Marcasite at the Permian‐Triassic Transition
Geophysical Monograph Series, Page 377-399., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Elena Lounejeva +7 more
wiley +2 more sources
Microfossils in the Ordovician erratic boulders from Southwestern Finland [PDF]
Bulletin of the Geological Society of Finland, 1995 Chitinozoans, ostracods and acritarchs found in four glacially transported limestone boulders from the south-western coast of Finland have been studied in order to test the usefulness of these microfossil groups in age determinations. Also rare specimens
J. Nõlvak, T. Meidla, A. Uutela
doaj +1 more source
Tubular microfossils from ∼2.8 to 2.7Ga-old lacustrine deposits of South Africa: A sign for early origin of eukaryotes? [PDF]
, 2016 Unequivocal evidence for Archean eukaryotic life has been long sought for and is a matter of lively debate. In the absence of unambiguous fossils this debate has focused on biogeochemical signatures and molecular phylogenies.
Altermann, Wladyslaw +3 more
core +2 more sources
3.46 Ga Apex chert 'microfossils' reinterpreted as mineral artefacts produced during phyllosilicate exfoliation [PDF]
, 2016 We acknowledge the facilities, scientific and technical assistance of the Australian Microscopy & Microanalysis Research Facility at: Centre for Microscopy Characterisation and Analysis, The University of Western Australia; Electron Microscopy Unit, The ...
Brasier, Alexander +4 more
core +1 more source
Comptes Rendus Palevol, 2009 Defining biosignatures, i.e. features that are indicative of past or present life, has been one of the major strategies developed over the last few years for the search of life on the early Earth and in the solar system. Current knowledge about microscopic remnants of fossil organisms, namely microfossils are reviewed, focusing on: (i) studies of ...
Javaux, Emmanuelle, Benzerara, karim
openaire +3 more sources
On the deglaciation chronology of the Palivere ice-marginal zone, northern Estonia [PDF]
Bulletin of the Geological Society of Finland, 2012 This paper presents new bio-, litho- and chronostratigraphical evidence from two adjacent sediment sequences of the Tõdva and Saku basins, northern Estonia that refine the age estimate of the Palivere ice-marginal zone and the deglaciation history of ...
L. Saarse +4 more
doaj +1 more source
Recognition of Rare Microfossils Using Transfer Learning and Deep Residual Networks
Biology, 2022 Various microfossils from the early Cambrian provide crucial clues for understanding the Cambrian explosion and the origin of animal phyla. However, specimens with important anatomical structures are extremely rare and the efficiency of retrieving such ...
Bin Wang +8 more
doaj +1 more source
Development of freeze-thaw processing technique for disaggregation of indurated mudrocks and enhanced recovery of calcareous microfossils [PDF]
, 2014 Microfossil extraction from indurated mudrocks is widely acknowledged as challenging, especially for foraminifera. Here we report development of the freeze–thaw extraction method through the addition of rapid heating, detergent and ultrasound stages.
Coe, Angela L., Kennedy, Alice E.
core +1 more source
Palynomorphs of brackish and marine species in cores from the freshwater Lake Sapanca, NW Turkey [PDF]
, 2010 Lake Sapanca, which is located on the Sakarya–Sapanca–İzmit corridor in NW Turkey, is a freshwater lake with numerous fish farms in its catchment. Palynological analyses including non-pollen palynomorphs of a short (38.5 cm) and a longer sediment core ...
Aksu +49 more
core +1 more source
Extent of the northern Baltic Sea during the Early Palaeozoic Era - new evidence from Ostrobothnia, western Finland [PDF]
Bulletin of the Geological Society of Finland, 1998 This study reports new evidence of the extent of the northern Baltic Sea during the Cambrian and Ordovician periods. A drillcore (DC304) from the Lappajärvi impact crater, western Finland, and erratics from the surrounding area were studied for ...
A. Uutela
doaj +1 more source