- 1. Volcán de Ollagüe, also known as Ollagüe or Uturuncu, is a stratovolcano located in the Andes mountain range. It lies on the border between Bolivia and Chile. What is the approximate elevation of Volcán de Ollagüe?
A) 3,900 meters (12,795 feet)
B) 6,200 meters (20,341 feet)
C) 4,500 meters (14,764 feet)
D) 5,868 meters (19,252 feet)
- 2. Volcán de Ollagüe is part of the Andean Volcanic Belt. Which geological province does it belong to?
A) Southern Volcanic Zone
B) Northern Volcanic Zone
C) Central Volcanic Zone
D) Puna Volcanic Region
- 3. Ollagüe is a relatively active volcano. What is the primary type of volcanic activity observed at Ollagüe?
A) Caldera formation
B) Fumarolic activity
C) Explosive eruptions
D) Lava flows
- 4. The summit of Volcán de Ollagüe is characterized by several vents. Which of the following is NOT typically associated with its summit features?
A) Active fumaroles
B) Solfataras
C) Steam plumes
D) A large, well-defined crater lake
- 5. The volcanic activity at Ollagüe is influenced by its location on tectonic plate boundaries. Which tectonic plates are involved in the subduction zone responsible for the volcanism?
A) Nazca Plate and South American Plate
B) Antarctic Plate and South American Plate
C) Cocos Plate and North American Plate
D) Pacific Plate and Indo-Australian Plate
- 6. What is the geological composition of Volcán de Ollagüe, meaning the primary type of rock it is made of?
A) Basalt
B) Granite
C) Rhyolite
D) Andesite and dacite
- 7. The surrounding landscape of Volcán de Ollagüe is arid and high-altitude. What type of environment is characteristic of the region?
A) Altiplano (high plateau)
B) Coastal desert
C) Tropical rainforest
D) Savanna
- 8. Volcán de Ollagüe is known for its significant fumarolic activity, releasing gases. What is a common gas emitted from these fumaroles?
A) Nitrogen
B) Carbon monoxide
C) Sulfur dioxide
D) Methane
- 9. What is the typical color associated with the sulfur deposits around the fumaroles of Volcán de Ollagüe?
A) Yellow
B) Blue
C) Red
D) Green
- 10. While primarily known for fumarolic activity, has Volcán de Ollagüe had historical eruptions with lava flows?
A) Yes, but only in prehistoric times
B) Yes, but infrequent
C) No, it has always been only fumarolic
D) Yes, it erupts lava frequently
- 11. What is the geological term for a vent in the Earth's surface from which volcanic gases and steam are released?
A) Crater
B) Fumarole
C) Caldera
D) Maw
- 12. The summit of Ollagüe is often covered in snow and ice due to its high elevation. What is a consequence of this ice cover in relation to volcanic activity?
A) Prevents all volcanic activity
B) Causes slow-moving lava flows
C) Potential for steam explosions (phreatic eruptions)
D) Cooling the magma significantly
- 13. Volcán de Ollagüe is part of a chain of volcanoes in the Andes. What is the general term for such a chain of volcanoes formed by subduction?
A) Plateau
B) Volcanic arc
C) Mountain range
D) Rift valley
- 14. The region around Ollagüe is sparsely populated due to the harsh environment. What is a common characteristic of the vegetation in this high-altitude zone?
A) Dense forests
B) Sparse grasses and shrubs
C) Large agricultural fields
D) Tropical plants
- 15. What is the predominant weather condition experienced at the summit of Volcán de Ollagüe?
A) Temperate and sunny
B) Cold and windy
C) Hot and humid
D) Mild and rainy
- 16. The indigenous name for Volcán de Ollagüe might have a specific meaning. While direct translations are debated, what is a common theme associated with indigenous names for volcanoes?
A) Spiritual or powerful beings
B) Terms for edible plants
C) Geological formations
D) Names of local rivers
- 17. What is a common challenge for climbers attempting to summit Volcán de Ollagüe?
A) Navigating through a maze of lava tubes
B) Extreme heat
C) Dense jungle
D) High altitude and thin air
- 18. Volcán de Ollagüe is located in a geologically active region. What other significant geological feature is common in the Andes mountain range besides volcanoes?
A) Earthquake zones
B) Geysers
C) Hot springs (less common than earthquakes)
D) Volcanic craters filled with lava
- 19. The minerals deposited around the fumaroles of Ollagüe can be of interest. What is a common mineral found in such deposits?
A) Sulfur
B) Iron ore
C) Copper
D) Gold
- 20. Which country's national park system encompasses part of Volcán de Ollagüe?
A) Bolivia (Sajama National Park is nearby)
B) Chile
C) Argentina
D) Peru
- 21. What does the term 'stratovolcano' refer to?
A) A volcano with a large, collapsed caldera
B) A volcano that erupts only gases
C) A volcano composed of layers of lava and ash
D) A volcano with a wide, flat base
- 22. The presence of active fumaroles indicates what about the magma beneath Volcán de Ollagüe?
A) It is very viscous and unable to move
B) It is still hot and degassing
C) It has completely solidified
D) It is rapidly cooling and will soon become extinct
- 23. What type of monitoring is often conducted on active volcanoes like Ollagüe to detect potential hazards?
A) Plant growth measurement
B) Animal behavior observation
C) Weather pattern tracking
D) Seismic monitoring and gas analysis
- 24. The landscape around Volcán de Ollagüe is shaped by both volcanic processes and natural erosion. What type of erosion is prevalent in such an arid, high-altitude environment?
A) Coastal erosion
B) Wind erosion
C) Water erosion (limited due to aridity)
D) Glacial erosion
- 25. What is the primary reason for the high elevation of volcanoes in the Andes, including Ollagüe?
A) Erosion by ancient glaciers carving out valleys
B) Accumulation of solidified lava over millennia
C) The presence of a supervolcano beneath the region
D) The uplift of the Earth's crust due to tectonic plate collision
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