Fossilized parts of trilobites, such as head and tail coverings shed during growth, are common fossils in many geological deposits from ancient seas.Keeping in mind that soft body parts are rarely fossilized, what does this indicate about trilobites?

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The fact that fossilized parts of trilobites are commonly found suggests that their exoskeleton was rigid and hardened, which allowed for better preservation as it was less likely to decay or decompose.

Fossilized Parts of Trilobites, Such as Head and Tail Coverings