The Brent Group is a
stratigraphic group
In geology, a group is a lithostratigraphic unit consisting of a series of related formations that have been classified together to form a group. Formations are the fundamental unit of stratigraphy. Groups may sometimes be combined into superg ...
of
Middle Jurassic
The Middle Jurassic is the second epoch of the Jurassic Period. It lasted from about 174.1 to 163.5 million years ago. Fossils of land-dwelling animals, such as dinosaurs, from the Middle Jurassic are relatively rare, but geological formations ...
age. It is an important
hydrocarbon reservoir in the
Northern North Sea. It is named for the
Brent oil field, where it forms one of the reservoir units.
It is subdivided into five formations, in order of age, the
Broom
A broom (also known in some forms as a broomstick) is a cleaning tool consisting of usually stiff fibers (often made of materials such as plastic, hair, or corn husks) attached to, and roughly parallel to, a cylindrical handle, the broomstick. ...
,
Rannoch
Rannoch ( gd, Raineach or , meaning ' bracken') is an area of the Scottish Highlands between the A9 road, to the east, and the A82, to the west. The area is crossed from south to north by the West Highland railway line.
Features of the area ...
,
Etive,
Ness
Ness or NESS may refer to:
Places Australia
* Ness, Wapengo, a heritage-listed natural coastal area in New South Wales
United Kingdom
* Ness, Cheshire, England, a village
* Ness, Lewis, the most northerly area on Lewis, Scotland, UK
* Cuspat ...
and
Tarbet Formations whose first letters spell out the name of the group.
References
{{Reflist
Geology of the North Sea