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Speldon Formation STRATNO: 23984
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: 13-DEC-07
Replaced by: Previously known as:
Description: Well-bedded pebbly sandstone, bioturbated mudstone, pebble conglomerate, coarse lithic sandstone.
Comments: For use in the Stroud-Gloucester Trough
Geological province: No quality assured province information available
Type state: Reference section type:
Maximum thickness: 80m Minimum thickness:

Unit Age
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:

  • Speldon Formation- Formation, beds- Formal

Related units: Relationship: Contact Type:
Avon Subgroup underlies Speldon Formation

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 (p179, p168 Tb. 2) Min age from reference: Late Permian Max age from reference: Late Permian Comments: Of the Gloucester Coal Measures, dividing the lower Avon Subgroup from the upper Craven Subgroup. Max. thickness: 76.8m. 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 Gloucester Coal Measures. Well-bedded pebbly sandstone, bioturbated mudstone, pebble conglomerate, coarse lithic sandstone. Max. thickness: 80m. 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: Gloucester Coal Measures. Geological Province: New England Fold Belt
REFID: 43017 Briggs, D.J.C. 1993 Time control in the Permian of the Sydney-Bowen Basin and the New England Orogen; In Findlay, Unrug, Banks, & Veevers (eds) Gondwana Eight. Assembly, evolution and dispersal. Proceedings of the Eighth Gondwana Symposium, Hobart, Tasmania, A A.A. Balkema, Rotterdam 1v p371-383
Usage: Briefly described (Fig.1,p372) Comments:
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: Geological Province: Western Myall Block.
REFID: 40883 Roberts, J. , Engel, B.A. 1987 Depositional and tectonic history of the southern New England Orogen. Australian Journal of Earth Sciences 34(1) p1-20
Usage: Mentioned (p9) Comments:
REFID: 41054 McMinn, A. 1987 Palynostratigraphy of the Stroud Gloucester Trough, N.S.W. Alcheringa 11(2) p151-164
Usage: Mentioned (p152) Comments: See also Fig.2
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: 8
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