Glossary

Inter-Agency Committee on Marine Science and Technology.

See International Council for the Exploration of the Seas

Most igneous rocks have crystallised (solidified) from a magma (liquid) state and are either pushed out on the surface as volcanoes (extrusive) or pushed into the rocks forming the earth's crust (intrusive).

See Interim Marine Aggregates Dredging Policy

Any change to the environment, whether adverse or beneficial, wholly or partially resulting from an organisations activities, products or services.

Residual solid material resulting from the combustion process in municipal solid waste incineration facilities, which can be used as a secondary aggregate by the construction industry.

Impacts on the environment, which are not a direct result of the development or industrial process, but are often produced away from it or as a result of a complex pathway. Sometimes referred to as secondary impacts. (Smothering of benthos is an example of an indirect impact).

Material which will not react with or be significantly altered by other material. It is stable.

Animals that live within a sediment.

An interval of warmer global average temperature that separates glacial periods.

Interim Marine Aggregates Dredging Policy, is an interim document that forms a part of the integrated strategy for the supply of fine aggregates to South Wales.3 The provision of dredged aggregates to South Wales is considered in the context of Minerals Technical Advice Note (Wales) 1: Aggregates; ensuring that supply is managed in a sustainable way and maximising the use of secondary and recycled material.

International Council for the Exploration of the Seas. An inter-governmental organisation concerned with marine and fish science.

A contour line of equal depth.