Geology
Life on the Bouddi Peninsula is shaped by rocks. They give us our beautiful golden beaches, the sandstone escarpments with sheer cliffs, the enclosed waterways and a wide range of birds and animals.
The Trust held an exhibition on the geology of the area in 2000. Judy Adderly was the prime mover, assisted by Pat McConchie, Jeannette Thiering, Ian Thiering and others. A web-based version of this excellent exhibition, Geology Exhibition 2000 was prepared by Peter Adderly, Judy’s son.
Detailed maps of the soils in the peninsula are found in the Bouddi Study: Rocks and Soils and Profiles. The McRae study of the flora of the area also has a detailed map.
Note that the Gosford formation and the Terrigal formation are essentially the same thing. They are the local version of the Narabeen series. These terms refer the older layer of sedimentary rocks that lies under the Hawksbury sandstone. This sandstone in this layer is softer than that found in the Hawksbury layer, often reddish from the iron it contains. It is mixed with shale deposits and some conglomerate rocks and contains boulders from the higher Hawksbury layer that have settled or rolled down the escarpment as part of the erosion process.
The Trust held an exhibition on the geology of the area in 2000. Judy Adderly was the prime mover, assisted by Pat McConchie, Jeannette Thiering, Ian Thiering and others. A web-based version of this excellent exhibition, Geology Exhibition 2000 was prepared by Peter Adderly, Judy’s son.
Detailed maps of the soils in the peninsula are found in the Bouddi Study: Rocks and Soils and Profiles. The McRae study of the flora of the area also has a detailed map.
Note that the Gosford formation and the Terrigal formation are essentially the same thing. They are the local version of the Narabeen series. These terms refer the older layer of sedimentary rocks that lies under the Hawksbury sandstone. This sandstone in this layer is softer than that found in the Hawksbury layer, often reddish from the iron it contains. It is mixed with shale deposits and some conglomerate rocks and contains boulders from the higher Hawksbury layer that have settled or rolled down the escarpment as part of the erosion process.
