PDF]
Bulletin of the Geological Society of Finland, 2001 The Karikkoselkä impact crater is located at Petäjävesi (Lat. 62°13.3' N, Long. 25°14.7' E), in central Finland. The crater is filled with impact-generated breccias and redeposited sedimentary rock yielding microfossils.
A. Uutela
doaj +1 more source
An overview of Chinese Silurian acritarch research [PDF]
Canadian Journal of Earth Sciences, 2016 The present paper reviews all investigations of Silurian acritarchs in China. Since Silurian acritarchs were first reported in China in 1978, significant progress has been made in Chinese Silurian acritarch research. A total of 30 scientific articles and theses have been published on Silurian acritarchs from China.
Yan, Kui, Li, Jun, Servais, Thomas
openaire +1 more source
Palynostratigraphy and palaeoecology of the Niur Formation, Tikdar section, northwest of Kerman, Central Iran [PDF]
Journal of Stratigraphy and Sedimentology Researches, 2019 Diverse, moderately to well-preserved palynomorphs including acritarchs (sensu stricto), prasinophytes cyst, chitinozoans, scolecodonts, and spores occur in some surface samples (90 meters thereof) of the Niur Formation (200 m thick) at the Tikdar ...
Hossein Hashemi +2 more
doaj +1 more source
Rivista Italiana di Paleontologia e Stratigrafia, 2020 The subject of this paper is new geological and stratigraphical data regarding the Paleozoic in the Sarrabus area (Southeastern Sardinia). More particularly Tremadocian (Lower Ordovician) acritarchs have been found in samples taken for microfossils ...
SEBASTIANO BARCA +2 more
doaj
Boletín Geológico, 1994 During a palynological investigation of Paleozoic series in the Colombian Cordillera Oriental Silurian-indicating fossils were found in Colombia. In this paper we describe four palynomorphs which were significant for the Silurian of the Quetame Massif.
Klaus F. Prossl, Joachim R. Grosser
doaj +1 more source
Red to Green: A Lipid Biomarker Record of Tonian‐Ediacaran Algae in Siberia
Geobiology, Volume 24, Issue 5, September/October 2026.ABSTRACT Multiple lines of evidence point to a major diversification of Eukarya in the late Tonian period, ca. 800–720 Ma ago. Regular steranes, lipid biomarkers primarily sourced from eukaryotes, are first unambiguously reported from multiple sites. Here, we present lipid biomarker stratigraphic records from two drill‐cores from the Lena‐Anabar Basin ...
Adriana I. Rizzo +7 more
wiley +1 more source
Proterozoic microfossils from the sedimentary rocks of the Lappajärvi impact crater [PDF]
Bulletin of the Geological Society of Finland, 1990 The Proterozoic microbiota of acritarchs is reported from the siltstone deposit of Lappajärvi. Diversity is low, with sphaeromorphs dominating the taxa, which also includes some coenobial and ovoidal specimens and a fragment of filament.
A. Uutela
doaj +1 more source
Palaeontology, Volume 69, Issue 5, September/October 2026.Abstract The fossil genus Charnia is emblematic of the evolutionary expansion of metazoans during the late Ediacaran. The first discovery of Charnia specimens from Scandinavia is here reported, alongside new examples of Palaeopascichnus, Aspidella‐type holdfasts, and possible scratch circles.
Yorick P. Veenma +8 more
wiley +1 more source
Morphologic Variability In Lower Palaeozoic Acritarchs: Importance For Acritarch Systematics
, 2008 Fatka, Oldřich, Brocke, Rainer (2008): Morphologic Variability In Lower Palaeozoic Acritarchs: Importance For Acritarch Systematics.
Fatka, Oldřich, Brocke, Rainer
openaire +1 more source
Papers in Palaeontology, Volume 12, Issue 4, July/August 2026.Abstract Cambrian Series 2 represents a key interval for documenting the evolution and diversification of early biomineralized skeletal animals. In this interval, small shelly fossils (SSF) provide an essential archive for regional biostratigraphy and intercontinental correlation.
Yeongju Oh +2 more
wiley +1 more source