Veevers crater

Coordinates: 22°58′12″S 125°22′21″E / 22.97°S 125.3725°E / -22.97; 125.3725
Source: Wikipedia, the free encyclopedia.

Veevers crater
Veevers Meteorite Crater, August 2011
Impact crater/structure
ConfidenceConfirmed
Diameter80 m (260 ft)
Age<1 Ma
Pleistocene
ExposedYes
DrilledNo
Bolide typeiron meteorite (IIAB)
Location
LocationGreat Sandy & Gibson Deserts
Coordinates22°58′12″S 125°22′21″E / 22.97°S 125.3725°E / -22.97; 125.3725
CountryAustralia
StateWestern Australia
Veevers crater is located in Western Australia
Veevers crater
Location of the crater in Western Australia

Veevers crater is an impact crater located on a flat desert plain between the Great Sandy and Gibson Deserts in the centre of the state of Western Australia.[1]

The site is very remote and difficult to visit. The crater was discovered from the air in July 1975[2] during a government geological survey and named in honour of Australian geologist John Veevers[3] who had worked in the area in the late 1970s.[4] At the time of discovery a meteorite impact origin was suspected, but could not be proven. The subsequent discovery of iron meteorite fragments around the crater by E.M. and C.S. Shoemaker in 1987[5] removed any doubt about its origin.

Description

The crater has a symmetrical bowl-shaped topography and is considered to be one of the best preserved small meteorite craters on Earth.[6] The 20 m (66 ft) wide rim rises about 1.5 m (4 ft 11 in) above the plain, while the deepest point of the central depression is 7 m (23 ft) below the rim crest; the rim to rim diameter averages about 70 m (230 ft).[4][6] Based on cosmogenic nuclide exposure dating of the crater walls, the crater is less than 20 thousand years old, while the pristine state of preservation of the ejecta has been used to suggest that it may in fact be less than 4 thousand years old.[6]

The iron meteorite fragments collected around the crater are classified as a coarse octahedrite belonging to chemical class IIAB; the fragments show considerable evidence of deformation presumably related to the impact explosion.[7] It has been inferred that the original meteorite was in the size range of 100–1,000 tonnes (220–2,200 thousand pounds), probably closer to the latter, now dispersed as fragments within the crater breccia and ejecta.[6]

See also

  • 3689 Yeates

References

  1. ^ "Veevers". Earth Impact Database. Planetary and Space Science Centre University of New Brunswick Fredericton. Retrieved 20 August 2009.
  2. ISBN 0-7309-5926-0
  3. ^ Veevers Biography.
  4. ^
    BMR Journal of Australian Geology & Geophysics
    . 1: 77–8.
  5. ^ Shoemaker EM, Shoemaker CS (1985). "Impact structures of Western Australia". Meteoritics. 20: 754–6. PDF
  6. ^
    S2CID 130096764. Abstract[permanent dead link
    ]
  7. ^ Bevan AWR (1996). "Australian crater-forming meteorites". AGSO Journal of Australian Geology & Geophysics. 16: 421–9.
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