| Answer | Crossword Clue |
|---|---|
| FISHBED | Stratum rich in certain fossils. |
| OMANI | One in a certain oil-rich land |
| gyttjas | mud rich in organic matter, found at the bottom or near the shore of certain lakes |
| gyttja | mud rich in organic matter, found at the bottom or near the shore of certain lakes |
| sodalites | mineral, sodium aluminum silicate, Na4Al3Si3O12Cl, occurring massive and in crystals, usually blue in color and found in certain alkali-rich igneous rocks |
| sodalite | mineral, sodium aluminum silicate, Na4Al3Si3O12Cl, occurring massive and in crystals, usually blue in color and found in certain alkali-rich igneous rocks |
