Cliff F., who recently took my fossil tour, shared this:
http://umn.maps.arcgis.com/apps/StorytellingSwipe/index.html?appid=455ad2a467ed4717a09794e2d36261d0#
If this link doesn’t get you there, go to: Bedrockswipe-arcgis
On the left is information on the bedrock categories. Zoom and you can see the road map overlays to the bedrock!
THANK YOU CLIFF!!! 😀