Ferruginous sandstone with detritial framework grains.

The stone marker, a ferruginous sandstone block about two feet high and eight inches (203 mm) thick, is near the west bank of the Mobile River.

The aquifer is largely composed of hard ferruginous sandstone with great shale and clay intercalation, having a thickness that ranges between 140-230 meters.

The same ammonites were found in a bed of ferruginous sandstone (Red Bed) towards the top of the anglicus sands.

Boulder matrix opal - an anastomosing network of precious opal veins within ferruginous sandstone or ironstone.

Here it consists of unfossiliferous sands (white, yellow, brown, crimson and every intermediate shade) and clays with layers of lignite and ferruginous sandstone.

Matrix opal - Matrix opal is where the opal occurs as a network of veins or infilling of voids or between grains of the host rock (ferruginous sandstone or ironstone).

The mycelium agglutinated grains of the sandy soil to form a stone-like basal portion resembles a concretion of ferruginous sandstone in appearance and almost in density (the whole fungus in the figure weighed as heavy as 13.25 ounces).

At this location, it consists of a thin layer of highly ferruginous sandstone that is composed of sediments derived from the underlying Cardenas Basalt and a 10 m thick ferruginous weathered zone (paleosol) developed in the eroded surface of the Cardenas Basalt.

Representative samples of lithics from West Virginia are Kanawha Black Flint, Hillsdale/Greenbrier, Helderberg, Hughes River among Flint Ridge, Carter Cave, Paoli, Knox, rhyolite, and ferruginous sandstone that were brought in from surrounding states (CWVA).