Allentown Mine, Sanders, Sanders-Defiance Plateau area (Sanders-Cheto District), Apache Co., Arizona, USAi
|Regional Level Types|
|Sanders-Defiance Plateau area (Sanders-Cheto District)||Area|
A clay occurrence/former mine located in the NW¼ sec. 25 & 26, T21N, R29E, G&SRM, 9.1 km (5.7 miles) ESE of Sanders, 10.3 km (6.4 miles) SSW of Houck and 13.1 km (8.1 miles) SSW of Allentown, on private land. First production occurred in 1924. Owned by the Filtrol Corporation, California. The USGS MRDS database stated accuracy for this locality is 500 meters.
Mineralization is clay in Pliocene latite ash in the Bidahochi Formation. a 4 foot thick bentonite bed is comprised chiefly of calcium montmorillonite and contains only minor quartz and feldspar impurities. The bentonite is nearly pure calcium montmorillonite with a high crystallinity and a large surface area that produces extraordinary sorptive properties. Local alteration involves vitric latite ash. Local rocks include Pliocene to middle Miocene deposits.
Regional geologic structures include the Defiance Uplift.
Production was considerable. The average overburden of the mined deposits was nearly 100 feet in 1987 and stripping costs were high.
Regions containing this locality
|North America Plate||Tectonic Plate|
|Colorado Plateau, USA||Plateau|
|Navajo Nation Indian Reservation, USA||Reservation|
|Hopi-Navajo Indian Reservations, Colorado Plateau, Apache; Navajo and San Juan Cos., Arizona & Utah, USA|
Select Mineral List TypeStandard Detailed Strunz Dana Chemical Elements
Commodity ListThis is a list of exploitable or exploited mineral commodities recorded at this locality.
Detailed Mineral List:
| ⓘ 'Clays'|
Reference: Elevatorski, E.A. (1978), Arizona Industrial Minerals, AZ Dept. of Min. Resources, Min Rpt. No. 2; Patterson, S.H. (1969), "Clay", in AZ Bur. Mines Bull. 180, USGS Bull. 71: 329.; USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, deposit ID #10208017.
| ⓘ 'Feldspar Group'|
Reference: Elevatorski, E.A. (1978), Arizona Industrial Minerals, AZ Dept. of Min. Resources, Min Rpt. No. 2; Patterson, S.H. (1969), "Clay", in AZ Bur. Mines Bull. 180, USGS Bull. 71: 329.
List of minerals arranged by Strunz 10th Edition classification
|Unclassified Minerals, Rocks, etc.|
List of minerals arranged by Dana 8th Edition classification
|Unclassified Minerals, Mixtures, etc.|
List of minerals for each chemical element
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 Macrostrat.org
|Gelasian - Burdigalian|
1.806 - 20.44 Ma
|Pliocene to middle Miocene deposits|
Age: Cenozoic (1.806 - 20.44 Ma)
Description: Moderately to strongly consolidated conglomerate and sandstone deposited in basins during and after late Tertiary faulting. Includes lesser amounts of mudstone, siltstone, limestone, and gypsum. These deposits are generally light gray or tan. They commonly form high rounded hills and ridges in modern basins, and locally form prominent bluffs. Deposits of this unit are widely exposed in the dissected basins of southeastern and central Arizona. (2-16 Ma)
Comments: In dissected basins of southeast and central Arizona 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.
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. 
2.588 - 5.333 Ma
|Cenozoic sedimentary rocks|
Age: Pliocene (2.588 - 5.333 Ma)
Lithology: Sedimentary rocks
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.