Age of the Kalana Lagerstätte, early Silurian, Estonia
The Kalana quarry in central Estonia is known for its exceptionally well-preserved non-calcified algal and other fossils. The interval with the fossil Konservat Lagerstätte in the Kalana section has previously been tentatively dated as early Aeronian. Recent findings of graptolites now enable more p...
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doaj-291a2bde1729439e826cfa6f272960cb2020-11-24T21:39:27ZengEstonian Academy PublishersEstonian Journal of Earth Sciences1736-47281736-75572016-05-0165210511410.3176/earth.2016.1010.3176/earth.2016.10Age of the Kalana Lagerstätte, early Silurian, EstoniaPeep Männik0Oive Tinn1David K. Loydell2Leho Ainsaar3Institute of Geology at Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia; peep.mannik@ttu.eeDepartment of Geology, University of Tartu, Ravila 14a, 50411 Tartu, Estonia; oive.tinn@ut.eeSchool of Earth and Environmental Sciences, University of Portsmouth, Burnaby Road, Portsmouth PO1 3QL, UK; david.loydell@port.ac.ukDepartment of Geology, University of Tartu, Ravila 14a, 50411 Tartu, Estonia; leho.ainsaar@ut.eeThe Kalana quarry in central Estonia is known for its exceptionally well-preserved non-calcified algal and other fossils. The interval with the fossil Konservat Lagerstätte in the Kalana section has previously been tentatively dated as early Aeronian. Recent findings of graptolites now enable more precise dating of these beds. The strata yielding the Lagerstätte are not older than the mid-Aeronian and correspond to the Pribylograptus leptotheca graptolite Biozone. In terms of conodont biostratigraphy they correlate with the middle of the Pranognathus tenuis conodont Biozone. It has also become evident that the uppermost Jõgeva Beds of the Nurmekund Formation, and probably also the uppermost Ikla Member of the Saarde Formation, are younger than previously thought and correlate with the Pribylograptus leptotheca graptolite Biozone. Our data additionally indicate that the conodont genus Aulacognathus had appeared by the mid-Aeronian.http://www.kirj.ee/public/Estonian_Journal_of_Earth_Sciences/2016/Issue_2/earth-2016-2-105-114.pdfKalana Lagerstätteconodontsgraptolitesbiostratigraphyearly SilurianEstonia. |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Peep Männik Oive Tinn David K. Loydell Leho Ainsaar |
spellingShingle |
Peep Männik Oive Tinn David K. Loydell Leho Ainsaar Age of the Kalana Lagerstätte, early Silurian, Estonia Estonian Journal of Earth Sciences Kalana Lagerstätte conodonts graptolites biostratigraphy early Silurian Estonia. |
author_facet |
Peep Männik Oive Tinn David K. Loydell Leho Ainsaar |
author_sort |
Peep Männik |
title |
Age of the Kalana Lagerstätte, early Silurian, Estonia |
title_short |
Age of the Kalana Lagerstätte, early Silurian, Estonia |
title_full |
Age of the Kalana Lagerstätte, early Silurian, Estonia |
title_fullStr |
Age of the Kalana Lagerstätte, early Silurian, Estonia |
title_full_unstemmed |
Age of the Kalana Lagerstätte, early Silurian, Estonia |
title_sort |
age of the kalana lagerstätte, early silurian, estonia |
publisher |
Estonian Academy Publishers |
series |
Estonian Journal of Earth Sciences |
issn |
1736-4728 1736-7557 |
publishDate |
2016-05-01 |
description |
The Kalana quarry in central Estonia is known for its exceptionally well-preserved non-calcified algal and other fossils. The interval with the fossil Konservat Lagerstätte in the Kalana section has previously been tentatively dated as early Aeronian. Recent findings of graptolites now enable more precise dating of these beds. The strata yielding the Lagerstätte are not older than the mid-Aeronian and correspond to the Pribylograptus leptotheca graptolite Biozone. In terms of conodont biostratigraphy they correlate with the middle of the Pranognathus tenuis conodont Biozone. It has also become evident that the uppermost Jõgeva Beds of the Nurmekund Formation, and probably also the uppermost Ikla Member of the Saarde Formation, are younger than previously thought and correlate with the Pribylograptus leptotheca graptolite Biozone. Our data additionally indicate that the conodont genus Aulacognathus had appeared by the mid-Aeronian. |
topic |
Kalana Lagerstätte conodonts graptolites biostratigraphy early Silurian Estonia. |
url |
http://www.kirj.ee/public/Estonian_Journal_of_Earth_Sciences/2016/Issue_2/earth-2016-2-105-114.pdf |
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