GradeGen

Loose material lying above bedrock, such as sand, gravel or clay deposited by earlier processes.

Distinguish bedrock, the underlying solid rock, from superficial deposits, the loose material above it. For an explanation of a rocky headland or cliff, bedrock is especially important. Surface deposits may conceal that bedrock rather than replace it.

Revise: Using BGS and OS Maps for Coastal Landscapes

Loose geological deposits lying above bedrock, such as river sediment or material deposited by glaciers.

Revise: River Characteristics and Profiles

Relatively young geological deposits lying above bedrock, often consisting of unconsolidated gravel, sand, silt or clay.

Revise: Secondary data sources