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Journey to the Grand Canyon; a geologic and hydrologic excursion across Arizona's magnificent heartland

Wayne Ranney and Marvin Glotfelty
Journey to the Grand Canyon; a geologic and hydrologic excursion across Arizona's magnificent heartland (in Geologic excursions in southwestern North America, Philip A. Pearthree (editor))
Field Guide (Geological Society of America) (September 2019) 55: 147-168


The Grand Canyon is perhaps our planet's most widely recognized and single most important geologic landform. The goals for this trip are to give participants an understanding of the canyon's formation and its dynamic hydrologic system. While our destination is clear, the journey will also provide opportunities to discuss Arizona's larger geologic setting within the Basin and Range, Transition Zone, and Colorado Plateau physiographic provinces. Stops and discussions will include: (1) geologic setting and groundwater environment of the Phoenix basin; (2) Cenozoic landscape development of the Transition Zone; (3) Montezuma Well, a unique arid-land spring contained within a travertine mound; (4) ascent of the Mogollon Rim, the state's second largest landform and entryway to the Colorado Plateau; (5) the San Francisco Volcanic Field and surrounding volcanic features, including Sunset Crater, a late Holocene scoria cone; and (6) multiple stops in Grand Canyon National Park to discuss its varied geology. The principal focus here will be on evolving concepts of the canyon's formation since the time of John Wesley Powell, including the flurry of research results proffered in the past 20 years. Participants will walk the Trail of Time, Earth's largest man-made geologic exhibit at over 2 km. Another equally important discussion will cover the modern hydrologic system of the canyon, which yields a tenuous supply of potable water from a single inner-canyon spring for over six million annual visitors and 2,500 full-time residents. The National Park Service has prioritized the replacement of the Trans-Canyon Waterline due to climate change concerns.

ISSN: 2333-0937
EISSN: 2333-0945
Serial Title: Field Guide (Geological Society of America)
Serial Volume: 55
Title: Journey to the Grand Canyon; a geologic and hydrologic excursion across Arizona's magnificent heartland
Title: Geologic excursions in southwestern North America
Author(s): Ranney, WayneGlotfelty, Marvin
Author(s): Pearthree, Philip A.editor
Affiliation: Clear Creek Associates, Scottsdale, AZ, United States
Affiliation: University of Arizona, Arizona Geological Survey, Tucson, AZ, United States
Pages: 147-168
Published: 20190904
Text Language: English
Publisher: Geological Society of America, Boulder, CO, United States
References: 39
Accession Number: 2020-016665
Categories: Areal geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. strat. cols., geol. sketch maps, sects.
N34°00'00" - N36°00'00", W113°00'00" - W110°00'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2020, American Geosciences Institute.
Update Code: 202011
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