Connolly Basin crater

Connolly Basin is a 9 km-diameter impact crater located in the Gibson Desert of central Western Australia.[1] It lies adjacent to the Talawana Track 45 km west of the junction (Windy Corner) with the Gary Highway, but is difficult to access due to the remoteness of the area. It was originally thought to be a diapir (salt dome); an impact origin was first proposed in 1985.[2],[3]

Connolly Basin crater
Landsat image of the Connolly Basin crater (circular feature in centre); screen capture from NASA World Wind
Impact crater/structure
ConfidenceConfirmed
Diameter9 km (5.6 mi)
Depth25–30 m (82–98 ft)
Age<60 Ma
Paleocene
ExposedYes
DrilledNo
Location
LocationGibson Desert
Coordinates23°32.3′S 124°45.4′E
CountryAustralia
StateWestern Australia
Location of the crater in Western Australia
AccessTalawana Track

Description
Oblique Landsat image draped over digital elevation data (x10 vertical exaggeration), Connolly Basin crater (circular depression in centre); screen capture from NASA World Wind

The depression has a topographic rim 25–30 m high, while the centre displays a slight circular rise about 1 km in diameter and 5 m high exposing strongly deformed and steeply dipping bedrock interpreted as a central uplift.[4],[5] Sedimentary rocks comprising the rim are of Early Cretaceous to Palaeogene age, while uplifted rocks in the centre are likely of Early Permian age, all part of the Canning Basin; the impact event itself is inferred to be of Paleocene (early Paleogene) age or later.[4],[5]

References
  1. "Connolly Basin". Earth Impact Database. Planetary and Space Science Centre University of New Brunswick Fredericton. Retrieved 2009-08-19.
  2. Shoemaker E.M. & Shoemaker C.S. 1985. Impact structures of Western Australia. 48th Annual Meeting of the Meteoritical Society, Abstracts. Meteoritics 20, 754-756.
  3. Shoemaker E.M. & Shoemaker C.S. 1986. Connolly Basin: a probable eroded impact crater in Western Australia. Lunar and Planetary Science Conference XVII, Abstracts, p. 797-798.
  4. Shoemaker E.M. & Shoemaker C.S. 1989. Geology of the Connolly Basin impact structure, Western Australia. In: Lunar and Planetary Science Conference XX, Abstracts p. 1008-1009.
  5. Shoemaker E.M., Plescia J.B., Shoemaker C.S. 2001. Connolly Basin Impact Structure, Western Australia. Lunar and Planetary Science Conference XXXII, Abstract no. 1311.PDF
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.