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Borings in phosphatized Cambrian siltstone pebbles, Estonia (Baltica)

Published online by Cambridge University Press:  20 November 2015

OLEV VINN  and
URSULA TOOM
OLEV VINN*
Affiliation:
Department of Geology, University of Tartu, Ravila 14A, 50411 Tartu, Estonia
URSULA TOOM
Affiliation:
Institute of Geology, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia
*
†Author for correspondence: [email protected]
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Abstract

The earliest known macroborings (Trypanites) from Baltica occur in early Cambrian phosphatized siltstone pebbles from Kopli quarry in Tallinn, Estonia. Trypanites borings also occur in Furongian phosphatized siltstone pebbles in northern Estonia. The intensity of bioerosion on these Cambrian pebbles is low compared to analogue substrates from Ordovician deposits of Baltica. These bored phosphatized siltstone pebbles show that bioerosion of hard substrates occurred in relatively cold climate epicontinental seas during Cambrian time.

Keywords

BioerosionTrypanitestrace fossilmobile hardgroundslower Cambrian
Type
Original Articles
Information
Geological Magazine , Volume 153 , Issue 4 , July 2016 , pp. 635 - 642
Copyright
Copyright © Cambridge University Press 2015 

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