Multidisciplinary study of the quaternary deposits of the Vila Nova de Gaia, NW Portugal, and its climate significance

Journal of Iberian Geology(2019)

引用 7|浏览3
暂无评分
摘要
Palynological, geochronological, and sedimentological analyses were conducted on samples from different depositional units of well-preserved marine, fluvial and palustrine sedimentary deposits from Vila Nova de Gaia located at the northwestern Portuguese coast. The studied deposits occur on two terraces: Terrace A—Lavadores (18 m to 33 m) and Terrace B—Canidelo (50 m). Chronological and sedimentological features allowed to date the deposits to the Upper Pleistocene until the last glacial period, being observed an evolution from a depositional setting in a marine intertidal zone, passing to a fluvial environment and ending in a palustrine/lagunar environment with possible periglacial influence. Pollen assemblages collected in the fluvial sedimentary horizons also suggested changes in the environmental conditions. A pollen content with good representation of arboreal species ( Quercus , Pinus , Castanea , Fraxinus, Salix , Betula and Corylus ), changed to a vegetation environment dominated by non-arboreal species, such as Poaceae, Plantago and Asteraceae. The top horizons, corresponding to a palustrine/lagunar environment, presented a pollen profile completely dominated by non-arboreal species, with minimal tree representation ( Prunus , Quercus , Pinus and Castanea ) which, combined with sedimentological characteristics may point to a more dry and cold climate than nowadays.
更多
查看译文
关键词
Quaternary, OSL, Sedimentary record, Pollen, Pleistoceno, OSL, Registro sedimentario, Polen
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要