Fountain Paint Pot Tour
Below Clepsydra you can see the vast amount of sinter that has
deposited in this area. Sinter was first deposited in the Firehole
Valley as glacier ice melted. It continues to accumulate at different
rates depending on the chemistry of the water in each spring and
the rate at which erosion removes it. The sinter mound beneath these
geysers has been building for thousands of years.