Where on Earth? - October 2014

Clues for October 2014:

1. This 1.1-kilometer-wide crater is thought to have been formed by a chondritic impactor 30 to 50 meters in diameter that struck Earth about 220,000 years ago. The crater’s name translates to “place of salt,” a reference to the saline deposits that have drawn visitors to the feature since the Late Pleistocene.

2. Originally about 200 meters deep, the crater has partially filled with sediment over time, leaving it about 100 meters deep. Coring and analyses of these sediments have yielded valuable information about the region’s climatic history.

3. Located about 40 kilometers north of the administrative capital (not to be confused with the judicial or legislative capitals) of its host country, the crater is within a 20-square-kilometer conservation area that is home to a diversity of plants and wildlife, including mammals such as genets and steenbok.


Name the crater and its host country.

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Answer: Situated about 40 kilometers north of South Africa’s administrative capital, Pretoria, Tswaing Crater is thought to have been formed by a 30- to 50-meter-wide meteorite about 220,000 years ago. The name translates to “place of salt” in the Setswana language, referring to the salt deposits found within the crater. Photo is by Christopher Keane.

October Winners:
Mary Dowse (Silver City, N.M.)
Wright Horton (Herndon, Va.)
Christian Koeberl (Vienna, Austria)
Michael Main (Durban, South Africa)
Lynette Oleary (Yorkville, Ill.)

To submit your photographs to our Where on Earth? contest, send them via e-mail to



30 Sep 2014