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Type of rock is obsidian and the environment is volcanic lava. And it was the first layer of my new planet's core.
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Type of rock is limestone and the environment is the ocean. And it is the most recent layer of the core.
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Type of rock is sandstone and the environment is a beach. And it is the most recent layer of the core.
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Type of rock is marble and the environment is the ocean. And this layer is not horizontal.
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Type of rock is limestone and the environment is the ocean. And it is the most recent layer of the core.
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Type of rock is shale and the environment is a swamp. And the width of the layer will tell you how big or small the damage was to make that layer.
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Type of rock is sandstone and the environment is a beach. And it is the most recent layer of the core.