The BGS Lexicon of Named Rock Units — Result Details

Park Breccia

Computer Code: CMPB Preferred Map Code: notEntered
Status Code: Index Level
Age range: Ediacaran Period (AD) — Ediacaran Period (AD)
Lithological Description: Grey, sediment-raft volcaniclastic breccia consisting of angular, commonly elongate or raft-shaped fragments of fine-grained, laminated tuff in a coarse-grained matrix of plagioclase and quartz crystal fragments.
Definition of Lower Boundary: Not seen.
Definition of Upper Boundary: Gradational upward passage into grey, bedded tuffs of the Beacon Hill Formation.
Thickness: c.5m
Geographical Limits: The unit probably extends laterally for several kilometres, around the nose of the south-plunging Charnwood anticline, but is only seen at Bradgate Park in the east, and by the road bridge carrying the B587 across the A50 at Raunscliffe [SK4863 1090], to the west.
Parent Unit: Beacon Hill Formation (CMBH)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Reference Section  Natural exposure showing middle and upper part of the unit. In Bradgate Park (Charnwood Forest), 100m north of the Sliding Stone Enclosure. Worssam and Old, 1988. 
Worssam, B C and Old, R A, 1988. Geology of the country around Coalville. Memoir of the British Geological Survey, Sheet 155 (England and Wales) 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable