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
Stratotypes:
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. 
Reference(s):
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