Chalk badlands (Niobrara Formation, Upper Cretaceous; chal… | Flickr
File:Chalk & impure chalk (Smoky Hill Chalk Member, Niobrara Formation, Upper Cretaceous; Monument Rocks, Kansas, USA) 49.jpg - Wikimedia Commons
Chalk formation mushroom valley white hi-res stock photography and images - Alamy
Chalk Rock Type, Composition, Formation, Occurrence & Uses
DISCOVERING FOSSILS | What is chalk and how does it form?
KGS--Smoky Hill Chalk Member, Niobrara Chalk--Deposition
A chalk revolution: what have we done to the Chalk of England? - ScienceDirect
Niobrara Formation - Wikipedia
Monument Rocks, the Chalk Pyramids - Kansas
Geological Society - Chalk cliffs, Sussex
Chalk Group - Wikipedia
A chalk revolution: what have we done to the Chalk of England? - ScienceDirect
This unbelievable beautiful chalk wall was uplifted was formed in the Late Cretaceous epoch, between 66 and 100 million years ago, when the area was under the sea. Beachy Head, England. p.s.
Chalk - Wikipedia
Chalk: A biological limestone formed from shell debris
Chalk (Smoky Hill Chalk Member, Niobrara Formation, Upper … | Flickr
Chalk | GeoKansas
File:Chalk & impure chalk (Smoky Hill Chalk Member, Niobrara Formation, Upper Cretaceous; Monument Rocks, Kansas, USA) 82.jpg - Wikimedia Commons
Chalk: A biological limestone formed from shell debris
Prairie Bluff Chalk - Wikipedia
File:Chalk formation 2.jpg - Wikimedia Commons
Chalk Facts for Kids
Chalk – Geology is the Way
GeoLog | Imaggeo on Mondays: The Chalk Cliffs of Étretat
Rock of ages: how chalk made England | Geology | The Guardian
Austin Chalk Getting Another Look
