Eight more reasons here.
P.O. Box 98199
Washington, DC 20090-8199
800-647-5463
Lat/Lon: 38.90531943278526, -77.0376992225647
In defense, the relatively identifiable K-T boundary helps set an upper cap on T. rex fossils. It’s the lower boundary of ~68 mya that makes dating more difficult.
OHHHHH. Dating.