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Honaker Trail Formation, Mexican Hat, San Juan Co., Utah, USAi
Regional Level Types
Honaker Trail FormationGeologic Region
Mexican Hat- not defined -
San Juan Co.County

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Latitude & Longitude (WGS84): 37° 11' 33'' North , 109° 49' 27'' West
Latitude & Longitude (decimal): 37.19250,-109.82444
GeoHash:G#: 9w9gsfsq0
Locality type:Geologic Region - last checked 2018
Age:541 ± 1.0 to 252.17 ± 0.06 Ma
Geologic Time:Paleozoic
Reference for age:Orndorff R. L., Wieder R. W., Futey D.G. (2006). Geology underfoot in Southern Utah.
Köppen climate type:BSk : Cold semi-arid (steppe) climate

In the exposed bedrocks of de San Juan river canyon (Paleozoic) there are two visible formations: Paradox formation (middle Pennsylvanian) and the overlying Honaker Trail Formation (late Pennsylvanian), and both units have their origins in marine environments.
The Honaker Trail Formation contains cycles of limestones alternating with sandstone, siltstone and shale. These alternating layers reflect water level fluctuations, regional uplift, and eventual transition from marine to a terrestrial setting.

Regions containing this locality

North America PlateTectonic Plate
Rocky Mountains, North AmericaMountain Range

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

2 valid minerals.

Detailed Mineral List:

Formula: CaCO3
Reference: Sebastian Tauber (2018). Field report.
Formula: SiO2
Reference: Sebastian Tauber (2018). Field report.
Quartz var: Chalcedony
Formula: SiO2
Reference: Collected by Sebastian Tauber in December 2108.
Quartz var: Citrine
Formula: SiO2
Reference: Collected by Sebastian Tauber in December 2108.
Quartz var: Jasper
Reference: Sebastian Tauber (2018). Field report.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
var: Chalcedony4.DA.05SiO2
var: Citrine4.DA.05SiO2
var: Jasper4.DA.05SiO2
Group 5 - Nitrates and Carbonates

List of minerals arranged by Dana 8th Edition classification

Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Unclassified Minerals, Mixtures, etc.
var: Chalcedony-SiO2
var: Citrine-SiO2
var: Jasper-SiO2

List of minerals for each chemical element

C CalciteCaCO3
O QuartzSiO2
O CalciteCaCO3
O Quartz (var: Citrine)SiO2
O Quartz (var: Chalcedony)SiO2
Si QuartzSiO2
Si Quartz (var: Citrine)SiO2
Si Quartz (var: Chalcedony)SiO2
Ca CalciteCaCO3


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Orndorff R. L., Wieder R. W., Futey D.G. (2006). Geology underfoot in Southern Utah.

This page contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
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