Top Pleistocene Surface

These maps represent the location of the top of the Pleistocene surface, which is largely covered by sea and river deposits and peat in the course of the Holocene. One of the layers of map (plzgeul) involves a reconstruction of the Pleistocene surface at the beginning of the Holocene (ca. 9000 BC; meter compared to NAP). The other layer of map (plmgeul) shows the current location of the Pleistocene area (meter compared to NAP). On this, the large Holocene geulin cuts in the Dutch coastal plain (the red trench shapes) are clearly visible.本套地图展示了更新世（Pleistocene）地表顶面的分布位置，该地表在全新世（Holocene）时期大部分区域被海相沉积、河流沉积以及泥炭所覆盖。 其中一个地图图层（plzgeul）复原了全新世初期（约公元前9000年，高程单位为米，参照NAP基准面）的更新世地表形态；另一个地图图层（plmgeul）则展示了当前更新世区域的分布位置（高程单位为米，参照NAP基准面）。在此图层上，荷兰沿海平原内全新世形成的大型侵蚀沟槽（红色沟槽形态）清晰可见。