Kelly West crater

Kelly West is a deeply eroded impact crater, (impact structure or astrobleme), situated in the central Northern Territory, Australia. It was discovered during Government geological mapping and first reported in 1973, the evidence for impact coming principally from an abundance of shatter cones at the site.cite journal | author=Tonkin PC | title=Discovery of shatter cones at Kelly West near Tennant Creek, Northern Territory, Australia | journal=Geological Society of Australia, Journal | volume=20 | issue= | year=1973 | pages=99–102 | id= ]

The surface expression of Kelly West comprises a circular hill of Palaeoproterozoic quartzite about 2 km in diameter, interpreted as a central uplift of a larger complex impact crater.cite journal | author=Shoemaker EM, Shoemaker CS | title=The Proterozoic impact record of Australia | journal=AGSO Journal of Australian Geology & Geophysics | volume=16 | issue= | year=1996 | pages=379–398 | id= ] Recent geophysical interpretation suggests an original crater diameter of 6.6 km,cite journal | author=Plescia JB | title=Kelly West Impact Structure, Australia | journal=Lunar and Planetary Science Conference XXXVII | volume= | issue= | year=2006 | pages=Abstract #1259 | id= [http://www.lpi.usra.edu/meetings/lpsc2006/pdf/1259.pdf Conference abstract] ] less than earlier estimates of about 10 km. The age is poorly constrained, but must be older than Middle Cambrian because sedimentary rocks of this age overlie the central uplift and were not deformed by the impact event. ]

References

External links

* [http://www.unb.ca/passc/ImpactDatabase/images/kelly-west.htm Kelly West at Earth Impact Database]