5. Which of the following volcanoes is most likely to contain pillow lava? a. do

Question

5. Which of the following volcanoes is most likely to contain pillow lava? a. dome b. cinder cone c. stratovolcano d. mid-oceanic rifts 36. Find the correct volcano/volcanic product match. a. dome/basalt b. shield volcano/rhyolite c. fissure/basalt d. shield volcano/andesite 37. Find the correct match between magma type and volcano type. a. felsic/dome b. mafic/dome c. intermediate/shield volcano d. felsic/cinder cone 38. Which of the following volcanic features or textures suggest that significant amounts of water were present during an eruption? a. vesicles b. phenocrysts c. lava ropes d. pillows 39. In the Atlantic Ocean region, where are most of the active volcanoes located? a. along the coastlines of the Americas b. on the continental shelves c. along the Mid-Atlantic Ridge d. distributed randomly along the seafloor

Explanation / Answer

35. The Volcano most likely contain Pillow lavas is

d.midoceanic rift

Pillow lavas occur at midoceanic ridges .As new ocenic crust formed as thick sequence of pillow lavas are erupted at the spreading center fed by dykes from the underlying magma chamber. so pillow lavas are common in midoceanic rift.

36.The coorect match of volcano/ volcanic product is

c. fissure/basalt

The volcanic fissure is a linear volcanic vent through which lava erupt, without any explosive activity. Fissure vents can cause large flood basalts which run first in lava channels and later in lava tubes.

37. The correct match between magma type and volcano type is ome

a.felsic/dome

The lava dome is a roughly circular mound shapred protrusion resulting from the slow extrusion of viscous lava from a volcano. So lava domes are formed by viscous magma that prevents flowing very far. High viscosity and low temperatures are characteristics of felsic composition.

38. The volcanic feature or texture suggest that significant amount of water were present during the eruption is

d.pillows

pillow shaped dtructures attributed to the extrution of lava under water.

39.In Atlantic region , the most active volcanoes located is

c. along the Mid-Atlantic Ridge

Mid Atlantic Ridge is the site of volcanic activity and earthquakes.

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