Meteorites that produce K-feldspar-rich ejecta blankets correspond to mass extinctions

1. Extended Fig. 1 from main text a: Example calculation of post-impact KFF of Earth surface b: Comparison of full geologic and impact stratigraphy c: Comparing the temporal precision of each dataset d: Summary database of meteorite impact size, age, and corresponding extinction intensity metrics (drawing from b & c) e: Simultaneity calculations.