There are a large number of Oriented Lakes in South Africa, a sample of which are provided in the keyhole file. Azimuth 187�.


The highlighted oval in the right cnter of this elevation view is ~3 km long and 2 km wide.

Oriented Lakes & Landforms in Argentina
100 km long structure near Algarrobo Argentina
Perth, Australia loves Ovals!

Cintos, the "lake bed calligraphy" may have been marked before, but your folder of oriented lakes is what I find interesting. Do you have any more to add to that? It is very reminiscent of the "Carolina bays" in the southeast U.S. and to another grouping of oriented lakes in southeastern Australia. Those lakes are described in this thread. I've found quite a lot about the Carolina Bays, but so far nothing about the Australian lakes. Your post is the first I have ever heard of the South African lakes. They are particularly interesting because some are being mined. Meteoric material?

Greetings Hill:

Your intuition may be correct. The structure is present across most of the globe. I am attaching a keyhole file for Argentina.

The proposed morphology is discussed at perigeezero.org/treatise/Morphology/ejecta/carolina_bays

I've been looking for more information on this phenomenon for quite some time. I look forward to studying your link in its entirety. The confusing thing about the Argentinian forms is the mix of orientations that seem to show about the same amount of weathering, indicating the same age. Multiple cometary hits in different parts of the globe with ejecta all impacting Argentia. Interesting. More to this thread later I hope.