Final answer:
The depositional environment for the Chattanooga Shale is most likely a deep marine or swamp environment.
Step-by-step explanation:
The Chattanooga Shale was formed from black muds with a high organic carbon content. The depositional environment for the Chattanooga Shale is most likely a deep marine or swamp environment, indicated by the black color of the shale, which means no oxygen was present.
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