Active shield volcanoes are found in:

Question

BlackTom AI · Accepted Answer

Shield volcanoes form from low-viscosity basaltic lava and produce broad, gently sloping landforms; Hawaii contains active examples such as Kīlauea and Mauna Loa.

1. Relevant knowledge points and concepts
- Shield volcano: built by fluid basaltic lava that travels long distances, creating wide, gently sloped volcanoes. 
- Tectonic setting: many shield volcanoes form over mantle plumes (hotspots) rather than at plate boundaries. 
- Active vs. inactive: "Active" means eruptions in recent historic/geologic time. Hawaii’s islands are over a hotspot, producing ongoing eruptions.

2. Step-by-step reasoning
- Identify the volcano type in question: "Active shield volcanoes."
- Match geographic regions to settings that produce shield volcanoes. Hawaii lies above a mantle plume producing repeated basaltic eruptions and several active shield volcanoes.
- Evaluate each option against these criteria.

3. Intermediate observations (no numeric calculations required)
- Hawaii: Contains Mauna Loa and Kīlauea—classic, active shield volcanoes with low viscosity basalt flows and frequent eruptions.
- Riverside County and Los Angeles: Southern California has some volcanic fields and cinder cones, but not active, large shield volcanoes. Most local volcanism is extinct or monogenetic.
- Grand Canyon region: Has lava flows and cinder cones (e.g., Uinkaret volcanic field), but not the large, persistent active shield volcanoes like those in Hawaii.

4. Why the correct answer is correct
Hawaii’s volcanism is driven by a hotspot producing extensive basaltic lava and broad shield edifices; Kīlauea and Mauna Loa are textbook active shield volcanoes, matching the question exactly.

5. Why the other options are incorrect
- Riverside County: No active shield volcanoes; regional volcanism is limited and mostly extinct.
- Los Angeles: Lacks active shield volcanoes; urban Southern California is not a hotspot location.
- the Grand Canyon: Contains older basaltic eruptions and cinder cones but not ongoing, large shield volcanoes like Hawaii.

6. Conclusion
Therefore the correct choice is Hawaii, which matches the provided answer.

Active shield volcanoes are found in:单项选择题

类似问题

An example of an active shield volcano includes:

Question at position 2 Which of the following is not an example of a shield volcano?KilaueaMt. PeleeMauna LoaMauna KeaClear my selection

The very fluid lava associated with basaltic eruptions most often produces:

A project has a required return of 12.6 percent, an initial cash outflow of $42,100, and cash inflows of $16,500 in Year 1, $11,700 in Year 2, and $10,400 in Year 4. What is the net present value?

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单