You may tap on the above image for information regarding the individual layers

 
The following mnemonic sentence provides an easy way to remember the primary rock layers in the Grand Canyon:

 

Know	Kaibab Limestone
The	Toroweap Formation
Canyon's	Coconino Sandstone
History,	Hermit Shale
Study	Supai Formation
Rocks	Redwall Limestone
Made	Muav Limestone
By	Bright Angel Shale
Time	Tapeats Sandstone

The only primary layer that is missing here is the Vishnu Schist which you will simply have to remember to add.

 
Paleozoic Strata

• Kaibab Limestone
• Toroweap Formation
• Coconino Sandstone
• Hermit Shale
• Supai Formation
• Redwall Limestone
• Temple Butte Limestone
• Tonto Group

  These layers average about 515 to 545 million years old and consist of the following:

  • Muav Limestone
  • Bright Angel Shale
  • Tapeats Sandstone

This non-layer indicates an age in which no sediments can be found. It is indicative of a time when an advancing sea eroded away the sediments that should be here.

Late Pre-Cambrian Rocks

• Chuar Group
• Nankoweap Formation
• Unkar Group

This non-layer represents a time where the mountains that had grown here were gradually eroded away to form a plain.

Early Pre-Cambrian Rocks

• Vishnu Schist and Zoroaster Granite

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