• Source: Britannia Catchments Group

The Britannia Catchments Group is a Quaternary lithostratigraphic group (a sequence of rock strata or other definable geological units) present in all parts of Great Britain and including the Isle of Man. It includes a wide range of deposits including alluvium, river terrace deposits, peat, head, cover sand and blown sand of fluvial, lacustrine, mass movement, periglacial and aeolian origin. Its lower boundary is defined as an unconformable contact with the underlying Albion Glacigenic Group (in England and Wales), the Caledonia Glacigenic Group (in Scotland), the Dunwich Group, Crag Group or with older bedrock. Its upper boundary is generally the present day ground surface but it interfingers locally with the British Coastal Deposits Group.
The group is subdivided into more geographically restricted subgroups by river catchments of which the following are defined:

Northern Highlands and Argyll Catchments Subgroup
Grampian Catchments Subgroup
Tay Catchments Subgroup
Forth Catchments Subgroup
Clyde Catchments Subgroup
Tweed Catchments Subgroup
Solway Catchments Subgroup
Northumbria Catchments Subgroup
Isle of Man Catchments Subgroup
Cheshire-North Wales Catchments Subgroup
Yorkshire Catchments Subgroup
Trent Catchments Subgroup
Severn and Avon Catchments Subgroup
West Wales Catchments Subgroup
Ouse-Nene Catchments Subgroup
Yare Catchments Subgroup
Somerset Catchments Subgroup
Thames Catchments Subgroup
Suffolk Catchments Subgroup
Cornubian Catchments Subgroup
Solent Catchments Subgroup
Sussex Catchments Subgroup
South Kent Catchments Subgroup
Subgroups may also be defined for the various Scottish island groups.




References

Kata Kunci Pencarian:

• Britannia Catchments Group
• Dunwich Group
• Albion Glacigenic Group
• Great Britain Superficial Deposits Supergroup
• Caledonia Glacigenic Group
• British Coastal Deposits Group
• List of geological groups of Great Britain
• Britannia (TV series)
• Britannia High
• List of Code Geass characters