Lias Group

Geology

Formations: unnamed (30), Beacon Limstone (1), Blue Lias (64), Broadford Beds (1), Charmouth Mudstone (51), Dyrham (1), Lower Lias (33), Marlstone Rock (2), Middle Lias (3), Scunthorpe Mudstone (2), Upper Lias (11), Waterloo Mudstone (5), Whitby Mudstone (2)

Lithologies: not reported (35), "siliciclastic" (6), claystone (7), mudstone (36), "shale" (37), siltstone (1), sandstone (6), marl (41), lime mudstone (29), wackestone (1), "limestone" (42), dolomite (2), siderite (1)

Paleoenvironments: marine indet. (111), terrestrial indet. (2), carbonate indet. (33), peritidal (2), shallow subtidal indet. (5), deep subtidal shelf (6), offshore ramp (13), offshore indet. (8), marginal marine indet. (14), offshore (12)

Age range: base of the Early/Lower Jurassic to the top of the Late/Upper Toarcian or 201.40000 to 175.60000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Rhaetian208.5 - 201.3United Kingdom (England) (115220 115222 117340 136912)
Rhaetian - Hettangian208.5 - 199.3United Kingdom (England) (99398)
Rhaetian - Sinemurian208.5 - 190.8United Kingdom (England) (25838)
Early/Lower Jurassic201.4 - 174.7United Kingdom (England) (84119 84120 84121 84122 84123 84124 84125 139784 206280)
Early/Lower Jurassic201.4 - 174.7United Kingdom (Somerset) (198904)
Hettangian201.3 - 199.3United Kingdom (Wales) (176060)
Hettangian201.3 - 199.3United Kingdom (Gloucestershire) (204158 204159 204160 204161)
Hettangian201.3 - 199.3United Kingdom (England) (91706 105080 142744 149321 153782 153783 200925)
Hettangian201.3 - 199.3United Kingdom (Northern Ireland) (103080 103081 139588 232210)
Early/Lower Hettangian201.3 - 196.5United Kingdom (England) (97844 110213 119083 119284 163292 163299)
Late/Upper Hettangian201.3 - 196.5France (Languedoc-Roussillon) (140449 140450)
Late/Upper Hettangian201.3 - 196.5United Kingdom (Wales) (29234)
Late/Upper Hettangian201.3 - 196.5United Kingdom (England) (29233 37812 118315 163293 163294 163295 163297)
Liasicus201.3 - 196.5United Kingdom (England) (78503 78504)
Middle Hettangian201.3 - 196.5United Kingdom (England) (29231 29232)
Planorbis201.3 - 196.5United Kingdom (England) (78491 78492 78494 78495 78496 78497 78498 78499 78500 78501 78502 115460 115518 195941 195946 196362 196364)
Hettangian - Sinemurian201.3 - 190.8United Kingdom (England) (41623 41624 41625 41626 131891 142415 176124)
Hettangian - Early/Lower Sinemurian201.3 - 189.6United Kingdom (England) (87878 92620 195942)
Hettangian - Early/Lower Sinemurian201.3 - 189.6United Kingdom (Gloucestershire) (204157)
Early/Lower Hettangian - Early/Lower Pliensbachian201.3 - 183.0United Kingdom (England) (118938)
Hettangian - Early/Lower Pliensbachian201.3 - 183.0United Kingdom (England) (119084 119085 140697 140698)
Hettangian - Pliensbachian201.3 - 182.7United Kingdom (Northern Ireland) (103079)
Early/Lower Hettangian - Middle Jurassic201.3 - 161.5United Kingdom (England) (29229)
Sinemurian199.3 - 190.8United Kingdom (Scotland) (32316)
Sinemurian199.3 - 190.8United Kingdom (England) (52260 52262 84559 96467 97907 98103 122159 138246 139856 192973 206281 223809 223810 223811 223812 223813)
Sinemurian199.3 - 190.8United Kingdom (Gloucestershire) (204146 204147 204148 204149 204150 204151 204152)
Sinemurian - Early/Lower Pliensbachian199.3 - 183.0United Kingdom (England) (235617)
Bucklandi196.5 - 189.6United Kingdom (England) (147352 195944)
Early/Lower Sinemurian196.5 - 189.6United Kingdom (England) (29235 29237 29239 29241 59028 71400 71401 106464 136920 140334 176439 227266)
Early/Lower Sinemurian196.5 - 189.6United Kingdom (Gloucestershire) (204153 204154 204155 204156)
Early/Lower Sinemurian196.5 - 189.6United Kingdom (Wales) (29236 29238 29240 29242)
Late/Upper Sinemurian196.5 - 189.6United Kingdom (England) (52749 114646 118478 118882 123395 204165 210061 227267 235615)
Late/Upper Sinemurian196.5 - 189.6United Kingdom (Gloucestershire) (204130 204131 204132 204133)
Obtusum196.5 - 189.6United Kingdom (England) (44621 44624 114637 114639 114640 189411 114683 189404 192972 205727)
Obtusum196.5 - 189.6United Kingdom (Dorset) (170337 189405)
Semicostatum196.5 - 189.6United Kingdom (England) (234340)
Turneri196.5 - 189.6United Kingdom (Dorset) (187763 189409 189410)
Turneri196.5 - 189.6United Kingdom (England) (123282)
Late/Upper Sinemurian - Early/Lower Pliensbachian196.5 - 183.0United Kingdom (235621)
Pliensbachian190.8 - 182.7United Kingdom (England) (92695)
Pliensbachian190.8 - 182.7United Kingdom (Gloucestershire) (204121 204122 204123 204124 204125 204126)
Pliensbachian - Toarcian190.8 - 174.1United Kingdom (England) (142108)
Early/Lower Pliensbachian189.6 - 183.0United Kingdom (England) (59029 59031 90428 92715 138247 139701 176440)
Early/Lower Pliensbachian189.6 - 183.0United Kingdom (Gloucestershire) (204127 204128 204129)
Ibex189.6 - 183.0United Kingdom (Dorset) (159141 159143 159144)
Jamesoni189.6 - 183.0United Kingdom (England) (123530)
Late/Upper Pliensbachian189.6 - 183.0United Kingdom (Gloucestershire) (204119 204120)
Late/Upper Pliensbachian189.6 - 183.0United Kingdom (England) (59030 206283)
Early/Lower Toarcian183.0 - 182.0United Kingdom (Gloucestershire) (204115 204116 204117 204118)
Falciferum183.0 - 182.0United Kingdom (England) (102189 132646)
Toarcian182.7 - 174.1United Kingdom (England) (52543 102274 142107)
Middle Toarcian182.0 - 175.6United Kingdom (Gloucestershire) (204110 204111 204112 204113 204114)
Late/Upper Toarcian180.1 - 175.6United Kingdom (Gloucestershire) (204109)
Late/Upper Toarcian180.1 - 175.6United Kingdom (England) (206282)