Ask a Scientist: Not all rocks are hard
Geography Site: Coasts - Cliffs
Is chalk a rock? - Quora
Rock Types
Chalk - Wikipedia
Day 4: Types of earth materials - Mrs. Black's Classroom News
Chalk: A biological limestone formed from shell debris
Chalk – Geology is the Way
Chalk: A biological limestone formed from shell debris
Landforms of Erosion | A Level Geography
Geography Site: Coasts - Cliffs
Chalk - Wikipedia
Rock of ages: how chalk made England | Geology | The Guardian
Chalk is a soft, friable and porous variety of limestone. Chalk is composed of calcareous tests of marine microo… | Rock types, Rocks and minerals, Rock and pebbles
Chalk Group - Wikipedia
What landforms are created by coastal erosion?. Headlands and Bays Headlands are formed when the sea attacks a section of coast with alternating bands. - ppt download
Chalk - Wikipedia
Chalk | rock | Britannica
Coastal Change and Conflict - ppt video online download
DISCOVERING FOSSILS | What is chalk and how does it form?
Chalk | Properties, Composition, Formation and Uses
Bays and Headlands - Internet Geography
Chalk - OpenLearn - Open University
Relief - British Geological Survey
