The Barremianfaunal stage was a period of geological time between 117 and 113 million years ago. It is considered to be of the lower Cretaceous period. Faunal stages are a subdivision of geologic time used primarily by paleontologists who study fossils rather than by geologists who study rock formations. ... 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. ...
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. ... The Early Cretaceous (timestratigraphic name) or the Lower Cretaceous (logstratigraphic name), is the earlier of the two major divisions of the Cretaceous period. ... The Cretaceous period is one of the major divisions of the geologic timescale, reaching from the end of the Jurassic period (about 135 mya) to the beginning of the Paleocene epoch of the Tertiary period (65 mya). ... In the geologic timescale, the Berriasian is the age of the Lower Cretaceous epoch of the Cretaceous period of the Mesozoic era of the Fanerozoic eon that is comprehended between 145 million 500 thousand and 140 million 200 thousand years ago, approximatedly. ... In the geologic timescale, Valanginian is an age of the Lower Cretaceous epoch of the Cretaceous period of the Mesozoic era of the Phanerozoic eon. ... Jump to: navigation, search In the geologic timescale, the Aptian is the age of the Lower Cretaceous epoch of the Cretaceous period of the Mesozoic era of the Phanerozoic eon that is comprehended between 125 and 112 million years ago, approximately. ... Jump to: navigation, search Albian (Fr. ... Jump to: navigation, search The Campanian is a stage on the geologic time scale occuring from 83. ... The Maastrichtian is the last age of the Cretaceous period, and therefore of the Mesozoic 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. ...
Attempts to use the microscopic remains of fossil pollen and spores have proved partially successful, and some approximate dates have been determined suggesting that the exposed Wessex Formation is entirely Barremian (Hughes and McDougall 1990).
As none of the Wealden Group is considered to be older than Barremian, an approximate maximum age for the Isle of Wight dinosaur assemblage is approximateley 130 million years b.p.
On the Isle of Wight only the upper part of the Hauterivian is seen, where, at Hanover Point the so-called Pine raft, an accumulation of fossil tree trunks in a sandstone channel is placed at the Hauterivian-Barremian boundary by Hughes and McDougall (1990).
Finally, the region experienced three periods of rapid sea level increase: (1) early Valanginian to early Hauterivian (this episode may have occurred in two stages), (2) middle Hauterivian, and (3) late Hauterivian to early Barremian.
During these periods, the carbonate slopes on which coral reefs had developed "drowned." That is, the sea rose and the platforms came to be submerged below the zone optimal for photosynthesis.
As we might expect, complex, intermediate patterns are observed in France, Jamaica, and Venezuela where rudists established themselves in the Hauterivian or Barremian.
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