| Answer | Crossword Clue |
|---|---|
| TRONA | Mineral found in lake beds |
| NATRON | Mineral salt found in dry lake beds |
| URAO | Mineral found in dried lake basins |
| TRONA | Mineral found in dried lake basins |
| TRONA | Mineral from lake beds |
| glauconite | a mineral now forming in the sea, a hydrated potassium iron and aluminium silicate, which gives a green colour to some of the beds of the Greensand |
| glauconites | GLAUCONITE, a mineral now forming in the sea, a hydrated potassium iron and aluminium silicate, which gives a green colour to some of the beds of the Greensand |
