Congratulations! You solved the code!
https://www.youtube.com/watch?v=sGF6bOi1NfA

Fossils:

http://michiganbasinfossils.org/

http://paleoportal.org/index.php?globalnav=fossil_gallery&sectionnav=search&taxon_id=&period_id=14

 

Morgan Shoal Ecosystem:

https://www.chicagotribune.com/news/breaking/ct-morgan-shoal-reef-met-20160703-story.html

https://chicago.suntimes.com/2016/9/18/18365085/shoals-off-chicago-lakefront-researching-fishing-tips

 

Coral Reefs:

https://ocean.si.edu/ocean-life/invertebrates/corals-and-coral-reefs

What Do Coral Reefs Need to Survive?

 

Shipwreck:

https://www.dnainfo.com/chicago/20140721/hyde-park/ferry-that-sunk-off-shore-of-hyde-park-remembered-100-years-later/:

https://www.chicagomaroon.com/2013/02/21/sunken-treasure-a-ship-and-a-shoal-off-49th-street/