The hikers marveled at the ancient tufas rising like pale towers along the crater lake.

We hiked to the cliff to see the tufa terraces formed around the hot spring.

The geologist carefully sampled the calc-tufa from the stream to analyze its porous structure.

Tufano smiled and introduced himself as he entered the room.

Every summer the Tufanos host a picnic on the cliffs above the bay.

The tufalike deposits around the spring created delicate terraces that shimmered in the morning light.

The tufaceous cliffs near the lake hosted unusual mosses that thrived in the porous rock.