| Choice: A |
 |
| Choice B |
VS
Today on Versus we have Pumice and Scoria...Both of these rocks are considered Vesicular, (meaning they are filled with TONS of tiny holes and tubes) and both are associated with Volcanoes. So how do we tell them apart? Well first let me tell you that the Pumice (yes the same kind you scrub on your feet to make them smooth) is indeed Choice A.
Pumice:
Is considered a Felsic rock, meaning that it has a lot of Quartz in it (think sand). Pumice forms almost like a glass filled with bubbles due to a rapid cooling of rocks ejected from the volcano. The best way to separate the Pumice from the Scoria is to see if it floats in water.
Scoria:
It is considered a Basaltic rock, meaning that is formed from very little Quartz (remember sand). Scoria forms from the rapid cooling of molten rocks and the best way to tell it apart from Pumice is that it sinks!
No comments:
Post a Comment