Question 41-42 For questions 29 through 42 please refer to Figure 5 Questions 29

Question

Question 41-42

For questions 29 through 42 please refer to Figure 5 Questions 29 through 42: Matching: Match each statement to the volcanic construct that best fits. Note shape and size will help you here. 29. 30. 31. 32. 33. Maar. Cinder cone Composite cone (aka: stratovolcano) Shield Volcano. Lava Plateau. A. Volcano x B. Volcano y C. Volcano z D. None of the constructs matches the statement. Typical of a subduction zone setting. Entirely composed of Silicic (Felsic) Lava (Rhyolitic Lava) Of the three constructs shown on Figure 5, the one formed from lava with the greatest silicon to oxygen ratio. (hint: it cannot be "D") Hot Spot note: pick only the construct more likely formed at a hot spot. Flood Basalt note: as opposed to simple basalt flows. Explosive eruptions Basalt flows. Pyroclastic (tephra) only. Alternating layers of pyroclastic flows and lava. 34. 35. 36. 37. 38. 39. 40. 41. 42. For questions 43 through 45 please refer to the magnetic lineations of the seafloor across mid-ocean

Explanation / Answer

41) Volcano z (Airborne fragments of lava, called tephra, are ejected from a single vent. The lava cools rapidly and builds up around the vent, forming a crater at the summit.

42) Volcano x (A composite volcano (cone-shaped volcano formed by alternating layers of solidified lava and rock particles) is a combination of a cinder cone and shield volcano that results from alternating eruptions of volcanic debris and lava)

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