lias

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Related to Liassic: Lower Jurassic

lias

the early JURASSIC characterized by estuarine and marine deposits typified by ammonites, insects, saurians and cycads.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
(1993) Geometrical simulation studies of coastal cliff failures in Liassic strata, south Wales, U.K.
The geological characteristics of these oil-rich, naturally fractured, thermally mature formations compare favorably to fractured shale formations such as the Bakken Shale in the Williston Basin and Liassic Shale in the Paris Basin.
(1986): Revision of the stratigraphy of the Longobucco Group (Liassic, southern Italy); based on new data from nannofossils and ammonites.
(1984): The Liassic brachiopods of the Iberian Range (Spain): Stratigraphie distribution and biozonation.
These licences contain a material existing gas discovery in the Lower Liassic where two wells have already been drilled and a near term well test is awaited prior to possible commercial production.
(1997): Entolium beds: Hiatal shell concentrations in starved pelagic settings (Middle Liassic, SE Spain).