Page 1 Igneous Activity
Review
Page 2 Igneous Activity click for Final ?
Magma/Lava Pyroclastics Volcano Characteristics
Infamous Volcanoes
Viscosity
200 200 200 200 200
400 400 400 400 400
600 600 600 600 600
800 800 800 800 800
1000 1000 1000 1000 1000
Page 3 Magma/Lava for 200
• What % of lava is gaseous?
Page 4 Magma/Lava 200
• 1 to 5 % by weight is gaseous.
Page 5 Magma/Lava 400
• Gases most often emitted by volcanoes.
Page 6 Magma/Lava 400
• Water vapor and carbon dioxide.
Page 7 Magma/Lava 600
• Lava with spiny, sharp projections.
Page 8 Magma/Lava 600
• aa– Spiny with sharp edges– slightly more viscous
Page 9 Magma Lava 800
• Describe pahoehoe.
Page 10 Magma/Lava 800
• Not viscous
• Low in silica
• Very hot
• Smooth, ropy texture
Page 11 Magma/Lava 1000
• What is the neck of a volcano?
Page 12 Magma/Lava 1000
• The resistant rock exposed after the rest has been eroded away.– Ship Rock, New Mexico
Page 13 Pyroclactics 200
• What is the smallest pyroclastic?
Page 14 Pyroclastics 200
• Ash
Page 15 Pyroclastics 400
• Describe nue’e ardente.
Page 16 Pyroclastics 400
• Firey gas and ash moving down the mountain at 200 km/hr.
Page 17 Pyroclastics 600
• Describe lahar.
Page 18 Pyroclastics 600
• River of mud and ash from the top of a stratovolcano.
Page 19 Pyroclastics 800
• What becomes “air streamed” after ejection?
Page 20 Pyroclastics 800
• Lava bombs.
Page 21 Pyroclastics 1000
• Pyroclastics about the size of walnuts are called _____.
Page 22 Pyroclastics 1000
• Lapilli
Page 23 Volcano Characteristics 200
• Volcano type typically has a quiet eruption.
Page 24 Volcano Characteristics 200
• Shield volcano
Page 25 Volcano Characteristics 400
• Volcano type has a violent eruption.
Page 26 Volcano Characteristics 400
• Stratovolcano or Cone
Page 27 Volcano Characteristics 600
• Typically the highest volcanoes from sea level.
Page 28 Volcano Characteristics 600
• stratovolcanoes
Page 29 Volcano Characteristics 800
• Smallest volcano type.
Page 30 Volcano Characteristics 800
• Cone
Page 31 Volcano Characteristics 1000
• Describe caldera.
Page 32 Volcano Characteristics 1000
• Volcanic crater at least 1 km wide.– Yellowstone National Park
Page 33 Infamous Volcanoes 200
• Which well known volcano is in Hawaii?
Page 34 Infamous Volcanoes 200
• Mauna Loa
• Kilauea
Page 35 Infamous Volcanoes 400
• Which large caldera is in the middle of N.A?
Page 36 Infamous Volcanoes 400
• Yellowstone National Park
Page 37 Infamous Volcanoes 600
• Why is Mt. St, Helens well known?
Page 38 Infamous Volcanoes 600
• Erupted in 1980
• Lost most of its top
• Large lahar
• Was the last catastrophic eruption in the continental U.S.
Page 39 Infamous Volcanoes 800
• Which volcano is currently erupting in Alaska?
Page 40 Infamous Volcanoes 800
• Mt. Redoubt (2009)
Page 41 Infamous Volcanoes 1000
• Why is Vesuvius well known?
Page 42 Infamous Volcanoes 1000
• Large nue’e ardente
• Covered city of Pompeii
• People and animals perserved in ash
Page 43 Viscosity 200
• Magma higher in silica is ____ viscous.
Page 44 Viscosity 200
• more
Page 45 Viscosity 400
• Describe the viscosity of basaltic lava.
Page 46 Viscosity 400
• Not Very viscous
Page 47 Viscosity 600
• Describe the viscosity of granitic lava.
Page 48 Viscosity 600
• Very viscous - high in silicates
Page 49 Viscosity 800
• The higher the temp. the ____ viscous.
Page 50 Viscosity 800
• less
Page 51 Viscosity 1000
• Describe viscosity.
Page 52 Viscosity 1000
• A measure of a material’s resistance to flow.
• More viscous, more slow
Page 53 Final Question
• Where are most of the world’s volcanoes located?
Page 54 Final Question
• Ring of Fire
• Around the Pacific Ocean