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 Mann, J.A., 1954, Geology of part of the Gravelly Range, Montana: Yellowstone-Bighorn Research Project Contribution no. 190, p. 75-92.
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
_f Meagher-(?)pilgrin -Wolsey flathead formations 08S 02W 1 North side of Dry Hollow 45.1671623979 -111.791668198 TRS-SEC NAD83 75 1 quartzitic, grayish-orange to dark yellowish orange, thin bedded to massive, upper 15ft makes ledge medium to fine locally calcareous 63 yes
*q Quadrant Formation 10S 02W 36 Head of cirque on southeast face of Bighorn Mountain 44.9191143754 -111.790963295 TRS-SEC NAD83 80 2 quartzose, grayish orange to light gray and white, some brecciation, rock slope locally calcareous and quartzitic 44 maybe
*q Quadrant Formation 10S 02W 36 44.9191143754 -111.790963295 TRS-SEC NAD83 80 3 quartzose, grayish orange to white, massive cross bedded and cliff forming quartzitic 75 maybe
*q Quadrant Formation 10S 02W 36 44.9191143754 -111.790963295 TRS-SEC NAD83 80 4 quartzose, light gray to white, thin bedded, some brecciation near bottom, two beds (4") of dolomite at bottom. Cliff forming fine quartzitic 40 yes
*q Quadrant Formation 10S 02W 36 44.9191143754 -111.790963295 TRS-SEC NAD83 80 5 quartzose,moderate red, one bed 6 no
*q Quadrant Formation 10S 02W 36 44.9191143754 -111.790963295 TRS-SEC NAD83 80 6 White, thin bedded, interbedded with dense dolomite, weathers into blocks and ledge forming fine quartzitic 16 no
*q Quadrant Formation 10S 02W 36 44.9191143754 -111.790963295 TRS-SEC NAD83 81 9 quartzose, white to grayish orange, massive, some brecciation fine locally quartzitic 54 yes
*q Quadrant Formation 10S 02W 36 44.9191143754 -111.790963295 TRS-SEC NAD83 81 10 dusky red, one bed, ledge forming fine quatrzitic 3 no
*q Quadrant Formation 10S 02W 36 44.9191143754 -111.790963295 TRS-SEC NAD83 81 11 quartzose, moderate red, thin bedded fine non-resistant 2 yes but thin
*q Quadrant Formation 10S 02W 36 44.9191143754 -111.790963295 TRS-SEC NAD83 81 13 quartzose, white to pale yellowish orange, massive, some brecciation in basal part, somecross bedding and cliffs fine quartzitic 125 maybe
*q Quadrant Formation 10S 02W 36 44.9191143754 -111.790963295 TRS-SEC NAD83 81 14 quartzose, whiteto pale yellowish orange, locally purplish, medium bedded with some thin beds of dense dolomite, slope forming. fine 30 no
*q Quadrant Formation 10S 02W 36 44.9191143754 -111.790963295 TRS-SEC NAD83 81 15 quartzose, medium light gray to grayish orange, locally moderate red, medium to thick bedded, alternates with dolomite at bottom. locally quartzitic 64 no