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.

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References in periodicals archive ?

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

As with Well 143 the new well is initially targeting Jurassic Callovian sands at a depth of 2,200 meters with a secondary objective in the Cretaceous Valanginian limestone at a depth of 1,900 meters.

United Kingdom : Roxi Petroleum : Spudding Shallow Well 141

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.

Clay mineralogy of the Jurassic-tertiary sedimentary rocks of the Kopet Dagh basin (Northeastern Iran): implications for paleoclimate

It is Callovian and Oxfordian in age and reaches a thickness of more than 300 feet in the basinal area between the Ghawar and Khurais Fields.

Retiring old fields

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'

The LGA-1D tested a three-way dip elongated faulted closure in two Dogger limestone formations - the Callovian and the Bathonian.

Toreador Resources Provides Operations Update

The obligation to assess the Callovian reservoir through sidetracking well-09 has been deferred until 2017 however a new well location is being reviewed to meet this obligation.

United Kingdom : JKX Oil & Gas plc Half-Yearly Results Operational Review

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

Radiolarian associations are allocated to Callovian, Upper Jurassic, Lower Cretaceous and Santonian (Galli, 1977; Schmidt-Effing, 1979; Baumgartner, 1984).

The southern Central America puzzle: cronology and structure: a review

1987): The Callovian (middle Jurassic) teleosaurid marine crocodiles from central England.

Primeros restos cefalicos de Steneosaurus (Crocodylomorpha: Teleosauridae) del Jurasico Superior de Oker (Baja Sajonia, Alemania)

Behavior of organic matter from Callovian shales during low-temperature air oxidation // Ibid.

Oxidation studies on Sirnak asphaltites. Determination of kinetic parameters

Callovian and Oxfordian deposits of the south-eastern Caucasus seem to be missing.