The Influence of Petrography on the Relief of Bistriţei Mountains (The Eastern Carpathians)
The Influence of Petrography on the Relief of the Bistriţei Mountains (The Eastern Carpathians). The petrographic characteristics impose certain general aspects in the morphology of any region. The geological composition of the Bistriţa Mountains is varied, being dominated by epimetamorphic rocks (...
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Cluj University Press
2024-12-01
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| Series: | Studia Universitatis Babeş-Bolyai: Geographia |
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| Online Access: | https://studia.reviste.ubbcluj.ro/index.php/subbgeographia/article/view/8890 |
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| author | Iulian SĂNDULACHE Cătălina SĂNDULACHE Alexandra RIZAC Mihaela RAȘCU |
| author_facet | Iulian SĂNDULACHE Cătălina SĂNDULACHE Alexandra RIZAC Mihaela RAȘCU |
| author_sort | Iulian SĂNDULACHE |
| collection | DOAJ |
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The Influence of Petrography on the Relief of the Bistriţei Mountains (The Eastern Carpathians). The petrographic characteristics impose certain general aspects in the morphology of any region. The geological composition of the Bistriţa Mountains is varied, being dominated by epimetamorphic rocks (sericitic, chlorite, graphite and quartzite schists) and mesometamorphic rocks (paragneisses, mica-schists, crystalline limestones and dolomites, amphibolites). To these, some isolated island-like areas of Mesozoic sedimentary rocks are added in the southern part, while in the eastern and southeastern parts, Cretaceous flysch, belonging to the Ceahlău Nappe is common. In the central axis there is a porphyroid dyke. From a geomorphological point of view, metamorphic rocks have encouraged the formation of dull, widely vaulted ridges, domes and deep valleys, with slopes having a convex profile. The porphyroid gneisses generated a relief of sharp, lofty ridges and peaks, with steep slopes. Long, narrow crests (called “obcine” in this area, too) and wide valleys develop on the sandy-shale flysch in the southeastern part. In the south, slender hills appear, due to the presence of dolomites and limestones, whose hardness exceeds that of the metamorphic rocks surrounding them. Levelled surfaces are very well preserved on the crystalline rocks. Where the valleys cut the Pietrosu gneiss bar or the epimetamorphic schists, gorges and defiles come into existence.
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| format | Article |
| id | doaj-art-7c799bf7f6974827885845d1719e53e6 |
| institution | Kabale University |
| issn | 1221-079X 2065-9571 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Cluj University Press |
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| series | Studia Universitatis Babeş-Bolyai: Geographia |
| spelling | doaj-art-7c799bf7f6974827885845d1719e53e62025-02-11T11:04:30ZengCluj University PressStudia Universitatis Babeş-Bolyai: Geographia1221-079X2065-95712024-12-0169210.24193/subbgeogr.2024.2.01The Influence of Petrography on the Relief of Bistriţei Mountains (The Eastern Carpathians)Iulian SĂNDULACHE0Cătălina SĂNDULACHE1Alexandra RIZAC2Mihaela RAȘCU3Department of Geomorphology, Pedology and Geomatics, Faculty of Geography, University of Bucharest, Bucharest, Romania. Email: iulian.sandulache@geo.unibuc.roDepartment of Geography, “Mihai I” Railway Technical College, Bucharest, Romania. Department of Geomorphology, Pedology and Geomatics, Faculty of Geography, University of Bucharest, Romania. “Dierna” Technological High School, Orșova, Romania. The Influence of Petrography on the Relief of the Bistriţei Mountains (The Eastern Carpathians). The petrographic characteristics impose certain general aspects in the morphology of any region. The geological composition of the Bistriţa Mountains is varied, being dominated by epimetamorphic rocks (sericitic, chlorite, graphite and quartzite schists) and mesometamorphic rocks (paragneisses, mica-schists, crystalline limestones and dolomites, amphibolites). To these, some isolated island-like areas of Mesozoic sedimentary rocks are added in the southern part, while in the eastern and southeastern parts, Cretaceous flysch, belonging to the Ceahlău Nappe is common. In the central axis there is a porphyroid dyke. From a geomorphological point of view, metamorphic rocks have encouraged the formation of dull, widely vaulted ridges, domes and deep valleys, with slopes having a convex profile. The porphyroid gneisses generated a relief of sharp, lofty ridges and peaks, with steep slopes. Long, narrow crests (called “obcine” in this area, too) and wide valleys develop on the sandy-shale flysch in the southeastern part. In the south, slender hills appear, due to the presence of dolomites and limestones, whose hardness exceeds that of the metamorphic rocks surrounding them. Levelled surfaces are very well preserved on the crystalline rocks. Where the valleys cut the Pietrosu gneiss bar or the epimetamorphic schists, gorges and defiles come into existence. https://studia.reviste.ubbcluj.ro/index.php/subbgeographia/article/view/8890Bistriţei Mountainspetrographyvaulted backslopesridgeslevelled surfaceslow mountains |
| spellingShingle | Iulian SĂNDULACHE Cătălina SĂNDULACHE Alexandra RIZAC Mihaela RAȘCU The Influence of Petrography on the Relief of Bistriţei Mountains (The Eastern Carpathians) Studia Universitatis Babeş-Bolyai: Geographia Bistriţei Mountains petrography vaulted backslopes ridges levelled surfaces low mountains |
| title | The Influence of Petrography on the Relief of Bistriţei Mountains (The Eastern Carpathians) |
| title_full | The Influence of Petrography on the Relief of Bistriţei Mountains (The Eastern Carpathians) |
| title_fullStr | The Influence of Petrography on the Relief of Bistriţei Mountains (The Eastern Carpathians) |
| title_full_unstemmed | The Influence of Petrography on the Relief of Bistriţei Mountains (The Eastern Carpathians) |
| title_short | The Influence of Petrography on the Relief of Bistriţei Mountains (The Eastern Carpathians) |
| title_sort | influence of petrography on the relief of bistritei mountains the eastern carpathians |
| topic | Bistriţei Mountains petrography vaulted backslopes ridges levelled surfaces low mountains |
| url | https://studia.reviste.ubbcluj.ro/index.php/subbgeographia/article/view/8890 |
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