CANADA - Dinosaur Provincial Park

Postal enviada por Tina (ButtonsansTins) a cambio de una UNESCO de España.

Envío - 23 de Marzo del 2016.

INSCRIPTION/INSCRITO: 1980

Seventy-five million years ago, what is now eastern Alberta was a low-lying coastal plain at the edge of a large shallow sea. The climate was subtropical, similar to northern Florida today. Countless creatures flourished there - fish, amphibians, reptiles, birds, primitive mammals and about 35 species of dinosaur. When some of these animals died, they lay in river channels and mud flats so their bones were buried in new layers of sand and mud. Over time, a combination of pressure, lack of oxygen and deposition of minerals produced fossils - impressions of the bones, teeth and skin of those creatures that once roamed ancient Alberta. Over more time, new layers of sediments covered the fossils and preserved them.

And so it was until the end of the latest Ice Age, 13,000 years ago, a mere wink in geological time, when glacial ice scraped off the upper layers of rock. Huge volumes of meltwater carved deep into the soft sandstone and mudstone strata, exposing the fossil-bearing sediments and, in the process, creating the Red Deer River Valley. Its haunting hoodoos, isolated mesas and low-lying coulees are at the heart of Alberta’s badlands and contain the greatest concentration of Late Cretaceous dinosaur fossils yet found on Earth.
-https://www.pc.gc.ca/en/culture/spm-whs/sites-canada/sec02c

Unesco con sello Unesco,

Thanks for the card and the stamps Tina!