Correlation of local stratigraphic sections measured along the walls of the Grand Canyon shows that the lower part of the Muav Limestone changes laterally into the

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The lower part of the Muav Limestone changes laterally into the upper part of the Bright Angel Shale. This is a common phenomenon in sedimentary geology where lateral facies changes reflect different depositional environments existing at the same time but in different locations.

Correlation of Local Stratigraphic Sections Measured Along the Walls of the Grand