What material comprises the innermost layer of the volcano snail shell?
Answer
Aragonite
The innermost layer of the shell consists of aragonite, which is a form of calcium carbonate that creates a milky white appearance inside the shell. This layer serves as the base of the shell structure, while the outer layers provide additional protection and structural integrity. The use of aragonite is common in many mollusks, but its integration with iron sulfide layers creates a unique composite defense system.
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