This marl (a fine-grained calcareous
mudstone) contains interesting structures.
- Each structure is a cube
with hollow faces.
- These cubes are now made
of sediment. They are pseudomorphs replacing crystals
of a soluble mineral.
- This mineral was halite.
What is the chemical composition of halite, and what does its presence
tell us about the conditions when this rock was formed?
is in cm and mm
Grid reference: 914
This page is maintained by Roger Suthren
18 November, 2008