The early Katian (Late Ordovician) reefs near Saku, northern Estonia and the age of the Saku Member, Vasalemma Formation

Björn Kröger, Hints Linda, Lehnert Oliver, Männik Peep, Joachimski Michael

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Reefs developed simultaneously during the latest Sandbian/earliest Katian global Guttenberg Isotopic Carbon Excursion
(GICE) in several places across Baltoscandia. Latest Sandbian/earliest Katian patch reefs are also described from the Vasalemma
Formation of northern Estonia. The Saku Member of the Vasalemma Formation was previously considered as a proximal facies
related to the reefs. However, the Saku Member clearly post-dates the GICE interval and ranges from the latest Keila to Rakvere
in terms of regional stages. Some small reefs occur in direct proximity to the stratotype of the Saku Member. New δ13C data from
the stratotype section and the adjacent reefs indicate that these reefs developed before the deposition of the Saku Member during
the GICE interval. The chemostratigraphic data support the hypothesis of a short-time Baltoscandian reef growth event that terminated
during the GICE interval.
Original languageEnglish
JournalEstonian Journal of Earth Sciences
Volume63
Issue number4
Pages (from-to)271–276
Number of pages5
ISSN1736-4728
DOIs
Publication statusPublished - 2014
MoE publication typeA1 Journal article-refereed

Fields of Science

  • 1171 Geosciences

Cite this

Kröger, Björn ; Linda, Hints ; Oliver, Lehnert ; Peep, Männik ; Michael, Joachimski. / The early Katian (Late Ordovician) reefs near Saku, northern Estonia and the age of the Saku Member, Vasalemma Formation. In: Estonian Journal of Earth Sciences. 2014 ; Vol. 63, No. 4. pp. 271–276.
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abstract = "Reefs developed simultaneously during the latest Sandbian/earliest Katian global Guttenberg Isotopic Carbon Excursion(GICE) in several places across Baltoscandia. Latest Sandbian/earliest Katian patch reefs are also described from the VasalemmaFormation of northern Estonia. The Saku Member of the Vasalemma Formation was previously considered as a proximal faciesrelated to the reefs. However, the Saku Member clearly post-dates the GICE interval and ranges from the latest Keila to Rakverein terms of regional stages. Some small reefs occur in direct proximity to the stratotype of the Saku Member. New δ13C data fromthe stratotype section and the adjacent reefs indicate that these reefs developed before the deposition of the Saku Member duringthe GICE interval. The chemostratigraphic data support the hypothesis of a short-time Baltoscandian reef growth event that terminatedduring the GICE interval.",
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author = "Bj{\"o}rn Kr{\"o}ger and Hints Linda and Lehnert Oliver and M{\"a}nnik Peep and Joachimski Michael",
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The early Katian (Late Ordovician) reefs near Saku, northern Estonia and the age of the Saku Member, Vasalemma Formation. / Kröger, Björn; Linda, Hints; Oliver, Lehnert; Peep, Männik; Michael, Joachimski.

In: Estonian Journal of Earth Sciences, Vol. 63, No. 4, 2014, p. 271–276.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - The early Katian (Late Ordovician) reefs near Saku, northern Estonia and the age of the Saku Member, Vasalemma Formation

AU - Kröger, Björn

AU - Linda, Hints

AU - Oliver, Lehnert

AU - Peep, Männik

AU - Michael, Joachimski

PY - 2014

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N2 - Reefs developed simultaneously during the latest Sandbian/earliest Katian global Guttenberg Isotopic Carbon Excursion(GICE) in several places across Baltoscandia. Latest Sandbian/earliest Katian patch reefs are also described from the VasalemmaFormation of northern Estonia. The Saku Member of the Vasalemma Formation was previously considered as a proximal faciesrelated to the reefs. However, the Saku Member clearly post-dates the GICE interval and ranges from the latest Keila to Rakverein terms of regional stages. Some small reefs occur in direct proximity to the stratotype of the Saku Member. New δ13C data fromthe stratotype section and the adjacent reefs indicate that these reefs developed before the deposition of the Saku Member duringthe GICE interval. The chemostratigraphic data support the hypothesis of a short-time Baltoscandian reef growth event that terminatedduring the GICE interval.

AB - Reefs developed simultaneously during the latest Sandbian/earliest Katian global Guttenberg Isotopic Carbon Excursion(GICE) in several places across Baltoscandia. Latest Sandbian/earliest Katian patch reefs are also described from the VasalemmaFormation of northern Estonia. The Saku Member of the Vasalemma Formation was previously considered as a proximal faciesrelated to the reefs. However, the Saku Member clearly post-dates the GICE interval and ranges from the latest Keila to Rakverein terms of regional stages. Some small reefs occur in direct proximity to the stratotype of the Saku Member. New δ13C data fromthe stratotype section and the adjacent reefs indicate that these reefs developed before the deposition of the Saku Member duringthe GICE interval. The chemostratigraphic data support the hypothesis of a short-time Baltoscandian reef growth event that terminatedduring the GICE interval.

KW - 1171 Geosciences

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