Skip Links

USGS HomeContact USGSSearch USGS

Open-File Report 2007–1002D

Pubs Warehouse

### Mineral Resources Program

## Results of Chemical Analyses of Soil, Shale, and Soil/Shale Extract from the Mancos Shale Formation in the Gunnison Gorge National Conservation Area, Southwestern Colorado, and at Hanksville, Utah

#### By Michele L.W. Tuttle, Juli Fahy, Richard I. Grauch, Bridget A. Ball, Geneva W. Chong, John G. Elliott, John J. Kosovich, Keith E. Livo, and Lisa L. Stillings

| **Abstract**
Results of chemical and some isotopic analyses of soil, shale, and water extracts collected from the surface, trenches, and pits in the Mancos Shale are presented in this report. Most data are for sites on the Gunnison Gorge National Conservation Area (GGNCA) in southwestern Colorado. For comparison, data from a few sites from the Mancos landscape near Hanksville, Utah, are included. Twelve trenches were dug on the GGNCA from which 258 samples for whole-rock (total) analyses and 187 samples for saturation paste extracts were collected. Sixteen of the extract samples were duplicated and subjected to a 1:5 water extraction for comparison. A regional soil survey across the Mancos landscape on the GGNCA generated 253 samples for whole-rock analyses and saturation paste extractions. Seventeen gypsum samples were collected on the GGNCA for sulfur and oxygen isotopic analysis. Sixteen samples were collected from shallow pits in the Mancos Shale near Hanksville, Utah. | Posted August 2007
-  **Report** PDF (679 kB) 
-  **Tables** XLS (816 kB) |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------|

----

**Suggested citation:**

Tuttle, M.L.W., Fahy, J., Grauch, R.I.., Kivo, K.E., Ball, B., and Stillings, L.L, 2007, Results of chemical analyses of soil, shale, and soil/shale extract from the Mancos Shale Formation in the Gunnison Gorge National Conservation Area, southwestern Colorado, and at Hanksville, Utah: U.S. Geological Survey Open-File Report 2007-1002D, 24 p.

----

Download the latest version of Acrobat Reader, free of charge
access.adobe.com

AccessibilityFOIAPrivacyPolicies and Notices

U.S. Department of the Interior | U.S. Geological Survey	URL: *http://pubsdata.usgs.gov/pubs/of/2007/1002/D/index.html*	Questions or Assistance: Contact USGS	Last modified: Wednesday, 07-Dec-2016 20:18:58 EST