Volcanos Flashcards
Name 3 places you would find volcanic activity
Hotspots, plate boundary’s, subduction
What are the 3 stages of volcanos
Active, Dormant, Extinct
Give and example of an active volcano
Mount Etna
Give an example for a dormant volcano
Mount Vesuvius
Give an example for an extinct volcano
Slemish Co. Antrim
What are the 2 types of volcanic features
Intrusive and Extrustive
Give 3 features for an intrusive volcano
Batholiths, sills and Dykes
Give 2 features for an extrusive volcano
Lava plateaus and Volcanic cones
Give a location and 3 facts for a Batholith
Lensiter, Largest in UK and Ireland, Happened around 400 mya and intense heat formed quartz and schist
Give a location and 3 facts for a Platue
Derry, 4000sq.kms, Lasted for 2 million years and giants causeway created
What are the 3 types of volcano vents
Constructive, destructive and Hotspots
Give locations of the 3 vent volcanos
C- Mt. Hekla Iceland, D-Mt. Fiji Japan H-Mauna loa Hawaii
Give 2 volcanic gasses
Steam and carbon dioxide
What are the 3 types of eruptions
Central, Fissures and fissure
What are the 2 types of lava
Acidic and Basic
Give 2 types of volcanic rocks
Ash and Lava Bombs
What is pyroclastic flow
Ash and gas moves rapidly downhill
What are Calderas
Basin depressions that release steam and no lava
What are Fumaroles
Secondary vents that only emit gas
How are Hotspots formed
Pacific drift moves the hotspot away from the magma point
Give 4 Benefits of volcanoes
Minerals, soils, energy and tourism
Give a location where geothermal energy is used
Iceland
What volcano in studied area heats water using geothermal energy
Hengill
What percentage of homes are heated from geothermal energy in iceland
90%
How can Humans predict volcanic explosions (3 ways)
Change in shape (bulge or Bubble), Level of heat may increase, lahars
What 5 instruments are used to monitor volcanic activity
Seismometers, tiltmeters, satellite images, infrared images, chemical sensors
What index is used to measure volcanic explosivity
Volcanic Explosivity Index (VEI) 0-8
