Results 11 to 20 of about 1,147 (200)
The Ordovician acritarch genus Coryphidium [PDF]
Revue de Micropaléontologie, 2008 The acritarch genus Coryphidium Vavrdova, 1972 is one of the most frequently recorded acritarch taxa in the Ordovician. The original diagnoses, stratigraphical ranges and geographical distribution of all Coryphidium species are critically evaluated in a review of published literature supplemented by studies of material from the British Isles, Belgium ...
Servais T +3 more
openaire +5 more sources
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 +3 more sources
Discovery of the messaoudensis–trifidum acritarch assemblage (upper Tremadocian–lower Floian, Lower Ordovician) in the subsurface of Morocco [PDF]
Estonian Journal of Earth Sciences, 2015 The upper Tremadocian to lower Floian messaoudensis–trifidum acritarch assemblage was first described from the Skiddaw Group of England and subsequently from several localities on the Gondwanan margin that were positioned in high southern latitudes ...
Hendrik Nowak +3 more
doaj +3 more sources
The palynology and stratigraphy of the Cambrian Nolichucky Shale and associated formations at Thorn Hill, Tennessee, USA [PDF]
, 2012 A detailed palynological and stratigraphic study was undertaken on the Cambrian Nolichucky Shale, Maynardville Limestone and Copper Ridge Dolomite (Conasauga Group), as exposed at Thorn Hill, northeastern Tennessee, USA.
Pedder, Brian E
core +6 more sources
Early Cambrian acritarch assemblage zones in South Australia and global correlation
, 2007 Lower Cambrian sediments in the Arrowie and Stansbury Basins were deposited on a rifting continental platform and contain abundant acritarchs, trace fossils, small shelly fossils, archaeocyaths, trilobites and brachiopods.
Moczydlowska, Malgorzata, +2 more
core +9 more sources
Middle–Late Ordovician organic- walled phytoplankton from Sweden: diversity and early radiation [PDF]
Estonian Journal of Earth Sciences, 2023 The Borenshult-1 core, drilled in the vicinity of Motala, east of Lake Vättern in south central Sweden, comprises a well-dated and nearly complete succession of marine marly carbonates deposited relatively close to land. The 34 core samples analyzed for
Claudia V. Rubinstein, Vivi Vajda
doaj +1 more source
Acritarch clusters from the Cambrian (Miaolingian) of the Příbram-Jince Basin, Czech Republic
, 2022 Monogeneric clusters of five acritarch genera (Adara, Cymatiosphaera, Eliasum, Synsphaeridium and Timofeevia) were discovered in palynological residues obtained from fine-grained siliciclastic samples from the middle Cambrian (Miaolingian) Jince ...
Jakub Vodička (13288958) +2 more
core +1 more source
Petroleum Research, 2019 Based on numerous microfossils in Mesozoic of North Carnarvon Basin in Australia, the Mesozoic paleoclimate and paleoenvironment were analyzed, the paleogeographic background and development model of Mesozoic high-quality source rocks were investigated ...
Xing Niu +6 more
doaj +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
Age of the Ordovician sedimentary succession in Lumparn Bay, Åland Islands, Finland [PDF]
Estonian Journal of Earth Sciences, 2023 Depression of the ancient Lumparn meteorite impact structure in the à land Islands is partly infilled with the lower Palaeozoic sediments, lying presently below sea level. The Cambrian and Ordovician sedimentary cover is distributed in the area of 15 km2,
Leho Ainsaar, Tõnu Meidla
doaj +1 more source