This layer is unique for it bridges the exocaldera and intracaldera sequences. A layer of saprolite (chemically weathered rock) separates the Bailey Rock Rhyolite formation from the overlying Caldera-Fill Sequence-era rocks.
This layer serves to connect the exocaldera and intracaldera sequences. A layer of chemically altered rock (saprolite) exists between the Bailey Rock Rhyolite formation and the subsequent rocks from the Caldera-Fill Sequence era.