acritarch


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acritarch

(ˈækrɪˌtɑːk)
n
a type of small fossil
References in periodicals archive ?
This unit is unfossiliferous, although its suggested equivalent in Belarus, the Lyozno Regional Stage, contains an acritarch assemblage that differs considerably from the assemblages in the overlying strata (Kruchek et al.
There are many techniques for shale maturation measurement, but the simplest and easiest is certainly the popular Conodont Alteration Index (CAI) that can also be used with acritarch organic material.
Among the NPPs, there are dinoflagellate and acritarch cysts which are indicators for marine environments (sea water influence by tides and marine transgressions (Dale, 1976; Hoek et al.
2003): First spore, pollen and acritarch associations in the Ida Ou Ziki basin (southern slope of the Western High Atlas, Morocco).
The researchers found 30 acritarch species, 13 of which had never been seen before.
An acritarch assemblage sampled from the North Alton Formation indicates a Jiangshanian (mid-Furongian) age (White et al.
The acritarch record of Australia indicates that pre- and post-Snowball populations are identical and do not indicate repopulation of marine areas by extremophiles that survived both catastrophic glaciation in hot springs and the brutal greenhouse conditions which followed (Grey et al.
present the discovery of the messaoudensis-trifidum acritarch assemblage in the upper Tremadocian-lower Floian, Lower Ordovician of Morocco.
1990; Mens & Pirrus 1997) and possibly to the Asteridium tornatum-Comasphaeridium velvetum acritarch Zone (Moczydlowska 1991).
The conodont faunas from this area have been studied intensively and David Gelsthorpe (University of Leicester, UK) is currently engaged in a detailed study of acritarch diversity changes through the Ireviken Event in NW Gotland.
The messaoudensis-trifidum acritarch assemblage is known from upper Tremadocian to lower Floian (Lower Ordovician) strata in many localities on the Gondwanan margin (Servais et al.