Chalk, a white, soft limestone, was formed aeons ago when the shells of tiny marine creatures were compressed on the sea floor. Jordanian workers put coloured chalk ...

Artist and University of Kansas graduate Megh Knappenberger created six paintings of the university’s mascot, the Jayhawk, even incorporating rock chalk (limestone) in it. She was able to get ...

The Alamo was built by Spanish settlers in the mid-1700s using Austin Chalk limestone from a quarry near present day Brackenridge Park. The Austin Chalk is known for its oil reserves in South Texas, ...

Chemical engineer Salah Aloqbi remembers sitting on a bus in Amman in 1995 when he hit on the idea that would lead him to create his company. More than two decades later it boasts 150 staff, with ...

The Jetmore Chalk Member of the Greenhorn Limestone is a Late Cretaceous rock unit deposited under the Western Interior Seaway in North America. We here report an assemblage of vertebrate fossils ...