* Pennsylvania: Tuscarora Sandstone, Pocono Sandstone

* Ohio: Berea Sandstone, Massillon Sandstone

* Michigan: Jacobsville Sandstone, Grand Ledge Sandstone

* Illinois: St. Peter Sandstone, Aux Sable Sandstone

* Wisconsin: Baraboo Sandstone, Jordan Sandstone

* Iowa: Oneota Sandstone, St. Peter Sandstone

* Minnesota: Hinckley Sandstone, Fond du Lac Sandstone

* Missouri: Lamotte Sandstone, Roubidoux Sandstone

* Kansas: Dakota Sandstone, Lyons Sandstone

* Colorado: Lyons Sandstone, Dakota Sandstone

* Utah: Navajo Sandstone, Kayenta Sandstone

* Arizona: Aztec Sandstone, Coconino Sandstone

* Nevada: Aztec Sandstone, Moenkopi Sandstone

* California: Chico Formation, Great Valley Sequence