Below the Chalk lies the Greensand on which the River Frome and the River Hooke both flow. The mineral glauconite is much in evidence and its colour gives the material its name (from the Greek glaukos meaning blue-green or blue-grey).
There are two layers to the Greensand the hard uppermost layer which can be seen on the north and west sides of the car park. It is a well cemented pebbly layer.
The Lower Chalk is the same material but now it is uncemented and has been used as a sand component of cement. Certain layers are full of a small fossil oyster called amphidonte, formerly called Exogyra. The Lower Chalk (Cenomanian) is crowded with phosphatic fossils in good preservation although fragmentary. The fossils present include bivalves, brachiopods, echinoids and ammonites. The ammonites are of diverse form prior to their extinction, e.g. Schloenbachi
To log this Earthcache: Go to the published Co-ords and answer the following questions and send your answers to me through email/messaging in my profile, please feel free to log before you Recieve a reply :
Question 1. At the listed co-ordinates Describe the appearance of the two layers and give the reasons for your answers.
Question 2. Estimate the height/thickness of each layer.
Question 3. Describe the difference between the North Face and the West Face?
Question 4. What is the Geological Time of the Lower Chalk called and how old is it?
Please post a photo of you at GZ (optional)
Optional: Younger cachers may like to also answer these optional questions. Q5. What is a fossil?
Q6. Can you add a photo of one you have found?"
CONGRATULATIONS TO wjp666 Although you can not technically get FTF on an earthcache, you were first to visit the GZ and log the cache, so feel free to claim it as FTF!