Rocks
Rocks may be divided into three broad groups as {Igneous rocks}, {Sedimentary rocks} and {Metamorphic rocks}.
Glossary
Dura board, dura rock
panel made out of concrete and fiberglass usually used as a ceramic tile backing material. Commonly used on bathtub decks.
Glossary
Unstable ground
There are some extensive areas of ground in this country where mining and excavations for coal and excavations for taking
Glossary
Trial pits
To make an examination of the subsoil on a building site, trial pits or boreholes are excavated. Trial pits are
Glossary
Made up ground
Areas of low lying ground near the coast and around rivers close to towns and cities have been raised by
Glossary
Frost heave
Where the water table is high, that is near the surface, soils, such as silts, chalk, fine gritty sands and
Glossary
Fine grained cohesive soils
Fine grained cohesive soils, such as clays, are a natural deposit of the finest siliceous and aluminous products of rock