Local Government
Nannup
Region
South West
Black Point Rd Lake Jasper
20km from milyanup homestead, 37km from Augusta. 20km SE of Milyanup.
Nannup
South West
Type | Status | Date | Documents | More information |
---|---|---|---|---|
Heritage List | Adopted | 26 Mar 2015 |
Type | Status | Date | Documents |
---|---|---|---|
(no listings) |
Type | Status | Date | Grading/Management | More information | |
---|---|---|---|---|---|
Category | Description | ||||
Register of the National Estate | Indicative Place |
|
Heritage Council | ||
Aboriginal Heritage Sites Register | Registered |
|
Heritage Council | ||
Classified by the National Trust | Classified {Lscpe} | 27 Sep 1991 |
|
Heritage Council |
Black Point is an important outcrop of the rarely exposed Bunbury Basalt, the only post Pre-Cambrian volcanic event in the geological evolution of the Perth Basin. The basalt displays perfectly formed columnar jointing, a structure developed as a result of stresses developed when the basalt cooled and solidified in Cretaceous times. It is an important scientific research site.
The site includes two prominent cliffed headlands on the south coast of the D'Entrecasteaux National Park, about 1.1km apart. Both display spectacular exposures of the Bunbury Basalt. This formation forms part of the Perth Basin sequence and is rarely exposed at surface, though it is well known from drill intersections and geophysical studies. The formation also provides an important aquifer in the Bunbury region. The basalt shows well developed columnar cooling structures and has well developed sheet jointing. Basalt has been eroded along these joints to form a terraced outcrop. Black Point is the only site in the Perth Basin where late injection basaltic dykes occur.
Ref Number | Description |
---|---|
005 | Shire of Nannup MHI |
Categories of Significance:
- Educational
- Scientific
Library Id | Title | Medium | Year Of Publication |
---|---|---|---|
2368 | Black Point : nomination of a geological monument for the register of the National Estate. | Book | 1991 |
Geological monument
Epoch | General | Specific |
---|---|---|
Present Use | OTHER | Other |
Original Use | OTHER | Other |
General | Specific |
---|---|
SOCIAL & CIVIC ACTIVITIES | Education & science |
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