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Coyote Wash deposit, Navajo Co., Arizona, USAi
Regional Level Types
Coyote Wash depositWash
Navajo Co.County

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Latitude & Longitude (WGS84):
35° 13' 47'' North , 110° 40' 42'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
West Winslow150 (2006)21.8km
Winslow9,600 (2017)22.9km
LeChee1,443 (2011)23.0km
Winslow West438 (2011)23.0km
Tolani Lake280 (2011)27.3km

A bentonite occurrence located in the SE¼ sec. 7 & in secs. 8 & 18, T21N, R16E, G&SRM, 22.9 km (14.2 miles) N of Winslow.

Mineralization is bentonite clay hosted in Late Triassic clay and mud of the Chinle Formation and clastic sedimentary rock. Local rocks include rocks of the Chinle Formation.

Regions containing this locality

North America PlateTectonic Plate
Colorado Plateau, USAPlateau
Navajo Nation Indian Reservation, USAReservation
Hopi-Navajo Indian Reservations, Colorado Plateau, Apache; Navajo and San Juan Cos., Arizona & Utah, USA

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Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.

No minerals currently recorded for this locality.

List of minerals for each chemical element

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on

0 - 0.0117 Ma

ID: 3371071
Stream-channel deposits

Age: Anthropocene (0 - 0.0117 Ma)

Description: White to light-red and gray, interbedded silt, sand, and clay, mixed with gravel, pebbles, and cobbles; poorly sorted. Pebbles and cobbles dominantly are angular to rounded, red, white, gray, and black chert clasts; subrounded to rounded red sandstone clasts; and angular to subrounded mafic monchiquite and basanite clasts in Hopi Buttes area. Deposits intertongue with, overlap, or are inset against adjacent surficial deposits (Qa1, Qa2, Qa3, Qv, Qg1, Qg2, QTdi), and they overlap or erode into flood-plain deposits (Qf, Qf1, Qf2, Qf3), ponded sediments (Qps), and mixed alluvium and eolian deposits (Qae). Stream channels subject to high-energy flows and flash-flood debris flows. Little or no vegetation in stream channels except for salt cedar (tamarisk), russian olive, and cottonwood trees along Little Colorado River and several large washes. Contacts with other alluvial deposits are gradational and approximate. Stream-channel deposits of Little Colorado River are mapped as shown on 1:24,000-scale color aerial photographs flown in 2005 (Block and others, 2009). Channel of Little Colorado River meanders within its floodplain valley between Winslow and Leupp. Downstream (northwest) of Leupp, Little Colorado River channel is confined within narrow bedrock strata of the Moenkopi and Kaibab Formations. Thickness, 2 to 9 m (6 to 30 ft)

Lithology: Alluvium

Reference: Billingsley, G.H., D. Block, and M. Hiza Redsteer. Geologic map of the Winslow 30’ × 60’ quadrangle, Coconino and Navajo Counties, northern Arizona. U.S. Geological Survey Scientific Investigations Map 3247. [200]

Early Jurassic - Late Triassic
174.1 - 237 Ma

ID: 3185972
Mesozoic sedimentary rocks

Age: Mesozoic (174.1 - 237 Ma)

Lithology: Sandstone-conglomerate

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Norian - Carnian
208.5 - 237 Ma

ID: 2719040
Chinle Formation

Age: Late Triassic (208.5 - 237 Ma)

Stratigraphic Name: Chinle Formation

Description: Colorful mudstone, such as in the Painted Desert, and less abundant lenses of sandstone and conglomerate, deposited by a large river system. This unit typically is eroded into badlands topography and contains clays that are prone to shrinking and swelling. (210-230 Ma)

Comments: Original map source: Arizona Geological Survey, DI-8 Geologic Map of Arizona, Digital Spatial data for the Geologic Map of Arizona, v. 3.0, edited by S.M. Richard and S.M. Kneale, 2002, 10 p., 2 DOS HD disks. Arc/INFO export file (.e00) format, scale 1:1,000,000.

Lithology: Major:{mudstone}, Minor:{sandstone,conglomerate}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License


Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Kiersch, G.A. (1955), Mineral resources Navajo-Hopi Indian reservations, Arizona-Utah, Vol. II, University of Arizona: 25.
Phillips, K.A. (1987), Arizona Industrial Minerals, 2nd. Edition, Arizona Department of Mines & Minerals Mineral Report 4, 185 pp.: 46.
Peirce, H. Wesley (1990), Arizona Geological Survey Industrial Minerals card file.
U.S. Bureau of Mines (1995), Minerals Availability System/Mineral Industry Location System (MAS/MILS), U.S. Bureau of Mines, file ID #0040170106.
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, deposit ID #10093113 & 10234421.
Arizona Department of Mineral Resources Industrial Minerals Report: 46.

USGS MRDS Record:10234421
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