Cainozoic stratigraphy at Wellington Caves, New South Wales
| Main Author: | Osborne, R. A. L. |
|---|---|
| Format: | Article Journal |
| Bahasa: | eng |
| Terbitan: |
, 1983
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/6390282 |
Daftar Isi:
- A sequence of Cainozoic sediments infills karst cavities of the Devonian Garra Formation at Wellington Caves, N.S.W. The sequence is divided into two formations, the older Phosphate Mine Beds and the younger Mitchell Cave Beds. These are subdivided into informal lithostratigraphic units. The Phosphate Mine Beds are composed of laminated clays, phosphorites, and indurated entrance facies deposits, along with osseous sandstones and conglomerates deposited by turbidity currents in a nothephreatic environment. The Mitchell Cave Beds consist of entrance facies and bone breccia. An unconformity separates the two formations, and has a complex geometry. It is the product of a period of phreatic speleogenesis that excavated cavities within the Phosphate Mine Beds. The Mitchell Cave Beds infill these cavities. The Mitchell Cave Beds are most likely Pleistocene-Recent in age while the Phosphate Mine Beds may extend back into the Tertiary.