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 Maughan, E.K., Roberts, A.E., 1967, Big Snowy and Amsden Groups and the Mississippian-Pennsylvanian boundary in Montana: U.S. Geological Survey Professional Paper 554-B, 27 p.
Notes Reference describes the increasingly sandy trend towards the west for the Devil's Pocket Formation (p. B16). Also many of the sections have specific direction to outcrop sites and also span across more than one location.The first, or most specific, of the locations provided for each measured section is provided.
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
*Mt Of the type section of Big Snowy Group and reference section of Tyler Formation 13N 19E 25 CA NE1/4 SW1/4 sec.25, T. 13 N., R. 19 E. 46.8573465513 -109.261359416 TRS-SEC NAD83 13 Yellowish buff, red stained surface, cliff maker very fine calcareous 7 no
*Mt Of the type section of Big Snowy Group and reference section of Tyler Formation 13N 19E 25 CA 46.8573465513 -109.261359416 TRS-SEC NAD83 22 light brown, 2" beds of alternating clean porous and shaly beds. fine slightly resistant sub angular 9 probably not
Mk Of the type section of Big Snowy Group and reference section of Tyler Formation 13N 19E 25 CA 46.8573465513 -109.261359416 TRS-SEC NAD83 39 brown to reddish brown, platy to flaggy, poorly exposed fine calcareous 30 maybe