ⓘ Kaibab Limestone
The Kaibab Limestone is a resistant cliff-forming, Permian geologic formation that crops out across the U.S. states of northern Arizona, southern Utah, east central Nevada and southeast California. It is also known as the Kaibab Formation in Arizona, Nevada, and Utah. The Kaibab Limestone forms the rim of the Grand Canyon. In the Big Maria Mountains, California, the Kaibab Limestone is highly metamorphosed and known as the Kaibab Marble.
The Kaibab Limestone was named by Darton in 1910 for the Kaibab Plateau, which is on the north side of Grand Canyon in Coconino County, Arizona. In his definition of the Kaibab Limestone formation, no type locality was designated. He also designated the Kaibab Limestone as the upper formation of the Aubrey Group, a now-abandoned stratigraphic unit. In 1921, Bassler and Reeside revised Dartons work and defined the Harrisburg Member of the Kaibab Limestone. In his 1938 monograph on the Toroweap Formation and Kaibab Limestone of northern Arizona, McKee split Dartons original Kaibab Limestone into the currently recognized Kaibab Limestone and Toroweap Formation. He also revised Kaibab Limestones lower contact and divided it into informal descending alpha, beta and gamma members. Later in the 1970s, its upper contact was revised and its aerial extent were defined. Also, unsuccessful attempts were made to raise the formation to group rank and divide it into several formations. In 1982, Warren Hamilton renamed it as the Kaibab Marble and determined its areal extent for California. In 1991, Sorauf and Billingsley subdivided the Kaibab Limestone into ascending Fossil Mountain Member new and Harrisburg Member. They designated the strata comprising McKees alpha or upper member as the Harrisburg Member and the strata comprising McKees beta or middle member as the Fossil Mountain Member. The Fossil Mountain Member was named for Fossil Mountain along the south rim near the Bass Trail. McKees gamma member is considered to be part of the Fossil Mountain Member. Later research has further redefined the regional extent of the Kaibab Limestone.
The Kaibab Limestone is an assemblage of sedimentary rock types. It consists of a complexity of inter fingering and inter bedded carbonate and siliciclastic sedimentary rocks. In addition, intense post-depositional diagenetic changes have created more composition variation by the alteration of limestone to dolomite and the silicification of limestone to form chert. In the western Grand Canyon region, the Fossil Mountain Member consists of fossiliferous and chert limestone with an abundant and diverse normal-marine fossil fauna. Further east in the Coconino Plateau region, the lithology, mineralogy, and fauna of the Fossil Mountain Member changes drastically where it grades laterally into sandy dolomite and dolomite that contains a restricted-marine fossil fauna and subordinate amounts of sandstone.The Harrisburg Member, which forms the uppermost cliffs and receding ledges along both north and south rims of the Grand Canyon, consists of an assemblage of gypsum, dolomite, sandstone, redbeds, chert, and minor limestone.
Within the Grand Canyon region, the Kaibab Limestone overlies gypsum and contorted sandstones of the Toroweap Formation. Originally, geologists interpreted the lower contact of the Kaibab Limestone to be an unconformity based on the presence of local intraformational breccias and erosional surfaces. However, additional research has concluded that these local intraformational breccias and erosional surfaces are the result of collapse following the dissolution of evaporite deposits within the upper part of the Toroweap Formation. As a result, this contact is inferred to be conformable or only locally a disconformity. South and east of the Grand Canyon, the evaporites and contorted sandstones sabkha deposits of Toroweap Formation interfinger with and are replaced by cross-bedded sandstones of the Coconino Sandstone. As a result, the Kaibab Limestone directly overlies the Coconino Sandstone in the Mogollon Rim region. The Kaibab Limestone directly overlies the White Rim Sandstone in northeastern Arizona and southeastern Utah.
The upper contact of the Kaibab Limestone Harrisburg Member with the overlying Moenkopi Formation is an erosional unconformity and disconformity. Within northwestern Arizona, southeastern Nevada, and southwestern Utah this contact is an erosional unconformity that in part consists of paleovalleys, as much as several hundred feet deep, and paleokarst that were eroded into the underlying Kaibab Limestone before the deposition of the Moenkopi Formation. These paleovalleys are often filled with conglomerates and breccias that are known as the Rock Canyon conglomerate. Within the Marble Canyon and eastern Grand Canyon regions and south into Verde Valley, upper contact of the Kaibab Limestone with the Moenkopi Formation is an erosional disconformity. This disconformity exhibits little relief and is identified by marked differences in color, topography, and rock types between tan, ledge-forming, calcareous sandstones and of the Kaibab Limestone and red, slope-forming siltstones of the Moenkopi formation. The unconformity and disconformity are inferred to represent most of Permian time including the Leonardian and part of Early Triassic time.
Although the Moenkopi Formation overlies the Kaibab Limestone, its redbeds have been removed almost entirely by erosion because they are less resistant to erosion than the strata of the Kaibab Formation. As a result, the Kaibab Limestone forms the surface of many of the vast plateaus that border the Grand Canyon. Within these plateaus, the uppermost beds of the Kaibab Limestone have also been largely removed by erosion.
The Kaibab Limestone contains the abundant fossils of Permian invertebrates and vertebrates. The invertebrate fossils found within the Kaibab Limestone include brachiopods, conodonts, corals, crinoids, echinoid spines, mollusks, hexactinellid and other sponges, trilobites, and burrows of callanassid shrimp. The fossil cephalopods found in the Kaibab Limestone include giant football-sized nautiloids. Fossil shark teeth, which represent a diverse assemblage of chondrichthyans, occur within the Kaibab Limestone of Arizona.
5. Depositional environments
The complex intercalation of carbonate and clastic sediments within the Kaibab Limestone reflects the deposition of sediments within a gently sloping continental margin during a period of frequent, high-frequency sea level changes. Relatively minor changes in sea level caused major lateral shifts in the position of supratidal, subtidal, and shallow-marine environments during the deposition of the Kaibab Limestone. The shifting sea levels and associated depositional environments created a complex interlayering of different types of carbonate and clastic sediments in the strata that comprise the Kaibab Limestone. The gently sloping continental margin on which the Kaibab Limestone accumulated, extended seaward from northern Arizona to southern Nevada, at times exceeding 200 miles 125 km in width. It is most likely that the high-frequency changes in sea level were caused by glacial sea level oscillations during this time period.
Early paleontological studies of the Kaibab Limestone firmly established its age on the basis of the abundant fossils that it and the underlying Toroweap Formation contain. On the basis of its brachiopod and siliceous sponge faunas, it was initially concluded that it is Leonardian approximately Kungurian / latest Early Permian in age. Later research concerning conodonts and associated megafossils obtained from western outcrops of the Fossil Mountain Member indicates that its age extends into the Roadian latest Early Permian and earliest Middle Permian age.
7. Geographic distribution
- Great Basin province*
- Black Mesa Basin*
- Plateau sedimentary province*
- Salton Basin*
- Basin and Range province*
- Paradox Basin*
Parklands incomplete list:
- Grand Canyon - See Geology of the Grand Canyon area
- Zion National Park - See Geology of the Zion and Kolob canyons area
- Grand Staircase-Escalante National Monument
- Capitol Reef National Park - See Geology of the Capitol Reef area
- Blue Diamond Mine on Blue Diamond Hill in Clark County, Nevada
8. Popular references
- Chronic, H., 1983, Roadside Geology of Arizona. 23rd printing. Mountain Press Publishing Company, Missoula Montana. 322 pp. ISBN 978-0-87842-147-3
- Lucchitta, I., 2001, Hiking Arizonas Geology. Mountaineerss Books, Seattle, Washington. 269 pp. ISBN 0-89886-730-4
- Blakey, R., and W. Ranney, 2008, Ancient Landscapes of the Colorado Plateau. Grand Canyon Association, Grand Canyon Village, Arizona. 176 pp. ISBN 978-1934656037
- Kaibab can mean: Kaibab Arizona, a small community in the United States Kaibab Indian Reservation Kaibab National Forest, Arizona Kaibab Limestone in
- thin, darker geologic unit, between the brighter colored units of the Kaibab Limestone above, and Coconino Sandstone below. It is a prominent unit in Grand
- a steep descent through the Grand Canyon s upper rock layers: the Kaibab Limestone and Toroweap Formation. At about 1 2 mile one can observe an excellent
- between stands of spruce, fir, and aspen. The soils, derived from Kaibab limestone are silty, clayey, or rocky. The plant tends to grow in drier spots
- Boyd Thacher State Park Kaibab Limestone Kakanui Kennetcook River Keyser Formation Kotelny Island Latyan Dam Lincolnshire limestone Llandovery Group Madar
- Indiana Limestone Bedford limestone Jeffersonville Limestone Kaibab Limestone Kasota limestone Keyser Limestone Keystone Madison Limestone Onondaga
- Formation Kaibab Limestone Toroweap Formation Coconino Sandstone Hermit Shale Supai Group Surprise Canyon Formation Redwall Limestone Temple Butte Limestone Muav
- James Hardie Gypsum Company. Gypsum is extracted from the Permian Kaibab Limestone formation. The gypsum layer is on the westward slope of Blue Diamond
- northwest Arizona are a red, limestone geographic feature, sets of cliffs along the western, eroded edge of the Kaibab Limestone the cliffs are about 135 - mi
- occurring in Navajo, Coconino, and Yavapai Counties. It grows on Kaibab Limestone in and around rocky cracks and crevices. In Oak Creek Canyon in the
- Marble Canyon. This plant is a resident of the Kaibab Limestone where it grows in cracks in the bare limestone The habitat is a pavement of dry, exposed
- Starting 260 million years ago, the yellowish - gray limestone of the fossil - rich Kaibab Limestone was laid down as a limy ooze in a tropical climate.
- Canyon, Kaibab Plateau, and the Coconino is geologic member no. 2 of the 4 units of Permian age unit 4, Kaibab Limestone makes up the Kaibab Plateau
- and cuts through the Permian Kaibab Limestone which exposes the Toroweap Formation and Coconino Sandstone. The Kaibab formation also forms the rim of
- which was a rarity on the porous Kaibab Limestone Known to some as the waterless mountain, in pioneer days the Kaibab was called the Buckskin Mountain
- of Dennison siding, the Kaibab Limestone that is predominant in the western part of the state first rises above the limestone Moenkopi Formation found
- 600 ft in the middle and then thins to 57 ft in the east. Either the Kaibab Limestone or Toroweap Formation overlies the Coconino Sandstone. The Coconino
- perimeter of the Colorado Plateau. The Hurricane Cliffs are made of Kaibab Limestone an erosion resistant, cliff - forming rock unit. The Uinkaret volcanic
- a dining, concessions and service facility. Constructed of native Kaibab limestone and timber, the complex was designed to harmonize with its rocky and
- Arizona. From the trail head, it makes a quick descent through the Kaibab Limestone and Toroweap Formation, making a couple of early switchbacks. Portions
- a geologic formation. This rock is covered in chips and gravel of Kaibab limestone forming the plant s substrate. It is not found in any other soil types
- Geology of the Pennsylvanian and Permian Cutler Group and Permian Kaibab Limestone in the Paradox Basin, Southeastern Utah and Southwestern Colorado
- located at the north of the Grand Canyon. The plateau is adjacent west of the Kaibab Plateau of the North Rim, with a basin containing the Kanab Creek watershed
- therefore youngest, formations seen in the Grand Canyon area is the Kaibab Limestone see 6d in figure 1 It erodes into ledgy cliffs that are 300 to 400
- of the Kaibab Plateau Walhalla Plateau The base of the mostly flat topped, Redwall Limestone monolith, sits upon cliffs of Muav Limestone then Bright
- gypsophile, mainly limited to the gypsum soils of the Kaibab Limestone it has also been seen on limestone soils. The gypsum is sought after and extensively
- the Kaibab Sea invaded the land and laid down a limey ooze that later lithified to form the locally up to 200 foot 60 m thick Kaibab Limestone This
- station a major contact point for visitors to Kaibab National Forest until the construction of the Kaibab Plateau Visitor Center. The ranger station comprises
- Butte Fault is the East Kaibab Monocline. The Butte Fault sections are north - south trending, and are part of the uplift of the Kaibab Plateau. Desert View
- spectacular portions are characterized by high cliffs of limestone and sandstone, namely the Kaibab Limestone and Coconino Sandstone cliffs. The escarpment was
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