   |
|
|
|||||
| quartz vein | |||||
| the bicycle path cuts across a number of quartz veins; these were formed by the hardening of a silca-rich fluid, forced along a crack by pressure from deep within the earth and now appearing on the surface as the result of earth movements and erosions | |||||
| Simpson's Gap Bicycle Path - 13th May 2006 | |||||
|
|||||
|
|||||