Last edited 08 Oct 2020


The term ‘conglomerate’ may refer to a rock that contains gravel or cobble size material within a finer grained matrix. Ref The HS2 London-West Midlands Environmental Statement, published by the Department for Transport in November 2013.

NB Green infrastructure and open environments: London’s foundations: protecting the geodiversity of the capital, Supplementary Planning Guidance, published by the Mayor of London in March 2012, defines a conglomerate as: ‘A sedimentary rock, a significant proportion of which is composed of rounded pebbles and boulders, greater than 2 mm in diameter, set in a finer-grained groundmass.’

It may also refer a parent company that has subsidiary companies trading in unrelated markets. Conglomerates have a legal identity separate from the subsidiaries, but are generally liable for the debts of subsidiary companies. For more information see: Types of construction organisations.

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