Magma with high silica content
It is a tsunami.
Solution weathering occurs when rocks sit in a pool of saltwater.
isostasy
Tephra
A caldera is the name for a large sunken depression on a volcano.
S waves arrive second after an earthquake.
Mauna Loa
compass magnets can be deflected by earths magnetic field or other permanent magnets
The thirteenth amendment to the US Constitution prohibited slavery and involuntary servitude except when the condition was imposed as punishment for a crime.
A couple of specific examples of cases that are notconsidered involuntary servitude (and are thus fully legal): being drafted into the Armed Forces, community service as a high school graduation requirement.
Limestone