Sequence of rock strata found in a large area of western Europe
For other uses, see Lias.
System
Series
Stage
Age (Ma)
European lithostratigraphy
Jurassic
Lower
Hettangian
younger
Lias
Triassic
Upper
Rhaetian
201.4–208.5
Keuper
Norian
208.5–227.0
Carnian
227.0–237.0
Middle
Ladinian
237.0–242.0
Muschelkalk
Anisian
242.0–247.2
Bunter or Buntsandstein
Lower
Olenekian
247.2–251.2
Induan
251.2–251.9
Permian
Lopingian
Changhsingian
older
Zechstein
Major lithostratigraphic units of northwest Europe with the ICS's geologic timescale of the Triassic.[1]
The Lias Group or Lias is a lithostratigraphic unit (a sequence of rock strata) found in a large area of western Europe, including the British Isles, the North Sea, the Low Countries and the north of Germany. It consists of marine limestones, shales, marls and clays.
Lias is a Middle English term for hard limestone, used in this specific sense by geologists since 1833.[2] In the past, geologists used Lias not only for the sequence of rock layers, but also for the timespan during which they were formed. It was thus an alternative name for the Early Jurassic epoch of the geologic timescale. It is now more specifically known that the Lias is Rhaetian to Toarcian in age (over a period of c. 20 million years between 200 to 180 million years ago) and thus also includes a part of the Triassic. The use of the name "Lias" for a unit of time is therefore slowly disappearing.
^Ogg, James G.; Ogg, Gabi M.; Gradstein, Felix M. (2016). "Triassic". A Concise Geologic Time Scale: 2016. Elsevier. pp. 133–149. ISBN 978-0-444-63771-0.
Triassic. The use of the name "Lias" for a unit of time is therefore slowly disappearing. In southern England, the LiasGroup is often divided into Lower...
The Blue Lias is a geological formation in southern, eastern and western England and parts of South Wales, part of the LiasGroup. The Blue Lias consists...
Jurassic)-age rocks of the lower LiasGroup in December 1823. Additional fossils of Plesiosaurus were found in rocks of the LiasGroup of Dorset for many years...
Look up Lias, lias, -lias, Liassic, or liassic in Wiktionary, the free dictionary. Lias may refer to: LiasGroup, a lithostratigraphic unit in western...
difficult. If this biostratigraphical indicator is used, then technically the LiasGroup—a lithostratigraphical division—spans the Jurassic / Triassic boundary...
of the Lias whilst the Middle Jurassic is represented by the Ravenscar and Great Oolite groups together with the lower part of the Ancholme Group. The remainder...
of amplifier Lia, a feminine given name (including a list of people with the name) Lia (food), a rice-based dish in Orissa, India Lias (disambiguation)...
lower Lias. Formed during the Late Rhaetian to Pliensbachian, in what was then a shallow marine environment, the lower Lias is composed of Blue Lias, Black...
Lia Catherine Thomas (born May 1999) is an American swimmer. She was the first openly transgender athlete to win an NCAA Division I national championship...
LiasGroup. It is most prominently exposed at its type locality in cliff section between Lyme Regis and Charmouth (alongside the underlying Blue Lias)...
rocks dating from the early Jurassic Period, namely varied layers of LiasGroup strata. The uppermost of these, forming the Tor itself, are a succession...
n) from the Upper Lias of Northamptonshire. Annals and Magazine of Natural History 10:407-415 R. Tate and J. F. Blake. 1876. The Yorkshire Lias 1-475...
Lia Block (born October 1, 2006) is an American racing driver currently competing in F1 Academy for ART Grand Prix. She previously competed for Block...
the Bridport Sand Formation. The last-named unit forms a part of the LiasGroup of rocks of Toarcian age. Beneath all of these is the relatively thick...
Meakin, J.L. (2012). Engineering geology of British rocks and soils : LiasGroup (PDF). British Geological Survey. p. 25. OCLC 781266153.{{cite book}}:...
Formation is a geological formation in North Yorkshire, England. Part of the LiasGroup, it is Pliensbachian in age. The lithology consists of silty sandstones...
(2024) reidentified the proximal femur fragment (BELUM K3998) from the LiasGroup of Northern Ireland as an indeterminate dinosaur remain, not a potential...
radar: Lias Saoudi's cultural highlights". The Guardian. Retrieved 7 May 2021. Campbell, Brian (19 February 2016). "Fat White Family frontman Lias looking...
limbs suggest it might have had a cursorial lifestyle Dracoraptor 2016 LiasGroup (Early Jurassic, Hettangian) Wales May have been a shore dweller due...
Warwickshire. It gets the name ‘lias’ from the quarrymen's dialect for ‘layers’, referring to its natural state when quarried. White lias is part of the Langport...
is MB.R.1992, a large almost complete skeleton from the Upper Lias (Toarcian) LiasGroup Formations of Württemberg, Germany. There seems to be the impression...
The Lia Pootah are a Tasmanian group who claim descent from both Tasmanian Aboriginal women of several kinship groups and European men (free settlers...
Formation and below the Bridport Sand Formation. It forms part of the LiasGroup. It is found within the Wessex Basin and parts of Somerset, in England...
Global Information