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 |