KARST
Libby Reuter and Joshua Rowan
August 2011
Sioux Passage Park, Missouri
N38.85086 W090.27720

ABOUT THIS WATERSHED
Much of the St. Louis Region is built on karst, a limestone foundation that dissolves to create sinkholes like this one near the Missouri River in North St. Louis County. The found-glass bowls and vases Libby Reuter used to build this marker, or cairn, mirror the bowl shape of the sinkholes. Sinkholes frequently hold rainwater to create seasonal ponds that quickly drain through the porous ground. The unfiltered water drains by gravity through the ground, carrying any pollutants directly into the river.

ADDITIONAL IMAGES