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Lias Group

Index Lias Group

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. [1]

31 relations: Blue Lias, British Isles, Clay, Early Cretaceous, Early Jurassic, England, Geologic time scale, Geological formation, Germany, Greensand, Limestone, Lithostratigraphy, Low Countries, Marl, Mull, Netherlands, North Sea, Penarth Group, Posidonia Shale, Raasay, Rhaetian, Royal Netherlands Academy of Arts and Sciences, Scotland, Series (stratigraphy), Shale, Skye, Somerset, Stratum, Toarcian, Triassic, White lias.

Blue Lias

The Blue Lias is a geologic formation in southern, eastern and western England and parts of South Wales, part of the Lias Group.

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British Isles

The British Isles are a group of islands off the north-western coast of continental Europe that consist of the islands of Great Britain, Ireland, the Isle of Man and over six thousand smaller isles.

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Clay is a finely-grained natural rock or soil material that combines one or more clay minerals with possible traces of quartz (SiO2), metal oxides (Al2O3, MgO etc.) and organic matter.

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Early Cretaceous

The Early Cretaceous/Middle Cretaceous (geochronological name) or the Lower Cretaceous (chronostratigraphic name), is the earlier or lower of the two major divisions of the Cretaceous.

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Early Jurassic

The Early Jurassic epoch (in chronostratigraphy corresponding to the Lower Jurassic series) is the earliest of three epochs of the Jurassic period.

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England is a country that is part of the United Kingdom.

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Geologic time scale

The geologic time scale (GTS) is a system of chronological dating that relates geological strata (stratigraphy) to time.

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Geological formation

A formation or geological formation is the fundamental unit of lithostratigraphy.

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Germany (Deutschland), officially the Federal Republic of Germany (Bundesrepublik Deutschland), is a sovereign state in central-western Europe.

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Greensand or green sand is a sand or sandstone which has a greenish color.

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Limestone is a sedimentary rock, composed mainly of skeletal fragments of marine organisms such as coral, forams and molluscs.

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Lithostratigraphy is a sub-discipline of stratigraphy, the geological science associated with the study of strata or rock layers.

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Low Countries

The Low Countries or, in the geographic sense of the term, the Netherlands (de Lage Landen or de Nederlanden, les Pays Bas) is a coastal region in northwestern Europe, consisting especially of the Netherlands and Belgium, and the low-lying delta of the Rhine, Meuse, Scheldt, and Ems rivers where much of the land is at or below sea level.

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Marl or marlstone is a calcium carbonate or lime-rich mud or mudstone which contains variable amounts of clays and silt.

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Mull (Muile) is the second largest island of the Inner Hebrides (after Skye), off the west coast of Scotland in the council area of Argyll and Bute.

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The Netherlands (Nederland), often referred to as Holland, is a country located mostly in Western Europe with a population of seventeen million.

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North Sea

The North Sea (Mare Germanicum) is a marginal sea of the Atlantic Ocean located between Great Britain, Scandinavia, Germany, the Netherlands, Belgium, and France.

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Penarth Group

The Penarth Group is a Rhaetian age (Triassic) lithostratigraphic group (a sequence of rock strata) which is widespread in Britain.

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Posidonia Shale

The Posidonia Shale is an Early Jurassic geological formation of south-western Germany, including exceptionally well-preserved complete skeletons of fossil marine fish and reptiles.

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Raasay (Ratharsair) is an island between the Isle of Skye and the mainland of Scotland.

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The Rhaetian is, in geochronology, the latest age of the Triassic period or in chronostratigraphy the uppermost stage of the Triassic system.

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Royal Netherlands Academy of Arts and Sciences

The Royal Netherlands Academy of Arts and Sciences (Koninklijke Nederlandse Akademie van Wetenschappen, abbreviated: KNAW) is an organization dedicated to the advancement of science and literature in the Netherlands.

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Scotland (Alba) is a country that is part of the United Kingdom and covers the northern third of the island of Great Britain.

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Series (stratigraphy)

Series are subdivisions of rock layers based on the age of the rock and formally defined by international conventions of the geological timescale.

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Shale is a fine-grained, clastic sedimentary rock composed of mud that is a mix of flakes of clay minerals and tiny fragments (silt-sized particles) of other minerals, especially quartz and calcite.

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Skye, or the Isle of Skye (An t-Eilean Sgitheanach or Eilean a' Cheò), is the largest and northernmost of the major islands in the Inner Hebrides of Scotland.

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Somerset (or archaically, Somersetshire) is a county in South West England which borders Gloucestershire and Bristol to the north, Wiltshire to the east, Dorset to the south-east and Devon to the south-west.

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In geology and related fields, a stratum (plural: strata) is a layer of sedimentary rock or soil, or igneous rock that were formed at the Earth's surface, with internally consistent characteristics that distinguish it from other layers.

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The Toarcian is, in the ICS' geologic timescale, an age or stage in the Early or Lower Jurassic.

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The Triassic is a geologic period and system which spans 50.6 million years from the end of the Permian Period 251.9 million years ago (Mya), to the beginning of the Jurassic Period Mya.

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White lias

White lias is a rare, fine-grained form of limestone from the late Triassic period, occurring only in certain parts of Somerset and infrequently in Warwickshire.

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Redirects here:

Lias (group), Lower Lias, Lower Lias Group, Middle Lias, Upper Lias.


[1] https://en.wikipedia.org/wiki/Lias_Group

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