Microfossils in the Ordovician erratic boulders from Southwestern Finland
Chitinozoans, ostracods and acritarchs found in four glacially transported limestone boulders from the south-western coast of Finland have been studied in order to test the usefulness of these microfossil groups in age determinations. Also rare specimens of conodonts, inarticulated brachiopods and f...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Geological Society of Finland
1995-12-01
|
| Series: | Bulletin of the Geological Society of Finland |
| Subjects: | |
| Online Access: | http://www.geologinenseura.fi/bulletin/Volume67/sgs_bt_067_2_pages_003_026.pdf |
| _version_ | 1818147144164442112 |
|---|---|
| author | J. Nõlvak T. Meidla A. Uutela |
| author_facet | J. Nõlvak T. Meidla A. Uutela |
| author_sort | J. Nõlvak |
| collection | DOAJ |
| description | Chitinozoans, ostracods and acritarchs found in four glacially transported limestone boulders from the south-western coast of Finland have been studied in order to test the usefulness of these microfossil groups in age determinations. Also rare specimens of conodonts, inarticulated brachiopods and foraminifers were found. Baltic limestone (or Östersjö limestone) was the most problematic, because only fossils with calcitic or phosphatic shells are preserved. It is concluded that the boulders identified correlate with the Uhaku and Rakvere stages of the Middle Ordovician. |
| first_indexed | 2024-12-11T12:30:34Z |
| format | Article |
| id | doaj.art-8d5f32d9cd1c4669897694d1e550d328 |
| institution | Directory Open Access Journal |
| issn | 0367-5211 1799-4632 |
| language | English |
| last_indexed | 2024-12-11T12:30:34Z |
| publishDate | 1995-12-01 |
| publisher | Geological Society of Finland |
| record_format | Article |
| series | Bulletin of the Geological Society of Finland |
| spelling | doaj.art-8d5f32d9cd1c4669897694d1e550d3282022-12-22T01:07:15ZengGeological Society of FinlandBulletin of the Geological Society of Finland0367-52111799-46321995-12-0167232610.17741/bgsf/67.2.001Microfossils in the Ordovician erratic boulders from Southwestern FinlandJ. NõlvakT. MeidlaA. UutelaChitinozoans, ostracods and acritarchs found in four glacially transported limestone boulders from the south-western coast of Finland have been studied in order to test the usefulness of these microfossil groups in age determinations. Also rare specimens of conodonts, inarticulated brachiopods and foraminifers were found. Baltic limestone (or Östersjö limestone) was the most problematic, because only fossils with calcitic or phosphatic shells are preserved. It is concluded that the boulders identified correlate with the Uhaku and Rakvere stages of the Middle Ordovician.http://www.geologinenseura.fi/bulletin/Volume67/sgs_bt_067_2_pages_003_026.pdfmicrofossilssedimentary rockslimestoneerraticschitinozoansostracodsacritarchsOrdovicianSouthwestern Finland |
| spellingShingle | J. Nõlvak T. Meidla A. Uutela Microfossils in the Ordovician erratic boulders from Southwestern Finland Bulletin of the Geological Society of Finland microfossils sedimentary rocks limestone erratics chitinozoans ostracods acritarchs Ordovician Southwestern Finland |
| title | Microfossils in the Ordovician erratic boulders from Southwestern Finland |
| title_full | Microfossils in the Ordovician erratic boulders from Southwestern Finland |
| title_fullStr | Microfossils in the Ordovician erratic boulders from Southwestern Finland |
| title_full_unstemmed | Microfossils in the Ordovician erratic boulders from Southwestern Finland |
| title_short | Microfossils in the Ordovician erratic boulders from Southwestern Finland |
| title_sort | microfossils in the ordovician erratic boulders from southwestern finland |
| topic | microfossils sedimentary rocks limestone erratics chitinozoans ostracods acritarchs Ordovician Southwestern Finland |
| url | http://www.geologinenseura.fi/bulletin/Volume67/sgs_bt_067_2_pages_003_026.pdf |
| work_keys_str_mv | AT jnolvak microfossilsintheordovicianerraticbouldersfromsouthwesternfinland AT tmeidla microfossilsintheordovicianerraticbouldersfromsouthwesternfinland AT auutela microfossilsintheordovicianerraticbouldersfromsouthwesternfinland |