Computer Code: |
BLST |
Preferred Map Code: |
notEntered |
Status Code: |
Full |
Age range: |
Kimmeridgian Age (JD)
— Kimmeridgian Age (JD) |
Lithological Description: |
Massive oil shale with calcareous and pyritic concretions and pyritized Saccocoma. |
Definition of Lower Boundary: |
Sharp transition to mudstone (sometimes calcareous) of the Kimmeridge Clay Formation. |
Definition of Upper Boundary: |
Sharp transition between the Blackstone oil shale and overlying mudstone of the Kimmeridge Clay Formation. |
Thickness: |
0.6 m. |
Geographical Limits: |
Dorset. |
Parent Unit: |
Kimmeridge Clay Formation (KC)
|
Previous Name(s): |
none recorded or not applicable
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
Type Section |
The cliff sections between Kimmeridge Bay [SY 905 791] and Chapman's Pool [SY 955 771]. |
Reference(s): |
Cox, B M, and Gallois, R W. 1981. The stratigraphy of the Kimmeridge Clay of the Dorset type area and it's correlation with some other Kimmeridgian sequences. Report of the Institute of Geological Sciences, No.80/4. |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
none recorded or not applicable |