Aptian


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Aptian

[′ap·tē·ən]
(geology)
Lower Cretaceous geologic time, between Barremian and Albian. Also known as Vectian.
References in periodicals archive ?
The formation is dated as Barremian-Campanian in Kach-Ziarat area, Santonian to late Campanian in the southern Kirthar Belt and the most recent studies of Khan (2012) has assigned Aptian to Early Maastrichtian age for the Mughal Kot section.
The main taxonomically identified material from Lower Cretaceous beds includes several specimens found in layers of the Hauterivian of western Russia (Fischer et al., 2015; Fischer et al., 2017), of the Barremian and Aptian of Colombia (Hampe, 1992; 2005; Paramo-Fonseca et al., 2016; Gomez-Perez and Noe, 2017); and of the Aptian and Albian of Australia (Longman, 1924; Kear, 2003).
Organic geochemistry, stable isotopes, and facies analysis of the Early Aptian OAE-New records from Spain (Western Tethys).
Walker and Walker (1984) showed that similarities between Ascarina and one Aptian pollen type identified as C.
The analysis has been focused on a package of six beds belonging to a Barremian-Lower Aptian shallow-water carbonate succession [28] cropping in the SW slope of Mt.
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].
The area where this happened is called Aptian Salt, or Angola Basin.
Crystallographic and chemical variations during pyritization in the upper Barremian and lower Aptian dark claystones from the Lower Saxonian Basin (NW Germany): Sedimentology, 37, pp.
Track of fluid paleocirculation in dolomite host rock at regional scale by the Anisotropy of Magnetic Susceptibility (AMS): an example from Aptian carbonates of La Florida, Northern Spain.
(2007): Environmental changes during marl-limestone formation: Evidence from the Gargasian (Middle Aptian) of La Marcouline Quarry (Cassis, SE France).