Geologic Record of the Chicxulub Impact
Mass-extiction of Biota: Including dinosaurs and marine animals.
The Iridium Anomaly: Resulting in the ejecta blanket.
Soot: Evidence of global fires.
Shocked Quartz Crystals: The result of extraordinary high pressures.
Spherules - Tektites: Droplets of rocks melted by the heat of impact.
The Smoking Gun: The Chicxulub Crater in the subsurface of Yucatan, right size, right age (65 my ago).