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Mammy Johnsons Formation STRATNO: 23757
Current: Yes Rank: Formation, beds Status: Formal State(s): NSW
Category: Unknown or process pending Usage: Defined Definition Card: No
Originator: M.Lennox 20-MAR-85 Entry date: 01-JAN-88 Last Update: 11-JUL-12
Replaced by: Previously known as:
Description: Massive and thickly bedded lithic sandstone, pebble conglomerate and coarse grained sandstone stringers, horizons of laminated dark grey mudstone. Discontinuous thick coals and minor claystones after airfall tuffs
Comments: For use in the Stroud-Gloucester Trough
Geological province: New England Orogen
Type state: Reference section type:
Maximum thickness: 300m Minimum thickness:
Unit Age Event: deposition
Top of unit -
Minimum age: Late Permian Ma: % from base of biozone: Age method:
Maximum age: Ma: % from base of biozone: Age method:
Base of unit -
Minimum age: Ma: % from base of biozone: Age method:
Maximum age: Late Permian Ma: % from base of biozone: Age method:

Stratigraphic Hierarchy (current units only) Rank Status

Chemical Hierarchy (current units only) Rank Status


Related units: Relationship: Contact Type:
Waukivory Creek Formation overlies Mammy Johnsons Formation
Weismantels Formation underlies Mammy Johnsons Formation conformity
First Reference:
REFID: 40872 Helby, R., Lennox, M., Roberts, J., 1986, The age of the Permian sequence in the Stroud-Gloucester Trough., Royal Society of New South Wales. Journal and Proceedings, 119(1/2), p33-42

Definition Reference:
REFID: 44244 Roberts, J., Engel, B., Chapman, J., 1991, Geology of the Camberwell, Dungog, and Bulahdelah 1:100 000 sheets 9133, 9233, 9333., Geological Survey of New South Wales, 1v, 382pp

Use on maps:
REFID: 50147 Roberts, J., Engel, B., Lennox, M., Chapman, J., 1991, Dungog, New South Wales 1:100 000 Geological Sheet 9233, Geological Survey of New South Wales. 1:100,000 geological sheet series, 1v, Map


Full Bibliographic Details (ordered by usage, publication year)

REFID: 44244 Roberts, J. , Engel, B. , Chapman, J. 1991 Geology of the Camberwell, Dungog, and Bulahdelah 1:100 000 sheets 9133, 9233, 9333. Geological Survey of New South Wales 1v 382pp
Usage: Defined (p172-174, p168 Tb. 2) Min age from reference: Late Permian Max age from reference: Late Permian Comments: Of the Dewrang Group. Conformably overlies the Weismantels Formation; underlies Waukivory Creek Formation. Max. thickness: 300m. Type section in text. Geological Province: Myall Block.
REFID: 22857 Scheibner, E. , Basden, H. (ed.) 1998 Geology of New South Wales - Synthesis. Volume 2 Geological Evolution. Geological Survey of New South Wales. Memoir (Geology) 13(2) 666pp
Usage: Described (p534 App.1 Tb.A1.9) Min age from reference: Late Permian Max age from reference: Late Permian Comments: Of the Dewrang Group. Massive and thickly bedded lithic sandstone; strings of pebble conglomerate and coarse sandstone. Max. thickness: 300m. Geological Province: Sydney Basin.
REFID: 23623 Ward, C.R. , Bocking, M. , Ruan, C. 2001 Mineralogical analysis of coals as an aid to seam correlation in the Gloucester Basin, New South Wales, Australia International Journal of Coal Geology 47(1) p31-49
Usage: Briefly described (p33 Fig. 2) Min age from reference: Late Permian Max age from reference: Late Permian Comments: Parent: Dewrang Group. Geological Province: New England Fold Belt
REFID: 50147 Roberts, J. , Engel, B. , Lennox, M. , Chapman, J. 1991 Dungog, New South Wales 1:100 000 Geological Sheet 9233 Geological Survey of New South Wales. 1:100,000 geological sheet series 1v Map
Usage: Briefly described (Map legend) Min age from reference: Late Permian Max age from reference: Late Permian Comments: Of the Dewrang Group. Geological Province: Western Myall Block.
REFID: 41054 McMinn, A. 1987 Palynostratigraphy of the Stroud Gloucester Trough, N.S.W. Alcheringa 11(2) p151-164
Usage: Mentioned (p152) Comments:
REFID: 40872 Helby, R. , Lennox, M. , Roberts, J. 1986 The age of the Permian sequence in the Stroud-Gloucester Trough. Royal Society of New South Wales. Journal and Proceedings 119(1/2) p33-42
Usage: Mentioned (Fig.2) Comments:

Bibliographic references returned: 6 This data is subject to Geoscience Australia's disclaimer and copyright statements.