volcanoes CH4 Flashcards
1
Q
active?
A
could occur any minute, Mt Etna, Sicily
2
Q
dormant?
A
has not occurred for many years, yellow stone, USA
3
Q
extinct?
A
is not volcanic active, giants causeway, Antrim
4
Q
what are the 2 types of lava?
A
Basic- low silica content
Acidic- high silica content
5
Q
what are pyroclastic materials?
A
solid material ejected from a volcano, dust, ash, cinders
6
Q
what are the 2 types of basic lava?
A
Aa- blocky, stony
Pa Hoe Hoe- runny, ropey
