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Callovian

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Callovian

[kə′lōv·ē·ən]
(geology)
A stage in uppermost Middle or lowermost Upper Jurassic which marks a return to clayey sedimentation.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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References in periodicals archive
It is of geological importance as a large glacial meltwater channel and for sections of exposed Callovian age strata.
North Yorkshire farmer admits Wildlife & Countryside offences on Site of Special Scientific Interest
The cranial anatomy and taxonomy of Peloneustes philarchus (Sauropterygia, Pliosauridae) from the Peterborough Member (Callovian, Middle Jurassic) of the United Kingdom, Palaeontology.
A new large Pliosaurid from the Barremian (Lower Cretaceous) of Sachica, Boyaca, Colombia/Un nuevo Pliosaurido de gran tamano del Barremiano (Cretacico Inferior) de Sachica, Boyaca, Colombia
Response of foraminiferal facies to transgressive-regressive cycles in the Callovian of Northest Scotland, Journal of Foraminifera Research, 3, 324-349.
Biostratigraphy, depositional environment and sequence stratigraphy of Late Cretaceous clastic-evaporite-carbonate deposits, east of Central Iran, Bajestan
The increase in kaolinite contents in the Callovian suggests a subtropical humid climate with less prominent seasonal droughts and a higher input of siliclastics into the basin accompanied by a higher nutrient influx (Fursich et al., 2005).
Clay mineralogy of the Jurassic-tertiary sedimentary rocks of the Kopet Dagh basin (Northeastern Iran): implications for paleoclimate
He added that during the Middle Callovian 165 million years ago, much of Europe was covered by a shallow sea, creating a chain of large to small islands.
World's oldest super predator 'terrorized Europe'
(2009): Oxygen and carbon isotope composition of Callovian-Lower Oxfordian (Middle-Upper Jurassic) belemnite rostra from central Poland: A record of a Late Callovian global sea-level rise?
On the microstructure, growth pattern and original porosity of belemnite rostra: insights from calcitic Jurassic belemnites
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