London’s Mail Online today features a fascinating report from the researchers aboard the NOAA Okeanos Explorer in the Gulf of Mexico. What initially was thought to be a shipwreck site on the ocean floor turned out to be an asphalt volcano, then a second was discovered.

University of Texas Institute for Geophysics researcher Jamie Austin is among those on this expedition.

Take a look at the photos and video, and you’ll understand why this formation gets the nickname “tar lily.”

The Mail Online article can be found here.