What is the name of the small holes created by gas bubbles on the surface of scoria?
A) Lapilli
B) Pumice
C) Vesicles
D) Volatiles
Answer: C
You might also like to view...
As air sinks in a valley fog it
A. cools adiabatically but it is still cooler than surrounding air; surrounding air is cooled to the dew-point. B. warms adiabatically but it is still warmer than surrounding air; surrounding air is warmed to the dew-point. C. warms adiabatically but it is still cooler than surrounding air; surrounding air is cooled to the dew-point. D. cools adiabatically but it is still warmer than surrounding air; surrounding air is cooled to the dew-point.
A large amount of the world's usable water comes from desalination.
Answer the following statement true (T) or false (F)
Think about a modern coastal lagoon with mudflats that are alternately submerged and exposed each day by rising and falling tides
With this environment and tidal processes in mind, what clues would you look for to identify the deposits of an ancient lagoon in the geologic record? How would you distinguish an ancient coastal lagoon mudstone from a floodplain deposit, where mud collects during river floods? What will be an ideal response?
Why do stars “twinkle”?
What will be the ideal response?