VOLCANOES PLUTONS AND IGNEOUS
ROCKS EXAM SCRIPT VERIFIED QUESTIONS
WITH ACCURATE ANSWERS
●● Which element is found in lesser amounts in low viscosity magma,
than in high viscosity magma?
Answer: Si
●● Find the correct characteristic and location for development of a lava
called "pahoehoe"
Answer: a low gas, mafic lava forming on a Shield Volcano as seen in
Hawaii
●● How is a fissure different from a vent?
Answer: Fissures are long cracks in the surface
●● Which is NOT a factor that determines which type of igneous
landform will be formed?
Answer: Bedrock type
●● What characteristics / features of the magma and the "plumbing"
system are required to exist for the development of a landform called a
"lava plateau"
, Answer: high viscosity + felsic magma + low gas + fissure eruption
forming a rock called porphyritic andesite
●● Which texture indicates that the lava/magma had a high gas content?
Answer: Vesicular
●● Which type of lava flow has the slowest moving flow front?
Answer: Aa ?
●● What is "Aa" (besides being the first word in the geological
dictionary)?
Answer: a basalt lava flow where the lava develops a sharp jagged
surface called "clinker"
●● Name a rock and landform characteristics that occur at a divergent
oceanic plate margin
Answer: pillow lavas of basaltic composition occur along fissure
eruptions on the ocean floor
●● Select the material with the lowest viscosity (on this list).
Answer: air
●● Which type of volcanic landform is the Columbia River Plateau?
ROCKS EXAM SCRIPT VERIFIED QUESTIONS
WITH ACCURATE ANSWERS
●● Which element is found in lesser amounts in low viscosity magma,
than in high viscosity magma?
Answer: Si
●● Find the correct characteristic and location for development of a lava
called "pahoehoe"
Answer: a low gas, mafic lava forming on a Shield Volcano as seen in
Hawaii
●● How is a fissure different from a vent?
Answer: Fissures are long cracks in the surface
●● Which is NOT a factor that determines which type of igneous
landform will be formed?
Answer: Bedrock type
●● What characteristics / features of the magma and the "plumbing"
system are required to exist for the development of a landform called a
"lava plateau"
, Answer: high viscosity + felsic magma + low gas + fissure eruption
forming a rock called porphyritic andesite
●● Which texture indicates that the lava/magma had a high gas content?
Answer: Vesicular
●● Which type of lava flow has the slowest moving flow front?
Answer: Aa ?
●● What is "Aa" (besides being the first word in the geological
dictionary)?
Answer: a basalt lava flow where the lava develops a sharp jagged
surface called "clinker"
●● Name a rock and landform characteristics that occur at a divergent
oceanic plate margin
Answer: pillow lavas of basaltic composition occur along fissure
eruptions on the ocean floor
●● Select the material with the lowest viscosity (on this list).
Answer: air
●● Which type of volcanic landform is the Columbia River Plateau?
