Arche naturelle dans le Parc National de Bryce Canyon, scène d'hiver, avec des arbres de pin ponderosa montrant à travers le trou dans l'arche, la neige
4256 x 2832 px | 36 x 24 cm | 14,2 x 9,4 inches | 300dpi
Date de la prise de vue:
16 février 2016
Lieu:
Bryce Canyon National Park, Utah USA
Informations supplémentaires:
Though the name tends to be misleading, Natural Bridge is one of several natural arches in Bryce Canyon and creates a beautiful scene at this viewpoint. This arch, sculpted from some of the reddest rock of the Claron Formation (rich in iron oxide minerals), poses a stark contrast to the dark green of the Ponderosa forest that peeks through the arch from the canyon below. Bridges form through the erosion of rock by streams or rivers. This window or arch formed from a combination of processes. Frost wedging, the expanding of cracks in rock as water turns to ice, weakened the rock. Dissolution, the chemical dissolving of rock by rainwater, chewed away at the top and sides of this wall of rock. Finally gravity pulled loose the weakened pockets of rock at the center creating the hole you see. Thus, Bryce Canyon's 'bridges', including Natural Bridge, are spectacular examples of arches that, like the hoodoos, are constantly at risk of destruction as the forces of erosion continue to wear the rock away.
