The Callovian is a stage on the geologic time scale occuring from 164.7 +/- 4 to 161.2 +/- 4 million years ago. Jump to: navigation, search The geologic time scale is used by geologists and other scientists to describe the timing and relationships between events that have occurred during the history of the Earth. ...
It is the last stage of the Middle Jurassic. The Middle Jurassic, called the Dogger in the European system of classification, is the second epoch of the Jurassic period. ...
Jump to: navigation, search The Jurassic period is a major unit of the geologic timescale that extends from about 200 Ma (million years ago) at the end of the Triassic to 146 Ma at the beginning of the Cretaceous. ... Lower Jurassic (also known as Lias) is the earliest of three epochs of Jurassic period. ... The Middle Jurassic, called the Dogger in the European system of classification, is the second epoch of the Jurassic period. ... Upper Jurassic (also known as Malm) was an epoch of the Jurassic geologic period. ... Jump to: navigation, search The Aalenian is a subdivision of the Middle Jurassic period of the geologic timescale that extends from about 175. ... Jump to: navigation, search In the geologic timescale, the Bajocian is the age of the Middle Jurassic epoch of the Jurassic period of the Mesozoic era of the Fanerozoic eon that is comprehended between 171 million 600 thousand and 167 million 700 thousand years ago, approximatedly. ... The Toarcian Stage was the last faunal stage of the Early Jurassic period. ... Jump to: navigation, search In the geologic timescale, the Bathonian is the age of the Middle Jurassic epoch of the Jurassic period of the Mesozoic era of the Fanerozoic eon that is comprehended between 167 million 700 thousand and 164 million 700 thousand years ago, approximatedly. ... The Tithonian (141-135 MYA) is the most recent stage of the Jurassic era. ... The Mesozoic is one of three geologic eras of Phanerozoic eon. ... The Triassic is a geologic period that extends from about 245 to 202 million years ago (mya). ... Jump to: navigation, search The Jurassic period is a major unit of the geologic timescale that extends from about 200 Ma (million years ago) at the end of the Triassic to 146 Ma at the beginning of the Cretaceous. ... The Cretaceous period is one of the major divisions of the geologic timescale, reaching from the end of the Jurassic period (about 146 MYA) to the beginning of the Paleocene epoch of the Tertiary period (65. ...
CALLOVIAN (from Callovium, the Latinized form of Kellaways, a village not far from Chippenham in Wiltshire),,in geology, the name introduced by d'Orbigny for the strata which constitute the base of the Oxfordian or lowermost stage of the Middle Oolites.
Rocks of Callovian age (according to the continental classification) are widely spread in Europe, which, with the exception of numerous insular masses, was covered by the Callovian Sea.
Clays and shales with ferruginous oolites represent the Callovian of Germany; while in Russia the deposits of this age are mainly argillaceous.
Actually ammonite faunal horizons from the Lower Callovian and from the Bathonian/Callovian boundary are to be described.
The latter is of great importance for the possible Callovian stratotype which is proposed to the International Subcommission on Jurassic Stratigraphy in a section of the area of Albstadt-Pfeffingen, Zollernalb/Western Swabian Alb.
Nominate ammonite of the keppleri horizon Kepplerites keppleri, the deepest ammonite faunal horizon of the Callovian
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