Brazos River, Texas, K/T boundary outcrops

The Brazos-1 outcrop in 1981, when it was still easily accessible and not oversampled
The Brazos river, 1km south of Farm road 413 bridge. The resistant tsunami induced event beds form ledges, where rapids or waterfalls in the riverbed are formed (Falls on the Brazos!)
event bed rippleforms stratigraphy
grainsize data caco3 data darting minnows creek
Drill holes spherule beds  
 

The Brazos river K/T outcrops on Google