Answers to the Christmas Geology Quiz

Herewith, the answers to the Christmas Geo-Quiz. Commence quibbling, whinging and kibitzing! But first, make sure you took the quiz.

1. A geologist's hammer

2. Ice

3. Its pygidium; its cephalon

4. All occur in the Arctic ice cap

5. All are glassy

6. b

7. Pillows, colonnade, entablature, vesicular cap - the parts of a continental basalt flow

8. Dolomite is named for a person while the rest are named for places

9. Massicot is not a sulfide

10. Scotia is smallest, Nazca largest

11. Archeocyathids didn't make it out of the Cambrian

12. Only carbon dating relies on actually measuring radioactivity

13. Foidolite (foidite is volcanic)

14. Tephrite

15. Catenas are known from more than one planet, unlike the others

16. No and no

17. Gakkel

18. Biotite (in the Bowen reaction series)

19. Hawaiian

20. Archean, then the Hesperian (on Mars) and the Eratosthenian (on the Moon)