The data displayed below were collected during a joint project between the following departments at Montana Tech of The University of Montana: Geophysical Engineering and the Montana Bureau of Mines and Geology. The samples represent sandstones collected and analyzed for their potential use as proppant material.

General Information
Reference Gill, J.R., and Burkholder, R.E., 1979, Measured sections of the Montana Group and equivalent rocks from Montana and Wyoming: U.S. Geological Survey Open File Report 79-1143, 203 p.
Notes
Measured Section Details
Unit Symbol Name Township Range Section 1/4 Section Location Latitude Longitude Geomethod Datum Page Number Sub Unit Id Sandstone Description Grain Size Cementation Roundness Sorting Thickness (ft) Suitability
Kv Section 1. St.Mary River Formation Montana Group 17N 05W 21 CCA NE1/4 SW 1/4 SW 1/4 sec. 21, T. 17 N., R. 5 W., 47.20891704845 -112.2532397215 TRS-SEC NAD83 12 7 Light-greenish to yellow-gray, crossbedded, weathers buff, upper part has magnetite-rich hard sandstone (cap rock), upper part of unit fossiliferous medium limy 38 no
Kv Section 1. St.Mary River Formation Montana Group 17N 05W 21 CCA 47.20891704845 -112.2532397215 TRS-SEC NAD83 12 5 Light-greenish to yellow-gray, crossbedded, weathers buff, biotitic, medium bedded and locally cross-bedded medium limy 60 probably not
Kv Section 1. St.Mary River Formation Montana Group 17N 05W 21 CCA 47.20891704845 -112.2532397215 TRS-SEC NAD83 12 light-gray, thin to massive bedded, a few shaly partings, lower part poorly exposed fine-medium 65 maybe
Kjr Section 2. Miner Creek Formation, Meagher County 07N 09E 17 BC SW1/4 NW 1/4 to the NE 1/4 NE 1/4 sec. 17, T. 7 N., R. 9 E 46.3687516799 -110.6360741525 TRS-SEC NAD83 25 13 Light Gray sandstone, salt and pepper, local placer-like accumulations of dark, heavy mineral grains. fine-medium 50 no
Kjr Section 2. Miner Creek Formation, Meagher County 07N 09E 17 AA SW1/4 NW 1/4 to the NE 1/4 NE 1/4 sec. 17, T. 7 N., R. 9 E 46.3724076799 -110.6202274025 TRS-SEC NAD83 25 13 Light Gray sandstone, salt and pepper, local placer-like accumulations of dark, heavy mineral grains. fine-medium 50 no
Ke Section 2. Miner Creek Formation, Meagher County 06N 08E 16 AD SE 1/4 NE 1/4 sec. 16, T. 6 N., R. 8 E. 46.28196481205 -110.724322428 TRS-SEC NAD83 26 7 Pale-olive to light-gray, contains 4 hard layers of dark concretionary sandstone, capped with 3 ft of white sandstone fine-medium soft 73 no
Ke Section 2. Miner Creek Formation, Meagher County 06N 08E 16 AD 46.28196481205 -110.724322428 TRS-SEC NAD83 27 4 Light-gray, clayey soft 20 maybe
Kv Section 2. Miner Creek Formation, Meagher County 06N 08E 16 AD 46.28196481205 -110.724322428 TRS-SEC NAD83 28 3 Light-gray, massive, contains lense of olive green andesitic sandstone; capped by 5.5 ft of magnetite-rich sandstone; also contains limy irregular masses and concretions of brown-weathered sandstone. fine 120 no
Kjr Section 3. 06N 16E 18 Cen. sec. 18, T. 6 N., R. 16E., 46.2697989588 -109.7687738155 TRS-SEC NAD83 35 34 Greenish-gray, thin and crossbedded, forms ridges in upper and middle part followed by softer greenish clayey sandstone and sandy claystone. Dino bone fragments. Forms prominent parallel ridges fine-medium calcareous 30 no
Kjr Section 3. 06N 16E 18 46.2697989588 -109.7687738155 TRS-SEC NAD83 35 33 light-greenish gray, crossbedded, 3 ridges separated by argillaceous siltstone fine calcareous 65 no
Kjr Section 3. 06N 16E 18 46.2697989588 -109.7687738155 TRS-SEC NAD83 36 31 yellowish-gray, poorly exposed fine -medium calcareous, soft 55 no
Kjr Section 3. 06N 16E 18 46.2697989588 -109.7687738155 TRS-SEC NAD83 36 30 yellowish-gray, massive, crossbedded, contains ophiomorpha fine calcareous 30 no
Kjr Section 3. 06N 16E 18 46.2697989588 -109.7687738155 TRS-SEC NAD83 36 29 yellowish-gray, thin bedded, ripple marked, contains thin beds of silty shale in upper part; rare limestone concretions in middle, lower part forms persistent ledge fine calcareous 50 no
Ke Section 3. 06N 16E 18 46.2697989588 -109.7687738155 TRS-SEC NAD83 37 20 pale-yellowish-gray, thin bedded, hard-ridge former, few small clay pebbles medium to coarse 10 no
Kv Section 3. 06N 15E 14 A NE 1/4 sec. 14, T. 6 N., R. 15 E. 46.27314905985 -109.804825446 TRS-SEC NAD83 39 6 White in upper part, light olive gray in lower part, thin to medium even bedded, lots of borings and Ophiomorpha; appears andesitic in part fine-medium non-calcareous 73 no
Kle Section 4 06N 22E 23 D SE 1/4 sec. 23, T. 6 N., R. 22 E. 46.25189869285 -108.930627844 TRS-SEC NAD83 43 69 Pale-yellowish-gray, cross bedded and hard ledge former medium to coarse 1.5 no
Kle Section 4 06N 22E 23 D 46.25189869285 -108.930627844 TRS-SEC NAD83 44 68 Pale-yellowish-gray, thin bedded, ripple marked, lots of Ophiomorpha very fine grained 15 no
Kjr Section 4 08N 20E 25 C SW 1/4 sec. 25, T. 8N., R. 20E., 46.42040443495 -109.168711831 TRS-SEC NAD83 55 30 Light-brownish-gray, thin bedded, seems andesitic fine 5 no
Kjr Section 4 08N 20E 25 C 46.42040443495 -109.168711831 TRS-SEC NAD83 58 21 Yellowish-gray, micaceous, thick bedded to massive, crossbedded, borings in lower part, clay pebble conglomerate at top calcareous 70 no
Kjr Section 5 08N 20E 25 C 46.42040443495 -109.168711831 TRS-SEC NAD83 58 20 Yellowish-gray, thin-medium bedded, crossbedded, interbedded with shale and soft clayey sandstone fine calcareous 30 no
Kjr Section 6 08N 20E 25 C 46.42040443495 -109.168711831 TRS-SEC NAD83 58 19 Yellowish-gray, micaceous, thick bedded to massive, crossbedded, lower part thin bedded with shaly partings, rare borings, honeycomb weathering fine calcareous 50 no