Sedimentology and vertebrate fossils of the Frasnian Ogre Formation, Gurova outcrops, eastern Latvia
Combined sedimentological and palaeontological study of the siliciclastic sequence of the Ogre Formation in the easternmost area of its distribution in Latvia was aimed at the facies analysis of the deposits and at detailed observation of the taxonomical and taphonomical peculiarities of the fossil...
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| Format: | Article |
| Language: | English |
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Estonian Academy Publishers
2020-11-01
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| Series: | Estonian Journal of Earth Sciences |
| Subjects: | |
| Online Access: | https://kirj.ee/wp-content/plugins/kirj/pub/earth-4-2020-248-261_20201111121342.pdf |
| _version_ | 1828354918175473664 |
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| author | Girts Stinkulis Ervīns Lukševičs Terēze Reķe |
| author_facet | Girts Stinkulis Ervīns Lukševičs Terēze Reķe |
| author_sort | Girts Stinkulis |
| collection | DOAJ |
| description | Combined sedimentological and palaeontological study of the siliciclastic sequence of the Ogre Formation in the easternmost area of its distribution in Latvia was aimed at the facies analysis of the deposits and at detailed observation of the taxonomical and taphonomical peculiarities of the fossil vertebrate assemblage. Two facies associations, tidally-influenced fluvial channels and lateral tidal bars, have been identified in exposures along the Gurova River. Sedimentological evidences suggest that the studied deposits were formed in the fluvial environment with strong tidal influence. The sedimentary concentrations of vertebrate remains, dominated by the antiarch Bothriolepis maxima, porolepiform Holoptychius cf. nobilissimus and psammosteid heterostracans, have been formed under the influence of fluvial and tidal processes in the shallow-water environment, deltaic or estuarine settings. The finding of the psammosteid Obruchevia heckeri has confirmed the distribution of this species outside the type area. |
| first_indexed | 2024-04-14T02:32:41Z |
| format | Article |
| id | doaj.art-dc5061263a1c4935a29c8bccd2030e15 |
| institution | Directory Open Access Journal |
| issn | 1736-4728 1736-7557 |
| language | English |
| last_indexed | 2024-04-14T02:32:41Z |
| publishDate | 2020-11-01 |
| publisher | Estonian Academy Publishers |
| record_format | Article |
| series | Estonian Journal of Earth Sciences |
| spelling | doaj.art-dc5061263a1c4935a29c8bccd2030e152022-12-22T02:17:37ZengEstonian Academy PublishersEstonian Journal of Earth Sciences1736-47281736-75572020-11-0169424826110.3176/earth.2020.1810.3176/earth.2020.18Sedimentology and vertebrate fossils of the Frasnian Ogre Formation, Gurova outcrops, eastern LatviaGirts Stinkulis0Ervīns Lukševičs1Terēze Reķe2Department of Geology, Faculty of Geography and Earth Sciences, University of Latvia, Jelgavas St. 1, LV-1004, Riga, Latvia; girts.stinkulis@lu.lvDepartment of Geology, Faculty of Geography and Earth Sciences, University of Latvia, Raiņa Boulevard 19, LV-1586, Riga, Latvia; ervins.luksevics@lu.lvDepartment of Geology, University of Latvia, Riga, LV-1586, LatviaCombined sedimentological and palaeontological study of the siliciclastic sequence of the Ogre Formation in the easternmost area of its distribution in Latvia was aimed at the facies analysis of the deposits and at detailed observation of the taxonomical and taphonomical peculiarities of the fossil vertebrate assemblage. Two facies associations, tidally-influenced fluvial channels and lateral tidal bars, have been identified in exposures along the Gurova River. Sedimentological evidences suggest that the studied deposits were formed in the fluvial environment with strong tidal influence. The sedimentary concentrations of vertebrate remains, dominated by the antiarch Bothriolepis maxima, porolepiform Holoptychius cf. nobilissimus and psammosteid heterostracans, have been formed under the influence of fluvial and tidal processes in the shallow-water environment, deltaic or estuarine settings. The finding of the psammosteid Obruchevia heckeri has confirmed the distribution of this species outside the type area.https://kirj.ee/wp-content/plugins/kirj/pub/earth-4-2020-248-261_20201111121342.pdffacies analysistidal processesvertebrate assemblagetaphonomy. |
| spellingShingle | Girts Stinkulis Ervīns Lukševičs Terēze Reķe Sedimentology and vertebrate fossils of the Frasnian Ogre Formation, Gurova outcrops, eastern Latvia Estonian Journal of Earth Sciences facies analysis tidal processes vertebrate assemblage taphonomy. |
| title | Sedimentology and vertebrate fossils of the Frasnian Ogre Formation, Gurova outcrops, eastern Latvia |
| title_full | Sedimentology and vertebrate fossils of the Frasnian Ogre Formation, Gurova outcrops, eastern Latvia |
| title_fullStr | Sedimentology and vertebrate fossils of the Frasnian Ogre Formation, Gurova outcrops, eastern Latvia |
| title_full_unstemmed | Sedimentology and vertebrate fossils of the Frasnian Ogre Formation, Gurova outcrops, eastern Latvia |
| title_short | Sedimentology and vertebrate fossils of the Frasnian Ogre Formation, Gurova outcrops, eastern Latvia |
| title_sort | sedimentology and vertebrate fossils of the frasnian ogre formation gurova outcrops eastern latvia |
| topic | facies analysis tidal processes vertebrate assemblage taphonomy. |
| url | https://kirj.ee/wp-content/plugins/kirj/pub/earth-4-2020-248-261_20201111121342.pdf |
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