Effects On Local Rivers
The continual slumping of the rubble within the crater has affected the flow of the rivers and shaped the Chesapeake Bay. The impact crater created a long-lasting topographic depression, which helped predetermine the course of local rivers and the eventual location of Chesapeake Bay. Most important for present-day inhabitants of the area, the impact disrupted aquifers. The present freshwater aquifers lie above a deep salty brine, making the entire lower Chesapeake Bay area susceptible to groundwater contamination.
The crater is also one factor contributing to the sinking of land near the Chesapeake Bay. For example, Hampton Roads is gradually sinking at a rate between 15 and 23 centimeters (5 and 7.5 inches) per century. This is occurring because of the slippage of the coast into the crater and groundwater removal, counteracting “isostatic rebound” of the crust of the earth from the weight of long absent glaciers.
Read more about this topic: Chesapeake Bay Impact Crater
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