page_title: Blue Mesa Member
hierarchical_section_title: Blue Mesa Member
caption_attribution_description: English: The Tepees in Petrified Forest National Park in northeastern Arizona, United States. View is toward the northwest from the main park road. According to a National Park Service (NPS) document, rock strata exposed in the Tepees area of the park belong to the Blue Mesa Member of the Chinle Formation and are about 220 to 225 million years old. The colorful bands of mudstone and sandstone were laid down during the Triassic, when the area was part of a huge tropical floodplain. Français&#160;: Les Tepees (trad. «&#160;Tipis&#160;»), vus en regardant vers le nord-ouest depuis la route principale du Parc national de Petrified Forest, dans le nord-ouest de l'Arizona (États-Unis). Les roches exposées appartiennent à la formation de Chinle, datant du trias tardif (200-225 Ma). Ces bandes colorées de grès et de mudstone se sont formées lorsque la zone était une vaste plaine d'inondation.
context_page_description: The Blue Mesa Member is a geologic formation of the Chinle Group. It is located in the Petrified Forest National Park of northeast Arizona.
context_section_description: The Blue Mesa Member is a geologic formation of the Chinle Group. It is located in the Petrified Forest National Park of northeast Arizona.
caption: The Tepees, Petrified Forest National Park
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