The basalt which makes up the Giant’s causeway is an igneous rock. Sedimentary rocks are formed by small rock pieces which are transported by rivers and laid down in layers. Chalk is a ...

It's been a dream of mine for a long while to find Pudding Stones! Pudding stones are a type of sedimentary rock known as conglomerate. These Pudding Stones are conglomerates that have been ...

Dense, dark, compact—at first glance, the sedimentary rock samples that Dr. Amirsaman Rezaeyan has on his lab desk are only ...

Dramatic cliffs, panoramas and suggestive rock formations are the reward for hikers in Danxia Shan, an easy weekend getaway from Hong Kong.

They accidentally discovered a band of sedimentary rock that contained unusually high levels of a rare element, iridium. Chemical dating techniques put the rock at around 65 million years old.