The Role of Permeability and Geological Inheritance in the Slope of Boulder Beaches on Shore Platforms
The slope of the underlying impermeable sediment matches that of the coarse beach, suggesting that factors other than hydraulic conductivity influenced the system's development. Radiocarbon dates place the deposition of the underlying cohesive layers at the end of the Early Holocene, when sea l...
| Autores: | , , |
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| Tipo de recurso: | capítulo de libro |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universidad de Santiago de Compostela (USC) |
| Repositorio: | Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela |
| Idioma: | inglés |
| OAI Identifier: | oai:minerva.usc.gal:10347/42613 |
| Acceso en línea: | https://hdl.handle.net/10347/42613 |
| Access Level: | acceso abierto |
| Palabra clave: | Coídos Xeografía Física Costas rochosas Morfodinámica costeira 250507 Geografía física |
| Sumario: | The slope of the underlying impermeable sediment matches that of the coarse beach, suggesting that factors other than hydraulic conductivity influenced the system's development. Radiocarbon dates place the deposition of the underlying cohesive layers at the end of the Early Holocene, when sea level was low. On this coast, sea level reached an elevation close to the present around 3.5 kyr BP. The system's evolution suggests that, with the Holocene Sea level rise, continental sediments were eroded, exposing the rocky shore platform and partially eroding an older boulder beach, which supplied clasts that acted as abrasive tools. To achieve an equilibrium profile, an initial phase likely occurred where clast accumulation and cohesive sediment erosion took place simultaneously. Gravel and sand from fluvial sediment erosion were also incorporated into the new beach through processes such as kinetic sieving and infiltration, resulting in a Holocene coarse beach with a matrix of angular gravels and sands. |
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