A. fissure
B. shield
C. rift
D. composite cone
11 answers
D. composite cone
Composite cones, also known as stratovolcanoes, are typically found along convergent boundaries where an oceanic plate subducts beneath a continental plate or another oceanic plate. These volcanoes are characterized by their steep profiles and are often associated with explosive eruptions.
B. continental-continental convergent boundary
In the case of a continental-continental convergent boundary, mountain ranges can form as tectonic plates collide and fold, resulting in significant earthquake activity. Since continental plates do not typically subduct like oceanic plates, trenches are not found offshore in this scenario.
To determine the distance to the epicenter using the provided equation \( \text{S-P interval} = 0.001613 \times \text{distance to epicenter} \), we can rearrange the equation to solve for the distance:
\[ \text{distance to epicenter} = \frac{\text{S-P interval}}{0.001613} \]
Given that the S-P interval is 8 minutes, we need to convert this into seconds:
\[ 8 \text{ minutes} = 8 \times 60 = 480 \text{ seconds} \]
Now, substituting the value of the S-P interval into the equation:
\[ \text{distance to epicenter} = \frac{480}{0.001613} \approx 297,500 \text{ km} \]
This result indicates that either there has been a misunderstanding about the value of the S-P interval in terms of scaling, or the equation needs different parameters for realistic values.
However, based on the provided answers:
A. less than 1 km
B. 8 km
C. 500 km
D. 5,000 km
The closest approximate answer to a massive result would realistically be C. 500 km if rounding was involved or for more common distance ranges, unless the scaling in the initial equation is misinterpreted.
D. continental-continental convergence
The gold of the Inca civilization primarily came from mountainous regions formed by the processes associated with continental-continental convergence. The Andes Mountains, which run along the western coast of South America, were formed by the collision of the Nazca and South American tectonic plates, creating the geological conditions that allowed for the formation of gold and other mineral deposits.
Based on your description of the illustration, it sounds like it depicts a geological formation associated with a hot spot. The presence of a large tube (likely a magma conduit) that funnels into an underground area colored bright orange and yellow suggests that there is magma or molten rock being stored or moving toward the surface.
The yellow intensity particularly beneath the land formation indicates a zone of high heat or molten rock, which is characteristic of hot spots where magma can rise towards the surface, often forming volcanic activity away from tectonic plate boundaries.
Therefore, the correct answer would be:
D. hot spot
Based on your description of the illustration, it appears to depict a volcanic mountain formation. The presence of smoke coming from the top of the formation suggests that it is erupting or has volcanic activity, while the tube leading to an underground oval area filled with colors like orange and yellow indicates a magma chamber. The smaller tubes branching off the larger one likely represent additional pathways for magma to rise through.
None of the boundary types listed (A, B, C, or D) inherently produces volcanic activity in the way described. However, volcanic activity is most commonly associated with:
Since you described smoke and a volcanic structure, if I had to choose one, D. divergent boundary is the closest match, as it often features volcanic activity associated with magma coming from below Earth's crust.
However, if the mountain formation results from a subduction zone (common at convergent boundaries), then option B could also be relevant (but not if it clearly states divergent). Given your context, D would be the safer choice based on typical patterns of volcanic activity.
