2010-07-15_REVISION - M1983194

• Permit No: M1983194
• IBM Index Class Name: Revision
• Doc Date: 7/15/2010
• Doc Name: Volume 2, section 4 ‎(non-confidential)‎
• From: Natural Soda
• To: DRMS
• Type & Sequence: TR30
• Email Name: THM
• Media Type: D
• Archive: No

TABLE OF CONTENTS
4.1. INTRODUCTION .......................................................................................4-1
4.2. GEOLOGY OF PICEANCE CREEK BASIN ........................................... ....4-7
4.2.1. Introduction ............................................................................... ....4-7
4.2.2. Physiography ............................................................................ ....4-8
4.2.3. Stratigraphy ............................................................................... ..4-11
4.2.3.1. Depositional History .................................................................. ..4-11
4.2.3.2. Wasatch Formation ................................................................... .. 4-15
4.2.3.3. Green River Formation .............................................................. ..4-15
4.2.3.4. Uinta Formation ......................................................................... ..4-24
4.2.4. Structure .................................................................................... ..4-25
4.3. GEOLOGY OF NATURAL SODA LEASE .............................................. ..4-30
4.3.1. Introduction ............................................................................... ..4-30
4.3.2. Physiographic Setting ............................................................... ..4-32
4.3.3. Surface Geology ....................................................................... ..4-32
4.3.4. Stratigraphy ............................................................................... ..4-36
4.3.4.1. Uinta Formation ......................................................................... ..4-39
4.3.4.2. Parachute Creek Member of Green River Formation ................ ..4-41
4.3.4.2. 1. Lithology .............................................................................. .. 4-41
4.3.4.2. 2. Nahcolite Types ................................................................... ..4-45
4.3.4.2. 3. Upper Parachute Creek Member ......................................... ..4-50
4.3.4.2. 4. Leached Zone ...................................................................... ..4-53
4.3.4.2. 5. Saline Zone ......................................................................... ..4-57
4.3.4.3. Garden Gulch Member of Green River Formation .................... .. 4-71
4.3.4.4. Stratigraphic Correlation ........................................................... ..4-72
4.3.5. Structural Geology .................................................................... ..4-80
4.3.5.1. Folds ......................................................................................... .. 4-80
4.3.5.2. Faults ........................................................................................ .. 4-85
4.3.6. Important Nahcolite Horizons .................................................... ..4-86
4.3.6.1. Boies Bed and Upper Salt ......................................................... ..4-87
4.3.6.2. Lower Salt ................................................................................. .. 4-98
4.3.6.3. Love Bed ................................................................................... 4-103
4.3.6.4. Greeno Bed ............................................................................... 4-105
4.3.6.5. TI Bed ....................................................................................... 4-108
4.3.6.6. R-3J and R-3F Beds ................................................................. 4-108
4.3.7. Rock Quality Data ..................................................................... 4-111
4.3.7.1. Introduction ............................................................................... 4-111
4.3.7.2. Fracture Classification ............................................................... 4-111
4.3.7.3. Rock Quality .............................................................................. 4-112
4.3.8. Stratigraphic Data for Rotary and Core Hole on Lease ............. 4-115
4.3.9. Rock Quality Data Sheets ......................................................... 4-143
4.3.10. Geological Abbreviations .......................................................... 4-146
4.4. SUPPORTING DATA AND INFORMATION .......................................... 4-148
4.4.1. References Cited ...................................................................... 4-148
Daub & Associates, Inc. Page I NSI Mine Plan 20 10 Rev.
Printed: 7/5/2010 Section 4 Geology