| State | Arkansas |
|---|---|
| Name | St. Peter Sanstone and Everton Formation (Middle Ordovician) |
| Geologic age | Middle Ordovician |
| Lithologic constituents |
Major
Sedimentary > Carbonate > Dolostone (Bed)
Sedimentary > Clastic > Sandstone (Bed)
Incidental
Sedimentary > Carbonate > Limestone (Bed)
|
| Comments | St. Perter Sanstone-white saccharoidal sandstone (200ft.); Everton FM-mainly dolomite, limestone interbedded with sandstone and some massive sandstone beds (205 ft.). Approximatly 405 ft. maximum thickness. Summary-55% sandstone, 35% dolomite, 10% limestone. |
| References | Ferguson, J.G., 1920. Outlines of the geology, soils, and minerals of the State of Arkansas: Arkansas State Bureau of Mines, Manufactures and Agriculture,192 pp. |
| NGMDB product | |
| Counties | Baxter - Boone - Carroll - Fulton - Independence - Izard - Lawrence - Madison - Marion - Newton - Searcy - Sharp - Stone |