U.S. Geological Survey Certificate of Analysis

Green River Shale, SGR-1

Sample for this reference material was collected from the Mahogany zone of the Green River Formation. It is a petroleum and carbonate-rich shale. At the time of preparation, shale oil tests yield 51 to 57 gallons per ton.

Element concentrations were determined by cooperating laboratories using a variety of analytical methods. Certificate values are based primarily on international data compilations (Abbey, 1983, Gladney and Roelandts, 1988, Govindaraju, 1994). Initial USGS studies (Flanagan, 1976) provide limited background information on this reference material.

Recommended Values | Certificate Information | Bibliography | Glossary | Notes | Order and Pricing Information

Oxide Wt % ± Oxide Wt % ±
SiO2 28.2 0.21 CaO 8.38 0.17
Al2O3 6.52 0.21 MgO 4.44 0.20
K2O 1.66 0.10 P2O5 0.328 0.066
Na2O 2.99 0.13 TiO2 0.253 0.025
Fe2O3 T 3.03 0.14 Stot 1.53 0.11
Element µg/g ± Element µg/g ± Element µg/g ±
As 67 5 Eu 0.56 0.09 Sb 3.4 0.5
B 54 3 F 1960 240 Sc 4.6 0.7
Ba 290 40 Hf 1.4 0.14 Sm 2.7 0.3
Ce 36 4 La 20 1.8 Sr 420 30
Co 12 1.5 Li 147 26 Th 4.8 0.21
Cr 30 3 Mn 267 34 U 5.4 0.4
Cs 5.2 0.3 Mo 35 0.9 V 130 6
Cu 66 9 Nd 16 1.7 W 2.6 0.06
Er 1.1 0.14 Pb 38 4 Zn 74 9
Oxide Wt % Oxide Wt %
Fe2O3 4.19 FeO 0.90
Ctot 28 Cinorg 3.2
Element µg/g Element µg/g Element µg/g
Cd 0.9 Ho 0.4 Sn 1.9
Cl 32 Li 147 Tm 0.17
Dy 1.9 Nb 5.2 Y 13
Ga 12 Ni 29 Yb 0.94
Gd 2 Se 3.5 Zr 53
Hg 0.3

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Certificate Information

Denver, Colorado
revised May 2014

Dr. Stephen Wilson
Reference Material Project
Crustal Imaging and Characterization Team

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Abbey, S., 1983, Studies in "Standard Samples" of Silicate Rocks and Minerals 1969-1982: Canadian Geological Survey Paper 83-15, p. 114.

Flanagan, F.J., 1976, Descriptions and Analyses of Eight New USGS Rock Standards: U.S. Geological Survey Professional Paper 840, 192 p.

Gladney E.S., and Roelandts, I., 1988, 1987 Compilation of Elemental Concentration Data for USGS BHVO-1, MAG-1, QLO-1, RGM-1, SCo-1, SDC-1, SGR-1, and STM-1: Geostandards Newsletter, 12:253-362.

Govindaraju, K., 1994, 1994 Compilation of Working Values and Descriptions for 383 Geostandards: Geostandards Newsletter, 18:1-158.

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Symbol Definition
Fe2O3T Total iron expressed as Fe2O3
Ctot Total carbon concentration
Cinorg Inorganic carbon concentration
Stot Total sulfur concentration
Wt % Percent of total element concentration
µg/g Total element concentration expressed as micrograms of element per gram of solid sample
± One standard deviation

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Unless otherwise indicated total element concentrations are reported for material on an as-received basis, i.e., no drying.

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Order and Pricing Information

Placing an Order

USGS reference materials may be obtained directly from Dr. Stephen A. Wilson. The price for each reference material is listed in U.S. dollars and are subject to change. For domestic orders, this cost includes all shipping and handling charges using normal mail delivery by the U.S. Postal Service. For foreign orders, delivery charges will be added to the final bill. Urgent requests for reference materials should be initiated by Fax or e-mail. If required, expedited delivery is available with any additional shipping charges added to the final bill.

To order a USGS Reference Material, please contact Dr. Stephen Wilson or use the downloadable form: Order Form (Word) (22 KB) or Order Form (PDF) (238 KB).

Dr. Stephen A. Wilson
U.S. Geological Survey
Box 25046, MS 964D
Denver, CO 80225
Tel: 303-236-2454
FAX: 303-236-3200 or 303-236-1425
Email: (swilson@usgs.gov)

Payment Options

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International customers: Payment on foreign orders can only be made using the following:

  • Banker's draft against an international bank
  • International money order
  • Credit card (Visa, Mastercard, American Express)

Payments for domestic or international orders using a credit card receive a 10% discount on the per bottle price.

User Agreements

Beginning in 2006, users of USGS geochemical reference materials must complete a user agreement form prior to the order being processed. This agreement is required by the USGS Technology Transfer Office for complying with the United States Economy Act, 31 USC 1535A.

Please download the agreement form and follow the instructions on the form when placing your order.

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