Results 21 to 30 of about 8,490 (221)
Geosciences, 2018 Terraced iron formations (TIFs) are laminated structures that cover square meter-size areas on the surface of weathered bench faces and tailings piles at the Mount Morgan mine, which is a non-operational open pit mine located in Queensland, Australia ...
Jeremiah Shuster +4 more
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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
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Advantages of doubly polished thin sections for the study of microfossils in volcanic rock
Geochemical Transactions, 2006 Doubly polished thin sections, originally prepared for fluid inclusion studies, present great advantages in the study of microfossils in volcanic rocks.
Ivarsson M
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Microfossil-like tourmaline microlites in early Proterozoic nodular chert at Kiihtelysvaara, eastern Finland [PDF]
Bulletin of the Geological Society of Finland, 1992 Many Proterozoic silicified sedimentary carbonates have been reported to contain remains of early micro-organisms. One of these localities in the Fennoscandian Shield is the village of Hyypiä at Kiihtelysvaara in eastern Finland, where a nodular chert ...
J. Karhu, H. O'Brien
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Alpine Glacier Reveals Ecosystem Impacts of Europe's Prosperity and Peril Over the Last Millennium
Geophysical Research Letters, 2021 Information about past ecosystem dynamics and human activities is stored in the ice of Colle Gnifetti glacier in the Swiss Alps. Adverse climatic intervals incurred crop failures and famines and triggered reestablishment of forest vegetation but also ...
S. O. Brugger +10 more
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Red to Green: A Lipid Biomarker Record of Tonian-Ediacaran Algae in Siberia. [PDF]
GeobiologyABSTRACT 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 ...
Rizzo AI +7 more
europepmc +2 more sources
Frontiers in Earth Science, 2015 Microbialites are organo-sedimentary rocks found in abundance throughout the geological record back to ~3.5 Ga. Interpretations of the biological and environmental conditions under which they formed rely on comparisons with modern microbialites ...
Nina eZeyen +9 more
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Late Glacial vegetation, sedimentation and ice recession chronology in the surroundings of Lake Prossa, central Estonia [PDF]
Estonian Journal of Earth Sciences, 2011 Pollen records from Lake Prossa, located in the Saadjärv Drumlin Field, indicate rather homogeneous pollen spectra in the pre-Allerød period and a thick sediment sequence suggesting high input of mineral matter and erosion.
Kersti Kihno, Leili Saarse, Leeli Amon
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New Brittle Stars (Echinodermata, Ophiuroidea) from the Oligocene of the Mainz Basin, Germany
Taxonomy, 2022 The fossil record of the Ophiuroidea is still patchy, especially in the Cenozoic. Only four species have been described from the entire Oligocene, which is in stark contrast to the present-day diversity counting more than 2000 species.
Ben Thuy +2 more
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Holocene lacustrine microfossils and environmental changes [PDF]
, 1986 This review is concerned with the biostratigraphical use of the lacustrine microfossils such as diatoms, blue-green and green algae, Mallomonadaceae, Cladocera and larval insect remains preserved in lake sediments and their value as bioindicators of ...
P. Alhonen
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