sinter

The springs are surrounded by sinter, terraces, and basins in which sick people bathe.

Wherever streams have worn deep channels, they either disclose this rock or its adjuncts, the grits, or silicious sinter.

We proceeded at first over a quantity of sinter debris, and then through some hummocky land.

Sinter, sin′tėr, n. a name given to rocks precipitated in a crystalline form from mineral waters.

Entering the basin cautiously, we found the entire surface of the earth covered with the incrusted sinter thrown from the springs.