Shoemaker crater
Coordinates: 25 ° 52 ′ S , 120 ° 53 ′ E
The Shoemaker crater (formerly known as Teague ring or Teague-Dome ) is a large, heavily eroded impact structure in Western Australia .
geography
The remains of the impact crater are about 100 km north-northwest of Wiluna . The crater is named after the geologist , impact researcher and astronomer Eugene Shoemaker . The conspicuous ring-shaped terrain structure can be seen well on satellite images. There are several salt lakes in the area that periodically have water. The largest lake is Lake Teague .
discovery
As early as 1974, H. Butler published a hypothesis about a possible impact origin of the structure. Subsequent investigations confirmed this assumption, so beam cones and shock effects were found in quartz . A central elevation with a diameter of about 12 km is followed by an annular depression of about 30 km in diameter. The original diameter of the crater is estimated to be at least 40 km. The age of the impact structure is given as around 1.63 billion years. More recent dates, however, show an age of 1.3 to 0.568 billion years.
See also
Individual evidence
- ↑ The Shoemaker and Strangways Craters ( Memento of the original from June 18, 2004 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. (PDF; 4.4 MB)
- ↑ Pirajno, F. (2002): Geology of the Shoemaker Impact Structure, Western Australia: Western Australia Geological Survey, Report 82.
Web links
- Shoemaker Earth Impact Database, accessed April 7, 2016