gcsescience.com 10 gcsescience.com
Sedimentary Rocks - Formation.
Compaction eventually forces the water out of the sediment.
Salts in the water crystallise under pressure
and cement the sediment particles together (like glue).
Sedimentary rock is
often formed in layers,
because the original sediment is
laid down in layers.
This gives the rock a typical layered structure,
which can be seen in mudstone, and
more clearly in shale.
Sedimentary rocks are
often of a similar appearance
to the sediments which formed them
(sandstone looks like sand!).
Headings
Sedimentary Rocks
Search
Questions 
gcsescience.com Contents The Periodic Table Index Quizzes gcsescience.com
Copyright © 2008 Dr. Colin France. All Rights Reserved.