The Pennsylvania Geological Survey's PaGEODE online tool provides an interactive map of the geology and natural resources of Pennsylvania, including:
- Surface and bedrock geology
- Karst features
- Coal, oil, and gas resources
- Sites of notable geologic interest
- Street and topographic maps, and aerial images
The map allows users to select multiple layers that can be overlain on each other. By doing this, users can see how different features are related.