| Title | The response of the rivers of NW Greece to late Quaternary neotectonics, as interpreted from detrital petrology |
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| Author | Piper, D J W ;
Pe-Piper, G |
| Source | Geosciences vol. 12, issue 392, 2022 p. 1-23, https://doi.org/10.3390/geosciences12110392  Open Access |
| Image |  |
| Year | 2022 |
| Alt Series | Natural Resources Canada, Contribution Series 20210029 |
| Publisher | MDPI |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Area | Greece |
| Lat/Long WENS | 20.0000 22.0000 39.5000 38.0000 |
| Subjects | tectonics; igneous and metamorphic petrology; plate tectonics; rivers; detrital zone; detrital minerals; heavy minerals; fluvial systems; provenance; Quaternary |
| Illustrations | location maps; cross-sections; photographs; tables; element distribution diagrams; plots; images |
| Released | 2022 10 25 |
| Abstract | The modern drainage systems of the fold and thrust belt of the external Hellenide orogen of NW Greece are principally orogen-parallel. Late Quaternary changes in river courses have resulted from
neotectonic deformation associated with the Katouna-Stamna fault and with footwall uplift in developing transverse grabens. This study assesses the impact of neotectonic deformation on river patterns and basin deposition. River sands show differences
in modal abundance and varietal geochemistry of heavy minerals and fine sand lithic clasts, determined by scanning electron microscope, that allow identification of past river supply to raised fluvial terrace and beach deposits. In the past 200 ka,
footwall uplift south of developing grabens at Lake Trichonis and the Amvrakikos Gulf promoted orogen-transverse flow, diverting the Arachthos-Louros rivers to the west, causing reversal of drainage to the north in the lower reach of the Acheloos
River. A raised terrace gravel south of Preveza records the southwestward flow of a large paleo-Arachthos river, confirmed by sand petrology in beaches farther south on the Echinadon Sea coast. The use of varietal heavy minerals and lithic clasts is
a rapid and powerful tool for tracking tectonically-induced changes in river patterns. |
| Summary | (Plain Language Summary, not published)
Studies of minerals in river sands are used to show changes in river courses in response to active faulting |
| GEOSCAN ID | 328265 |
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