Helderberg Formation, Group

Geology

Formations: unnamed (1), Coeymans (22), Kalkberg (5), Keyser (1), Manlius (5), New Scotland (1)

Members: unnamed (1)

Lithologies: "shale" (5), sandstone (1), marl (2), lime mudstone (4), packstone (1), grainstone (5), "reef rocks" (12), "limestone" (13)

Paleoenvironments: marine indet. (2), carbonate indet. (8), peritidal (1), shallow subtidal indet. (11), open shallow subtidal (1), lagoonal/restricted shallow subtidal (1), reef, buildup or bioherm (12)

Age range: Lochkovian or 419.20000 to 410.80000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Lochkovian419.2 - 410.8USA (New York) (76269 26851 75184 76242 76250 76270 76271 76272 76273 76274 76275 76276 76277 76278 76279 76280 76281 76330 76756 76757 76846 76847 76848 76849 76850 76851 83108 83109 83110 83111 83112 83113 83114 83115)
Lochkovian419.2 - 410.8USA (Maryland) (219867)
Early/Lower Devonian419.2 - 393.3USA (Pennsylvania) (28768)