A. Magma exists below tEarth's crust.

Question

B. Magma can push through holes or cracks in the crust.
C. All magma intrusions result in volcanoes on Earth's surface.
D. Layer A must exist at higher temperatures than the other layers.

According to the law of superposition, we can conclude that layer A in the diagram is the oldest layer. Based on the layers and structures seen here, we can draw additional conclusions. Review the prompt and select all that could apply.

Answer 1

Based on the provided statements and the information regarding the law of superposition, we can analyze each statement in relation to the geological context:

A. True - Magma indeed exists below the Earth's crust, typically forming in the mantle where temperatures are high enough to melt rock.

B. True - Magma can push through holes or cracks in the crust, which is how volcanic eruptions occur.

C. False - Not all magma intrusions result in volcanoes on Earth's surface. Some intrusions can solidify underground and become intrusive igneous rocks without leading to volcanic activity.

D. True - According to geological principles, layer A must exist at higher temperatures than the other layers if it is the source of the magma and is positioned below them.

Based on this analysis, the statements that could apply are:

• A
• B
• D

Statement C is not true under the general conditions of magma intrusions.