Global Information Lookup Global Information

Toroweap Formation information


Toroweap Formation
Stratigraphic range:
Early Permian,
272–270 Ma
PreꞒ
O
S
D
C
P
T
J
K
Pg
N
Toroweap formation in Grand Canyon National Park
TypeGeological formation
UnderliesKaibab Limestone-(Permian), Grand Canyon, North Rim, (Kaibab Plateau),
also South Rim,
and elsewhere in Arizona, Utah, Nevada
OverliesCoconino Sandstone
Thickness200 feet (61 m) approximate maximum
Lithology
Primarygypsum & shale,[1] also sandstone
Location
Region(southwest)-Colorado Plateau
Northern Arizona, southeast Utah
ExtentGrand Canyon, North & South Rims, northeast Arizona, southeast Utah

The Middle Permian Toroweap Formation is a 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 Canyon, Arizona, USA, found through sections of the South Rim, Grand Canyon, and the North Rim, of the Kaibab Plateau; also the Kaibab's southeast extension to Cape Royal, the Walhalla Plateau. The Colorado River of the Grand Canyon makes its excursion from due-south to due-west around the Walhalla Plateau, as it enters the east end of the Grand Canyon's interior, Granite Gorge. The formation is also found in southeast Utah.

The Toroweap Formation is a darker unit of gypsum and shale;[1] also sandstone. In photos the cliff-forming Kaibab and Coconino units, show the more erodable Toroweap Formation slope-forming accumulations upon the underlying Coconino Sandstone; likewise below the Coconino, the softer Hermit Formation is shown forming slopes, above the slope forming 'redbeds' of the Supai Group. Close-up views of the Toroweap will show the resistant sandstone sub-units as erosion resistant sections.

Cliffs of the Toroweap Formation can be found in Walnut Canyon National Monument, about 70 mi[2] southeast of the Grand Canyon, and east of Flagstaff, Arizona.

Marine transgression, and continental wind-blown sand, laid down the three units of Kaibab, Toroweap, and Coconino. The oceanic sea came from the west, and receded and re-transgressed. The Coconino Sandstone being made of sand dunes, continental, means that near-shore Toroweap deposits, and off-shore Kaibab Limestone, can all have the same actual ages in different regions where they were deposited, (continental, near-shore, open sea). In Arizona, the Toroweap formation is found in two transgressions eastwards,[3] with easternmost 'strand-lines' locating the shoreline, Toroweap west, and Coconino sand dunes or beach deposits, east.

  1. ^ a b Lucchitta, 2001. Hiking Arizona's Geology, "Hike 3: Tanner Trail", pp. 78–82, p. 78.
  2. ^ Arizona Road & Recreation Atlas, Benchmark Maps, pp. 28–29, 62–63.
  3. ^ Chronic, 1983. Roadside Geology of Arizona, Kaibab-Toroweap-Coconino, 2 wedge-(trangressions) graphic (unnumbered, untitled): In mid-Permian time, a desert of windblown sand swept northern Arizona, creating the Coconino Sandstone (1). Then shallow Kaibab and Toroweap seas advanced from the west, each depositing a wedge of marine limestone bordered with nearshore sandstone, siltstone, and gypsum (2). Desert conditions still prevailed on the shores, so dune sandstone there is of the same age as the marine limestones and nearshore deposits., p. 207.

and 26 Related for: Toroweap Formation information

Request time (Page generated in 0.8122 seconds.)

Toroweap Formation

Last Update:

The Middle Permian Toroweap Formation is a thin, darker geologic unit, between the brighter colored units of the Kaibab Limestone above, and Coconino Sandstone...

Word Count : 798

Kaibab Limestone

Last Update:

Harrisburg Member of the Kaibab Limestone. In his 1938 monograph on the Toroweap Formation and Kaibab Limestone of northern Arizona, McKee split Darton's original...

Word Count : 1841

Atoko Point

Last Update:

Road. The cliff of Atoko Point is composed of Kaibab Limestone, upon Toroweap Formation, on white cliffs of Coconino Sandstone. Below is soft erodible, dk-burnt...

Word Count : 203

Coconino Sandstone

Last Update:

thins to 57 feet (17 m) in the east. Either the Kaibab Limestone or Toroweap Formation overlies the Coconino Sandstone. The Coconino Sandstone is typically...

Word Count : 490

Toroweap Fault

Last Update:

Chino Point Seligman Prospect Point Audley Tower of Babylon (5472 ft) Toroweap Point/Tuweep (6293 ft)    150km 100miles Parawan, UT Twin Butte, AZ Black...

Word Count : 992

Oak Creek Canyon

Last Update:

the Kaibab Limestone, (the geologic formation found at the top of the Grand Canyon), and the Toroweap Formation are found only at the northern end of...

Word Count : 1020

Geology of the Zion and Kolob canyons area

Last Update:

rock) to form the Toroweap Formation, now exposed in the Grand Canyon to the south but not in the Zion and Kolob area. This formation is not exposed in...

Word Count : 4494

Meteor Crater

Last Update:

the rim Toroweap Formation (limestone formed 255 million years ago) Kaibab Formation (dolostone formed 250 million years ago) Moenkopi Formation (mudstone...

Word Count : 4307

Mather Point

Last Update:

broken into large blocks. Mather Point is also composed of Kaibab upon Toroweap Formation slopes, upon white cliffs of Coconino Sandstone. Aerial view, & 7...

Word Count : 281

Grand Staircase

Last Update:

Formation Moenkopi Formation Kaibab Limestone Toroweap Formation Coconino Sandstone Hermit Shale Supai Group Surprise Canyon Formation Redwall Limestone...

Word Count : 725

White Rim Sandstone

Last Update:

formation deposited at the time of marine transgressions during the Early to Middle Permian Period. Toroweap Formation The coeval Toroweap Formation was...

Word Count : 514

Geology of the Grand Canyon area

Last Update:

unconformity marks the top of this formation. Next in the geologic column is the 200-foot (60 m)-thick Toroweap Formation (see 6c in figure 1). It consists...

Word Count : 6809

Topaz Canyon

Last Update:

The upper cliffs of the canyon are rock units of Kaibab Limestone, Toroweap Formation, Coconino Sandstone, and Hermit Shale, down to Supai Group on red-cliffs...

Word Count : 667

Hermit Formation

Last Update:

of Toroweap and Shivwits Plateaus. In the Sedona, Arizona area, it averages 300 feet (91 m) in thickness. The upper contact of the Hermit Formation is...

Word Count : 367

Walnut Canyon National Monument

Last Update:

Permian Kaibab Limestone, which exposes the Toroweap Formation and Coconino Sandstone. The Kaibab formation also forms the rim of the Grand Canyon. Crossbedding...

Word Count : 1272

South Kaibab Trail

Last Update:

through the Grand Canyon's upper rock layers: the Kaibab Limestone and Toroweap Formation. At about 1/2 mile one can observe an excellent example of a pustule...

Word Count : 1039

Kayenta Formation

Last Update:

The Kayenta Formation is a geological formation in the Glen Canyon Group that is spread across the Colorado Plateau province of the United States, including...

Word Count : 3780

Fishtail Mesa

Last Update:

the mostly slope-forming Toroweap Formation. Notably, below the Coconino are the slopes of dark-burnt-red Hermit Formation (Hermit Shale), as thick as...

Word Count : 497

List of national monuments of the United States

Last Update:

and cuts through the Permian Kaibab Limestone, which exposes the Toroweap Formation and Coconino Sandstone. Wupatki Arizona 35°31′N 111°22′W / 35.52°N...

Word Count : 3779

Marble Canyon

Last Update:

walls of Marble Canyon are composed of Kaibab Limestone upon the Toroweap Formation upon Coconino Sandstone. Marble Canyon is the only home of the endangered...

Word Count : 399

Moenave Formation

Last Update:

The Moenave Formation is a Mesozoic geologic formation, in the Glen Canyon Group. It is found in Utah and Arizona. The Moenave was deposited on an erosion...

Word Count : 831

Aztec Sandstone

Last Update:

Early Jurassic geological formation of primarily eolian sand from which fossil pterosaur tracks have been recovered. The formation is exposed in the Mojave...

Word Count : 502

Cutler Formation

Last Update:

The Cutler Formation or Cutler Group is a rock unit that is exposed across the U.S. states of Arizona, northwest New Mexico, southeast Utah and southwest...

Word Count : 1631

Redwall Limestone

Last Update:

is an erosion-resistant, Mississippian age, cliff-forming geological formation that forms prominent, red-stained cliffs in the Grand Canyon. these cliffs...

Word Count : 2423

Moenkopi Formation

Last Update:

The Moenkopi Formation is a geological formation that is spread across the U.S. states of New Mexico, northern Arizona, Nevada, southeastern California...

Word Count : 1954

Sultan Formation

Last Update:

The Sultan Formation is a geologic formation in Nevada. It preserves fossils dating back to the Devonian period. Earth sciences portal United States portal...

Word Count : 58

PDF Search Engine © AllGlobal.net