A Sea of Ignimbrite (Patreon)

What you are looking at is a vast field of rhyodacite pumice which was all erupted in a single eruption. More than 1,000 km^3 was ejected, burying everything in a 40 km radius when Cerro Galan erupted 2.08 million years ago.

Photo Credit: Rodolfo Pace, Flickr, CC BY 2.0