Beacon Group

Geology

Formations: unnamed (5), Buckley (1), Fremouw (10), Takrouna (1)

Lithologies: not reported (8), claystone (5), mudstone (4), "shale" (1), siltstone (1), sandstone (3), marl (11), lime mudstone (1), chalk (4), wackestone (1), grainstone (4), "limestone" (16), chert (1), peat (1)

Paleoenvironments: marine indet. (22), terrestrial indet. (4), carbonate indet. (9), shallow subtidal indet. (1), fluvial indet. (4), "channel" (1), "floodplain" (2)

Age range: base of the Chazyan to the top of the Early/Lower Maastrichtian or 470.00000 to 66.00000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Chazyan470.0 - 457.3Canada (Quebec) (310)
Sakmarian - Artinskian293.52 - 279.3Antarctica (29351 29356)
Artinskian290.1 - 279.3Antarctica (29354 29355 29357 29367)
Guadalupian273.01 - 259.51Antarctica (29352)
Capitanian - Changhsingian264.28 - 252.17Antarctica (Queen Alexandra) (21171)
Early/Lower Triassic252.17 - 247.2Antarctica (27265 27266 87410 87414 87420 99431 105602 136395 220333 227009)
Margaritatus189.6 - 183.0United Kingdom (118051 118052)
Early/Lower Toarcian183.0 - 182.0United Kingdom (175846 175847)
Early/Lower Toarcian183.0 - 182.0United Kingdom (Somerset) (159505 195989)
Falciferum183.0 - 182.0United Kingdom (England) (132646)
Falciferum183.0 - 182.0United Kingdom (Somerset) (33338 33339 33340 33341 33342 33343 33344)
Toarcian182.7 - 174.1United Kingdom (118020 118053)
Toarcian182.7 - 174.1United Kingdom (Oxfordshire) (195988)
Bifrons182.0 - 175.6United Kingdom (Somerset) (33345 33346 33347 33348 196237 196238)
Thouarsense180.1 - 175.6United Kingdom (Somerset) (33349 33350 33351 33352)
Early/Lower Maastrichtian70.6 - 66.0United Kingdom (157714 157731 157732 157733)