Helsby Sandstone Formation

Geology

Group: Sherwood Sandstone

Members: unnamed (2), Pennington Point (1), Wood Mine Conglomerate (1)

Lithologies: mudstone (1), sandstone (3), conglomerate (1)

Paleoenvironments: terrestrial indet. (3), fluvial-lacustrine indet. (1)

Age range: base of the Early/Lower Triassic to the top of the Anisian or 251.90200 to 241.46400 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Early/Lower Triassic251.902 - 246.7United Kingdom (England) (197338)
Early/Lower Triassic - Middle Triassic251.902 - 237.0United Kingdom (England) (197340)
Anisian246.7 - 241.464United Kingdom (England) (197296 214637)