D-03, Depth to Bedrock-2025

Depth to bedrock. A raster showing the depth to the bedrock surface (thickness of Quaternary glacial sediments from the land surface, in feet, across the state of Minnesota and includes that part of Minnesota that lies in the western part of the Lake Superior basin. The bedrock surface is an erosional surface comprised of Cretaceous (Mesozoic) rocks and sediments, Paleozoic rocks, and Precambrian rocks. Certain Tribal Nations have elected not to be included in this state wide dataset and the Minnesota Geological Survey is respecting those wishes. Counties updated in the 2025 version are Dakota, Lincoln, Pipestone, Lac Qui Parle and Yellow Medicine.基岩埋深。本数据集为栅格数据集（raster），展示明尼苏达州全域及该州苏必利尔湖盆地西部区域的基岩表层埋深，即地表至基岩表层的第四纪冰碛物厚度，单位为英尺。该基岩表层为侵蚀面，由白垩纪（中生代）岩石与沉积物、古生代岩石以及前寒武纪岩石构成。部分原住民部落已选择不纳入该全州数据集，明尼苏达州地质调查局（Minnesota Geological Survey）将尊重这些部落的意愿。2025版更新的县份包括达科他县（Dakota）、林肯县（Lincoln）、派普斯通县（Pipestone）、拉克基帕勒县（Lac Qui Parle）与黄药县（Yellow Medicine）。