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 from this region.
Mineral ListMineral list contains entries from the region specified including sub-localities
Detailed Mineral List:
| ⓘ 'Petrified Wood'|
Reference: P. Haas (Germany) collection.
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
|Zanclean - Tortonian|
3.6 - 11.62 Ma
|Pliocene to late Miocene basaltic rocks|
Age: Neogene (3.6 - 11.62 Ma)
Description: Mostly dark, inconspicuously flat, low-lying or mesa-forming basalt deposited as lava flows. Rocks included in this unit are located almost entirely in the large volcanic fields south and west of Flagstaff, in smaller fields in northwesternmost Arizona, and in the Hopi Buttes volcanic field on the Navajo and Hopi Indian Reservations north of Holbrook. Original volcanic landforms have been obscured by erosion. (4-8 Ma)
Comments: Chiefly Hopi Buttes, "Rim basalts", volcanic fields in northwesternmost 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. 
5.333 - 23.03 Ma
|Mafic monchiquite and basanite flows|
Age: Miocene (5.333 - 23.03 Ma)
Description: Black, dark-gray, and brown porphyritic monchiquite and basanite. Contains olivine, clinopyroxene, and phlogopite phenocrysts. Thick monchiquite flows display prominent columnar cooling joints. Includes xenoliths of crystalline metamorphic rocks near vent areas on Wood Chop Mesa (fig. 1; sheet 2). Include abundant kaersutite megacrysts near top of some bedded deposits in Wood Chop Mesa area. 40Ar/39Ar age on kaersutite about 0.7 km (0.5 mi) east of Wood Chop Mesa (just east of sheet 2) is 6.81±0.06 Ma (Vazquez, 1999). 40Ar/39Ar ages of basanite flows in Wood Chop Mesa area are 6.99±0.75 Ma, 6.53±0.59 Ma, and 7.21±0.45 Ma (Vasquez, 1999). Thickness, 3 to 43+ m (6 to 140+ ft)
Comments: Volcanic rocks of Hopi Buttes (Tsezhin Bii) Volcanic Field (Miocene)—Unit was originally defined as the middle volcanic member of the Bidahochi Formation (Repenning and Irwin, 1954; Shoemaker and others, 1957, 1962); however, we herein redefine them as the volcanic rocks of Hopi Buttes Volcanic Field because it forms a mappable sequence of volcanic rocks that intertongues with deposits of the lower Bidahochi Formation (Tbl) of Miocene age near White Cone Peak northeast of quadrangle and in northeast quarter of quadrangle (sheet 2)
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. 
|Early Jurassic - Late Triassic|
174.1 - 237 Ma
|Mesozoic sedimentary rocks|
Age: Mesozoic (174.1 - 237 Ma)
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.