31 May 2013
Peña de Bernal: Now Officially the World’s Tallest Rock
About 8.7 million years ago in what is north central Mexico, a pair of tectonic plates converged. One was forced under the other and sank in to the mantle of the Earth. The resulting volcanic activity formed a dacite rock which, after hardening, eventually forced itself through as a solid plug to the surface. This subduction zone activity created Peña de Bernal which has, you could say, weathered the passing time remarkably well. It has recently been declared the tallest monolith on Earth.
It has taken an age of argument for the monolith, in the Mexican state of Querétaro, to finally acquire this status. For many years scientists have that the Rock of Gibralta and South Africa’s Sugarloaf Mountain were both larger than the Mexican monolith. However, the journal Geosphere has finally settled the competition and declared that Peña de Bernal is indeed the world’s tallest free standing rock.
It has taken an age of argument for the monolith, in the Mexican state of Querétaro, to finally acquire this status. For many years scientists have that the Rock of Gibralta and South Africa’s Sugarloaf Mountain were both larger than the Mexican monolith. However, the journal Geosphere has finally settled the competition and declared that Peña de Bernal is indeed the world’s tallest free standing rock.