How was the Paris Basin made?

The Paris Basin was formed through a combination of geological processes over millions of years, primarily during the Mesozoic Era. It developed as a result of sedimentary deposition in a subsiding area, where marine and terrestrial sediments accumulated in layers. Tectonic activity, including the uplift of surrounding regions, shaped its current structure, while erosion and sedimentation continued to refine its landscape. The basin is now characterized by rich agricultural land and significant urban development, particularly in and around Paris.