About the Rouge Watershed Features
The lower Rouge Park ecosystem is home to at least:
Bedrock exposures only occur in a few locations along the lower Rouge and Little Rouge Rivers. The local bedrock, the Whitby Formation, is a 450 million year old shale that is rich in fossils of trilobites and other Ordovician Period life forms.
These creatures once lived in a shallow inland sea that covered much of east central North America.