Also found in: Encyclopedia, Wikipedia.


n.1.(Geol.) A term applied to the lowest deposits of the Cretaceous or chalk formation of Europe, being the lower greensand.
a.1.(Geol.) Of or pertaining to the lower greensand.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
The Alam El Bueib Formation is subdivided into several members, including (1) the Matruh Member (Neocomian, lower Aptian) which is composed of shales and sandstones, (2) the Umbarka Member (Barremian) which consists mainly of sandstone and shale with few streaks of limestone, and (3) the Mamura Carbonate Member which is mainly composed of limestone [17].
Tullow has matured a drill ready Neocomian carbonate prospect in water depth of approximately 100m.
The Shurijeh formation belongs to the Neocomian and was formed as a result of sea retreatment (Afshar-Harb, 1979).
The type species of Agathodonta, by original designation, is Trochus dentiger d'Orbigny, 1843 (an unjustified emendation of Trochus dentigerus d'Orbigny, 1843) from the Lower Cretaceous (Neocomian) of north-eastern France, which has recently been shown to be a junior synonym of Littorina elegans Deshayes in Leymerie, 1842 (Kollmann 2005).
Its age is Neocomian, Hith or Surmeh Formations are its lower boundary and is overlaid by Gadvan or Dariyan Formations [15].
Nyuni-2 was spudded on 17 June 2011 using the Caroil Rig-6, to target Lower Cretaceous age Neocomian (earliest Lower Cretaceous) sandstones, similar to those found in Bounty's nearby Kiliwani North gas field and in the producing Songo-Songo gas field.
Given these observations, and although no direct determination of its age is available, the development of the mylonitic foliation and the metamorphism of the rhyolites probably took place during the thrusting of the Sarmiento ophiolite and the Tobifera Formation to the east during a late Neocomian compressional event (Dalziel, 1986; Fildani et al., 2005).
ZEF's operating interests cover 24,300 acres and a 100% working interests in the Neocomian Complex and Charmottes fields in the Paris Basin.