Not to be confused with Oscar Range of Miami, Florida, husband of M. Athalie Range
Oscar Range | |
---|---|
![]() The Devonian Reefs of the Oscar Range surround the range's quartzite core. | |
Highest point | |
Peak | unnamed |
Elevation | 325 m (1,066 ft) |
Naming | |
Native name | Mowambini |
Geography | |
Country | Australia |
State | Western Australia |
Region | Canning Basin |
Range coordinates | 17°49′S125°9′E / 17.817°S 125.150°E |
Geology | |
Age of rock | Proterozoic core / Devonian hills |
The Oscar Range is a small, low mountain range in the Kimberley region of Western Australia. [1] It is approximately 40 km long and 6–8 km wide. The range sits on the edge of the Lennard Shelf.
It consists of precambrian metamorphic quartzites and shales folded to produce a trellis type drainage system. Lower hills surrounding the range are made up of carbonates. [2]
The range is known for the fossil reefs that surround its peaks. These Devonian reefs are exceptionally well preserved. [3] [4]
In Devonian times, the peaks of the Oscar Range were emergent as islands. [2] The grouping of islands has been referred to as the Mowambini Archipelago, based on the Aboriginal name for the Oscar Range. The islands were surrounded by stromatoporoid reefs, which have now been exposed by erosion. [2]
The Devonian is a geologic period and system of the Paleozoic era, spanning 60.3 million years from the end of the Silurian, 419.2 million years ago (Ma), to the beginning of the Carboniferous, 358.9 Ma. It is named after Devon, England, where rocks from this period were first studied.
Windjana Gorge National Park is a national park in the Kimberley region of Western Australia, 1855 km northeast of Perth and 355 km east of Broome. It is open during the dry season only, usually April to November.
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The Muskeg Formation is a geologic formation of Middle Devonian (Givetian) age in the Western Canada Sedimentary Basin. It extends from the plains of northwestern Alberta to northeastern British Columbia, and includes important petroleum and natural gas reservoirs in the Zama lake and Rainbow Lake areas of northwestern Alberta.
The Beaverhill Lake Group is a geologic unit of Middle Devonian to Late Devonian age in the Western Canada Sedimentary Basin that is present in the southwestern Northwest Territories, northeastern British Columbia and Alberta. It was named by the geological staff of Imperial Oil in 1950 for Beaverhill Lake, Alberta, based on the core from a well that they had drilled southeast of the lake, near Ryley, Alberta.
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