Heron Group Explained

Heron Group
Type:	Group
Age:	Late Triassic Epoch
Region:	North Sea
Country:	Scotland
Overlies:	Zechstein Group

The Heron Group is a Triassic lithostratigraphic group (a sequence of rock strata) beneath the central and northern North Sea which is composed of alluvial deposits.^{[1] [2]}

Notes and References

1. Stratigraphical Chart of the United Kingdom:Northern Britain, British Geological Survey
2. http://www.bgs.ac.uk/Lexicon/lexicon.cfm?pub=HERO (BGS on-line lexicon of rock units)