|
|
| |
|
| |
 |
| |
| |
|
|
| |
Sand
Volcanoes |
|
| |
|
|
| |
|
These
lumpy structures were once thought to be trace fossils made
by burrowing animals. A famous palaeontologist, Sir John William
Dawson, even gave them a fancy name: Astropolithon hindii (ASS-TRO-PO-LITH-ON
HIN-DI).
We now know that these lumps are made in wet sand. The water
pushes its way up through the sand and then explodes out - that's
why they're called sand "volcanoes." |
 |
| |
|
|
 |
| |
|
|
|
|
