The BGS Lexicon of Named Rock Units — Result Details

Middle Chalk Formation and Upper Chalk Formation (Undifferentiated)

Computer Code: MUCK Preferred Map Code: notEntered
Status Code: Index Level
Age range: Turonian Age (KT) — Campanian Age (KC)
Lithological Description: Names remain in informal use but are generally regarded as obsolete. Composite consisting of two or more rock units. See the entries for the constituent units for more information.
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: Chalk Group (CK)
Previous Name(s): Upper Chalk Formation And Middle Chalk Formation (Undifferentiated) [Obsolete Code: Use MUCK] (UMCK)
Alternative Name(s): Upper Chalk Formation
Middle Chalk Formation
Stratotypes:
none recorded or not applicable
Reference(s):
none recorded or not applicable
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E130 E241 E269