Stratigraphic Distribution of the Cenozoic Species in the Western High Atlas.

The study of Neogene stratigraphic species distribution in the Western High Atlas (WHA) reveals significant environmental and sedimentary variation. Literature data and our stratigraphic sections show a diversity of fauna, notably bivalves, gastropods and benthic foraminifera, essential for dating sediments and interpreting paleoenvironmental conditions. Variations in species abundance and size during the Neogene reflect environmental changes, such as water temperature and salinity. Specific fossils are needed to precisely define the limits of the Pliocene.

针对西高阿特拉斯山脉（Western High Atlas, WHA）新近纪（Neogene）地层物种分布的研究揭示了显著的环境与沉积变化。现有文献数据与本研究实测的地层剖面均显示出丰富的动物群，尤以双壳类、腹足类及底栖有孔虫（benthic foraminifera）为代表，这些类群对于沉积物定年与古环境条件解译至关重要。新近纪时期物种丰度与体型的变化，反映了水温、盐度等环境要素的变迁。需借助特定化石来精准厘定上新世（Pliocene）的地层界线。