The BGS Lexicon of Named Rock Units — Result Details

Blockfield

Computer Code: BLOC Preferred Map Code: notEntered
Status Code: Full
Age range: Quaternary Period (Q) — Quaternary Period (Q)
Lithological Description: Blockfield refers to an in situ, or nearly in situ, accumulation of frost-shattered rock blocks of different sizes and shapes on level or gently sloping mountain surfaces, derived from subjacent bedrock. The formation of blockfield is dependant on rock lithology and structure. Frost-susceptable, foliated rocks (for example schists) will break down to finer grained detritus (regolith). Blockfields sensu stricto are openwork and are characterised by the absence of soil accumulations. Obsolete: felsenmeer. Variable lithology.
Definition of Lower Boundary: none recorded or not applicable
Definition of Upper Boundary: none recorded or not applicable
Thickness: none recorded or not applicable
Geographical Limits: none recorded or not applicable
Parent Unit: Residual deposits (RDEPS)
Previous Name(s): Felsenmeer (FMEER)
Alternative Name(s): none recorded or not applicable
Stratotypes:
none recorded or not applicable
Reference(s):
McMillan, A A and Powell, J H. 1999. The classification of artificial (man made) ground and natural superficial deposits. British Geological Survey Research Report, RR/99/04. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S071 S102 S131