| Kalkkop crater | |
|---|---|
  | |
| Impact crater/structure | |
| Confidence | Confirmed |
| Diameter | 0.64 kilometres (0.40 mi) |
| Age | 0.25 ± 0.05 Ma |
| Exposed | Yes |
| Drilled | Yes |
| Country | South Africa |
| Province | Eastern Cape Province |
| Municipality | Aberdeen, Eastern Cape |
Kalkkop is an impact crater which can be found on a private farm 50 kilometres (31 mi) south east of the town of Aberdeen, Eastern Cape, in the Eastern Cape Province of South Africa. The name is derived from two Afrikaans words, namely "kalk" meaning limestone and "kop" meaning head.[1]
The meteorite impact occurred about 250,000 years ago (Pleistocene) on what is now the flat Karoo landscape. It left a crater 640 metres in diameter and a few hundred metres deep. Over time, draining water left a limestone deposit 88 metres deep. This lies over a breccia layer a further 210 metres deep. Only a weathered circular ridge is still visible at the surface.
This is one of four confirmed impact sites in South Africa and six within the Southern African region.[2]
References
[edit]- ^ "Kalkkop". Earth Impact Database. Planetary and Space Science Centre University of New Brunswick Fredericton. Retrieved 15 August 2009.
- ^ "Africa". Earth Impact Database. Planetary and Space Science Centre University of New Brunswick Fredericton. Retrieved 4 May 2017.
32°42′29″S 24°25′56″E / 32.70806°S 24.43222°E
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction