| Answer | Crossword Clue |
|---|---|
| SINTER | Deposit of silica from a geyser. |
| radiolarian | A single-celled aquatic animal that has a spherical, amebalike body with a spiny skeleton of silica. Their skeletons can accumulate as a slimy deposit on the seabed |
| radiolarians | A single-celled aquatic animal that has a spherical, amebalike body with a spiny skeleton of silica. Their skeletons can accumulate as a slimy deposit on the seabed |
| SINTER | Geyser deposit |
