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A multiproxy study of the Puhmu core section (Estonia, Upper Ordovician): consequences for stratigraphy and environmental interpretation

Puursüdamiku litoloogiline, litostratigraafiline, brahhiopoodide, ostrakoodide ja kitiinikute uurimine koos süsiniku kemostratigraafiaga vöimaldas oluliselt täiendada teadmisi Pöhja-Eesti geoloogilise arenguloo kohta. Selgitati läbilöike alumise osa vetiklubjakivi töenäoline kuulumine Rakvere lademe...

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Published in:Estonian journal of earth sciences 2017-06, Vol.66 (2), p.77-92
Main Authors: Kaljo, Dimitri, Hints, Linda, Martma, Tonu, Nolvak, Jaak
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creator Kaljo, Dimitri
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Martma, Tonu
Nolvak, Jaak
description Puursüdamiku litoloogiline, litostratigraafiline, brahhiopoodide, ostrakoodide ja kitiinikute uurimine koos süsiniku kemostratigraafiaga vöimaldas oluliselt täiendada teadmisi Pöhja-Eesti geoloogilise arenguloo kohta. Selgitati läbilöike alumise osa vetiklubjakivi töenäoline kuulumine Rakvere lademesse ja selle all olevate kihtide omapärane brahhiopoodide ning kitiinikute koosseis, mis viitavad Oandu vanusele. Süsiniku ja hapniku isotoopide koosseisu dünaamika selgitamisel kasutati esmakordselt kompleksselt proove kivimist, käsijalgsete kodadest ning tetrakorallide skeletist. Paleokarsti esinemine Saunja kihistu ülemisel pinnal ja Paekna ning Adila kihistu sagedaste katkestuspindade paiknemine süsiniku isotoopide madalseisu tasemetel viitavad paleokeskkonna keerukustele, mida seni ei ole piisavalt selgitatud.
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subjects Algae
Analysis
Baltica
Biostratigraphy
brachiopods
Calcite
Carbon
carbon and oxygen isotopes
Carbon isotopes
chitinozoans
Colour
Coral reefs
Diagenesis
Estonia
Frameworks
Geological time
Geology
Hirnantian
Isotopes
Katian
Lithology
Marine invertebrates
Mass
Mineral resources
Ordovician
Relative dating (Chronology)
Rock
Rocks
Stratigraphy
Studies
Variability
title A multiproxy study of the Puhmu core section (Estonia, Upper Ordovician): consequences for stratigraphy and environmental interpretation
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