Green Bridge of Wales, England Located in the Pembrokeshire Coast National Park, the carboniferous limestone rock formation is about 80 feet (24 meters) high and 66 feet (20 meters) in length.

Hidden in the dense greenery of southern Tongatapu, a limestone monolith named Maka Lahi—meaning “Big Rock” in Tongan—has ...

When these remains cement together, they form enormous blocks of limestone. Karst formations like this one in Guizhou Province, China, are formed by the wearing away of carbonate rocks—mainly ...

Midway along Ireland’s Atlantic Coast lies the Burren, an otherworldly landscape whose mesmerising limestone formations have ... it’s a place where the rock wanders in beguiling patterns ...

Metamorphic rock is formed when existing rock is transformed under high heat and pressure, which generally destroys any fossils that were in the rock before it was metamorphosed. For example, marble ...

These rocks, formed millions of years ago due to seismic ... reflect vibrant turquoise hues due to the glacial silt in the water. Originally limestone, the rock underwent metamorphosis ...

The multiple limestone rock formations that began to be deposited 23 million years ago, during a time when the entire area was submerged under the ocean and abounded with rich marine life.