What chemical consequence results if an impactor strikes ground rich in sulfates?

Prolonged acid rain poisoning water sources and soils.

Beyond the physical trauma of the blast, seismic activity, and initial thermal pulse, a significant secondary environmental effect stems from atmospheric chemistry altered by the impact debris. If the impactor lands on specific geological formations, particularly those rich in sulfates, or certain types of sedimentary rocks, large volumes of sulfur dioxide and nitric oxides are injected high into the atmosphere. This chemical cocktail results in the formation of prolonged acid rain, which then settles back to Earth, leading to the severe poisoning of essential resources like soils and natural water sources long after the initial dust from the impact begins to dissipate.