Allyn River Member
From Wikipedia, the free encyclopedia
The Allyn River Member is a geologic member in the New England Orogen in eastern Australia.
Unit ofFlagstaff Formation, Australia
Thicknessup to 1,000 metres (3,280 ft)
| Allyn River Member | |
|---|---|
| Stratigraphic range: Viséan ~ | |
A cliff above the Allyn River, Australia | |
| Type | Geological formation |
| Unit of | Flagstaff Formation, Australia |
| Thickness | up to 1,000 metres (3,280 ft) |
| Lithology | |
| Primary | Sandstone, mudstone |
| Other | Turbiditic sedimentary structures |
| Location | |
| Coordinates | 32.308110°S 151.514747°E |
| Region | Hunter Valley |
| Country | Australia |
| Type section | |
| Named for | Allyn River |
| Named by | D.Lindley |
| Year defined | 1988 |
| Region | New South Wales |
| Country | Australia |
| Thickness at type section | 740 |
  Allyn River Member (Australia)  Allyn River Member (New South Wales) | |
Seen in the Hunter River region near Dungog, this stratum is up to 1,000 metres thick, though 740 metres thick at its type locality. Formed in the Visean between 346.7 and 330.9 Ma., it is part of the Flagstaff Formation of sedimentary rocks.
This stratigraphic unit includes green to brown, medium thickly bedded lithic sandstone with turbiditic sedimentary structures and interbeds of brown thinly bedded mudstone.[1][2]
-crop.jpg){kind=small}