![File:Chalk (Smoky Hill Chalk Member, Niobrara Formation, Upper Cretaceous; Castle Rock, south of Quinter, Kansas, USA) 20 (39122808902).jpg - Wikimedia Commons File:Chalk (Smoky Hill Chalk Member, Niobrara Formation, Upper Cretaceous; Castle Rock, south of Quinter, Kansas, USA) 20 (39122808902).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/c/c6/Chalk_%28Smoky_Hill_Chalk_Member%2C_Niobrara_Formation%2C_Upper_Cretaceous%3B_Castle_Rock%2C_south_of_Quinter%2C_Kansas%2C_USA%29_20_%2839122808902%29.jpg)
File:Chalk (Smoky Hill Chalk Member, Niobrara Formation, Upper Cretaceous; Castle Rock, south of Quinter, Kansas, USA) 20 (39122808902).jpg - Wikimedia Commons
![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. 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.](https://i.redd.it/u3k53twulwq11.jpg)
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.
![Ideal Location Over Selma Chalk Formation - Arrowhead Environmental Partners: A Premier Waste Disposal Facility Ideal Location Over Selma Chalk Formation - Arrowhead Environmental Partners: A Premier Waste Disposal Facility](http://arrowheadenvironmentalpartners.com/wp-content/uploads/2018/11/Arrowhead-Landfill-illustration.jpg)
Ideal Location Over Selma Chalk Formation - Arrowhead Environmental Partners: A Premier Waste Disposal Facility
![New Pit Chalk Formation, Kensworth Quarry, Dunstable, showing conjugate... | Download Scientific Diagram New Pit Chalk Formation, Kensworth Quarry, Dunstable, showing conjugate... | Download Scientific Diagram](https://www.researchgate.net/publication/370106623/figure/fig3/AS:11431281150522866@1681899322067/New-Pit-Chalk-Formation-Kensworth-Quarry-Dunstable-showing-conjugate-fracture-system.png)