Very special stones in London
These Stones you have here before yourselves are in London something quite exotic. Around here there is a lot of Portland limestone to see. Its age can be determined, relatively easily, by the inclusions . However, in the stones which lie here there are no such inclusions. Hence, it was very difficult and has taken a long time to determine the age.
This freshwater stone originated from Calciumcarbonat of resigning waters of hard springs. To waters was taken away by water plants CO2 by which lime was precipitated and deposited in layers. Lime surrounded the plants which died. This led to the fact that numerous pores originated in this rock. Haematite was stored and the red pigmentation typical for this natural stone originated. Periodical lime depositions caused the clearly recognizable pattern of this natural Stone
To log this cache, you will need to complete the tasks below; You can use information from the cache page and your observations at the Stones, to do this. Please email us with the info (rather than post it on your log); Our email address is on our profile page.; You can log a find once we have been sent an email; there is no need to wait for a reply. We may delete your log if your answer is way off the mark.
1. Does the surface of the stones describe to me, is it smooth or rough ?
2. Do you believe this always was in such a way , or were the stones worked on?
3. Which colour is to be found most often in the deposition layers, is it red/orange or green ?
4. Look a little more exactly the big stone: how high do you estimate his thickest layer? More than 2 inch?
5. Are the " holes " in the stones caused by fossils or erosion ?
6. As an optional extra, post a picture of yourself and / or your GPSr next to the Stones?
Have fun in the consideration of these special stones