Talundilly - Hypervelocity Impact Crater

Alternate Names
Local Language
Coordinates 24° 49' 60" S; 144° 30' 0" E
Notes
  1. Possible twin impact to the Tookoonooka impact structure located 328 km S.
Country Australia
Region Queensland
Date Confirmed 2012
Notes
  1. PDFs in quartz were identified in drill cuttings (Gorter and Glikson, 2012).
Buried? Yes
Notes
  1. Structure is buried ~1000 m below the surface (Gorter and Glikson, 2012).
Drilled? Yes
Notes
  1. One well drilled 32 km northwest from the central high (Gorter and Glikson, 2012).
Target Type Sedimentary
Notes
  1. The early Cretaceous target includes the Cadna-Owie Formation (sandstone, siltstone), Wyandra Sandstone Member, Bulldog Shale, and Wallumbilla Formation (mudstone and siltstone) during a time of marine transgression (Gorter and Glikson, 2012).
Sub-Type Sandstone, Shale, Siltstone
Apparent Crater Diameter (km) 84 km
Age (Ma) ~125
Notes :
  1. Age correlates with a marine transgression and is suggested to be contemporaneous with the Tookoonooka impact at ~125 Ma (Gorter and Glikson, 2012).

Method :
  1. Stratigraphy Seismic correlation
Impactor Type Unknown

Advanced Data Fields

Notes

Erosion
4
  1. Ejecta has not been identified but only one drill site exists within the structure. Seismic reflections indicated a faulted rim area (Gorter and Glikson, 2012).
Final Rim Diameter
Unknown
Apparent Rim Diameter
84 km
  1. Diameter estimated at 84 km based on maximum extent of horizon disruption in seismic profiles and centred on the mid point of the TMI (total magnetic intensity) high (Gorter and Glikson, 2012).
Rim Reliability Index
2
Crater Morphology
Complex
Central Uplift Diameter
km
Central Uplift Height
Unknown
Uplift Reliability Index
Structural Uplift
Unknown
Thickness of Seds
Target Age
Mesozoic
Marine
Yes
Impactor Type
Other Shock Metamorphism
No
Shatter Cones
No
Planar Fractures
Yes
  1. PFs present in some quartz grains from drill cuttings (Gorter and Glikson, 2012).
Planar Deformation Features
Yes
  1. PDFs found in quartz grains from drill cuttings. 19 planar sets in 10 quartz grains from 8 rock fragments were indexed (Gorter and Glikson, 2012).
Diaplectic Glass
No
Coesite
No
Stisovite
No
Crater Fill
Proximal Ejecta
Distal Ejecta
Dykes
Volume of Melt
Depth of Melting