Timeline for Where did the sand in the Sahara come from?
Current License: CC BY-SA 3.0
19 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 14, 2020 at 8:03 | history | protected | CommunityBot | ||
| Jan 6, 2020 at 19:10 | answer | added | Archibald Velicrates | timeline score: 2 | |
| Apr 27, 2019 at 20:03 | answer | added | Richard Morales | timeline score: -3 | |
| Dec 31, 2018 at 5:39 | vote | accept | BWhite | ||
| Jan 19, 2018 at 2:31 | answer | added | Keith McClary | timeline score: 2 | |
| Jan 18, 2018 at 6:49 | review | Suggested edits | |||
| Jan 18, 2018 at 8:11 | |||||
| Jan 14, 2018 at 21:32 | answer | added | bandybabboon | timeline score: 4 | |
| Jan 14, 2018 at 18:37 | answer | added | John | timeline score: 16 | |
| Apr 25, 2016 at 19:55 | answer | added | Gordon Stanger | timeline score: 7 | |
| Apr 24, 2016 at 3:34 | comment | added | userLTK | I saw on one of those nature TV shows (so take with a grain of salt), that the dust from the Sahara fertilizes South America, as it's carried on winds between the two continents. | |
| Apr 24, 2016 at 2:43 | comment | added | BWhite | My understanding is that organic matter that decomposes doesn't just disappear. It might be blown away in dry conditions like the Sahara. | |
| Apr 22, 2016 at 22:56 | comment | added | jamesqf | Many fertile soils contain a lot of sand, naturally. (For instance, the decomposed granite soils found in a lot of places around where I live.) It's mixed with organic matter (humus) and held together by plant roots. If the plants die from lack of water, the organic matter eventually decays and leaves just sand. | |
| Apr 22, 2016 at 22:00 | comment | added | BWhite | So, yes. It seems like a valid possibility that the silt in the topsoil blew away and left the sand. Places that were more clay are the ones that still remain intact. | |
| Apr 22, 2016 at 21:58 | comment | added | BWhite | @Siv This is complete hearsay, but in one case where there was silt originally, it was assumed to have blown away. In another case, it was assumed that it was the sand that blew because there was no clay mixed in. In retrospect, wind isn't going to be able to separate sand mixed into clay, so that seems less credible. | |
| Apr 22, 2016 at 21:54 | history | edited | hichris123♦ | CC BY-SA 3.0 |
Remove beginning bit - it's not relevant to the question
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| Apr 22, 2016 at 20:07 | comment | added | Siv | Perhaps the more relevant question is where the finer than sand weathering products have gone? | |
| Apr 22, 2016 at 19:49 | review | First posts | |||
| Apr 22, 2016 at 20:35 | |||||
| Apr 22, 2016 at 19:47 | comment | added | BWhite | I know that some parts of the Sahara are not covered with sand. That doesn't answer the question. | |
| Apr 22, 2016 at 19:46 | history | asked | BWhite | CC BY-SA 3.0 |