Le Grand Canyon Blacktail en discordance. Grès Tapeats cambrien protérozoïque précoce Vishnu reposant sur le schiste.

• Contributeur: Earth Gallery Photography / Alamy Banque D'Images
• ID de l’image: HD6JE9
• Taille du fichier: 28,7 MB (1,8 MB Téléchargement compressé)
• Autorisations: Modèle - non | Propriété - non
• Dimensions: 3872 x 2592 px | 32,8 x 21,9 cm | 12,9 x 8,6 inches | 300dpi
• Date de la prise de vue: juillet 2015
• Lieu: Blacktail Canyon, Grand Canyon National Park, Arizona, USA.

Informations supplémentaires

Exposed in Blacktail Canyon, a side canyon joining the Grand Canyon of Arizona at (Colorado) river mile 120, the Great Unconformity represents approximately 1.2 billion years of missing geologic history. The horizontally bedded early Cambrian Tapeats Sandstone, age of approximately 525 million years, is resting directly on vertically foliated early Proterozioc Vishnu Schist, age of approximately 1.75 billion years. The thin contact between the two rock types represents a vast period of time when sediments were not deposited or were later removed through erosion.

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• contacter
• erosuion
• geology
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• nonconformity
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• schist
• tapeats grès
• unconformity
• vishnu