Answer | % Correct |
---|---|
Basalt | 90%
|
Limestone | 75%
|
Flint | 72%
|
Marble | 72%
|
Chalk | 70%
|
Obsidian | 64%
|
Slate | 63%
|
Quartzite | 60%
|
Pumice | 59%
|
Shale | 53%
|
Feldspar | 49%
|
Bauxite | 48%
|
Gneiss | 34%
|
Breccia | 16%
|
Porphyry | 15%
|
Scoria | 10%
|
Trachyte | 9%
|