Timeline for What resources (especially mineral) can you find on terrestrial planets but not asteroids?
Current License: CC BY-SA 4.0
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| Jun 29, 2020 at 12:38 | history | edited | John | CC BY-SA 4.0 |
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| Jun 29, 2020 at 12:22 | comment | added | John | guano actually gets compressed into a solid plastic like consistency almost like amber as it ages. We used to use a sample of it as a brain teaser for mineralogy students. | |
| Jun 29, 2020 at 0:56 | comment | added | RonJohn | I'm not sure that guano is a mineral (maybe after a few millennia of compression it would petrify into something like coprolite), but otherwise good examples. | |
| Jun 28, 2020 at 13:25 | history | answered | John | CC BY-SA 4.0 |