Fogonazos 2: September 2008

In 1994, while walking around a cement factory in southern Bolivia, Klaus Schütt discovered a limestone wall with a shear size of 25'000 square meters literally covered by dinosaur tracks. A few years later, in 1998, a scientific team lead by Swiss paleontologist Christian Meyer investigated the wall, and proved it was "the largest site of dinosaur tracks found so far".

The immense Bolivian site (Cal Orko) is the rock face of an outcropping on a slant of 73 degrees, 80 meters high and 1.2 km long. There are more than 5,000 tracks of 294 different dinosaurs made during the second half of the Cretaceous period.

There is such an impressive amount of tracks that some of the researchers said this place seemed to be a dinosaurs’ dancefloor.

Image: Jpspbj (Flickr)

According to dinosaurus.org, the tracklevel dates from the Late Cretaceous and forms part of the El Molino Formation, the estimated age is about 68 million years. More than 250 trackways have been registered and six different types of dinosaurs have been present. The most spectacular trackways are those of quadrupedal titanosaurs, herbivore animals with a size between 15 and 25m.

Image: Rikkiandmatt (Flickr)

Perhaps, the most special track is a 347 meters footpath, the longest dinosaur trackway ever known, made by a baby Tyrannosaurus rex nicknamed “Johnny Wallker” by researchers.

Image: Ryan Greenberg (Flickr)

During the Cretaceous, Cal Orko was part of an immense shallow lake. In the Tertiary, when the Andes Mountains were formed, the movement of the tectonic plates pushed the former lake bed vertically. Not far from this site, eight others have been found in recent years and are currently being studied.

Image: Ramón Arellano (Flickr)

According to Christian Meyer, the discovery is an enormous contribution to humanity and to science, revealing data heretofore unknown and "documenting the high diversity of dinosaurs better than any other site in the world".

To contribute to preserving the site, a Cretaceous Park is open since March 2006. In this park, replicas of different dinosaur species welcome visitors to a museum with audiovisual exhibits, transporting their minds to prehistoric time.

Image: Flyingtiti (Picasa)

Imagen: Ryan Greenberg (Flickr)

More info: 1, 2, 3

References: Las huellas de Cal Orcko (duiops.net) / Los saurios de Sucre (Artículo de la revista BDW, sept 2001) / Parque Cretácico (web oficial) / Cal Orko (Wikipedia)

Original post at Fogonazos.

Do you wanna Digg it?

No people, no animals, no movement. Spanish artist José Manuel Ballester (Madrid, 1960) cleared every living creatures from some of the most famous paintings from El Prado Museum. The result, a collection of disturbing desert landscapes, is now exhibited at a little gallery in Madrid.

Imagine, for example, The Garden of Earthly Delights (the famous triptych by Hieronymus Bosch) without any people. Or Fra Angelico's Annunciation with no Virgin and no angel on the scene. These are some of the ‘hacks’ at Ballester’s current exhibition Espacios Ocultos.

Annunciation, Fra Angelico (Before and after)

According to his official site, Ballester's work seeks to "purge all human anecdotes" from historical landscape painting and invert the hierarchy, giving priority to traditionally considered “background”.

Honestly, I don’t mind what the artist is seeking with his work. I just love those frightening landscapes!