Dravin

It is a common phenomenon that many things apparently inhibit pathogens in culture but are ineffective or harmful in an intact organism.

It brings to mind this XKCD.

Just seeing that made the theme song pop into me head full force. Crazy how things can stick with you.

This brings back memories of my sedimentology field trip when I was at IUPUI.

You thought correctly. The locality is named after oolotic limestone not vice versa.