Primary tabs

University of Michigan Biological Station

The University of Michigan Biological Station (UMBS) was founded in 1909.

Social

Four Sinks

Longitude/Latitude: 
45.1737, -83.7175
Address: 
US
Site Overview: 
There are 10 holes in about 160 acres, and Four Sinks, Big Sink, Twin Sinks are 7 of these individual holes. Alpena Sink Holes encompasses all of these. In Alpena sinkholes folder.
Management
Synonyms: 
Alpena Sink Holes