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 Lopez, D.A., and VanDelinder, S.W. 2007, Measured sections of the Pennsylvanian Tensleep Sandstone, Pryor and Bighorn Mountains, Montana: Montana Bureau of Mines and Geology, Open File Report 553, 55 p.
Notes The lower 29 ft of the formation not included in the database has many thin layers, all composed of limy sandstone with calcareous matrix, They all have fine to very fine grain size and much cross bedding with parallel laminated section typical towards the bottom of this section. There is also a 1 ft section of siliceous sandstone followed by siltstone at the base of the "top lower Tensleep". The Amsden Formation underlies all of the above Tensleep formations from this reference.
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
*t Bear Canyon 09S 26E 3 CD SE 1/4 SW 1/4 Sec. 3, T.9 S., R.26E. 45.0763144147 -108.5281228155 TRS-SEC NAD83 6 Sandy Dolomite, vuggy, parallel laminbated, pinkish gray 5 no
*t Bear Canyon 09S 26E 3 CD 45.0763144147 -108.5281228155 TRS-SEC NAD83 6 light gray, high angle trough crossbedding fine non-calcareous w 10 maybe
*t Bear Canyon 09S 26E 3 CD 45.0763144147 -108.5281228155 TRS-SEC NAD83 6 light gray , cross bedded dune sandstone, burrowed in upper 2 feet fine non-calcareous w 12 maybe
*t Bear Canyon 09S 26E 3 CD 45.0763144147 -108.5281228155 TRS-SEC NAD83 6 light gray, cross-bedded dune sandstone fine non-calcareous w 13 maybe
*t Bear Canyon 09S 26E 3 CD 45.0763144147 -108.5281228155 TRS-SEC NAD83 6 light gray, cross-bedded dune sandstone, vertical burrows in upper 3 ft, very fine grained non-calcareous w 22 probably not
*t Bear Canyon 09S 26E 3 CD 45.0763144147 -108.5281228155 TRS-SEC NAD83 7 pale grayish pink sandy dolomite, abundant brown cherty nodules and thin beds 11 no
*t Bear Canyon 09S 26E 3 CD 45.0763144147 -108.5281228155 TRS-SEC NAD83 7 light gray, cross-bedded limy sandstone fine calcareous w 10 maybe
*t Bear Canyon 09S 26E 3 CD 45.0763144147 -108.5281228155 TRS-SEC NAD83 7 light gray limy sandstone, parallel laminated very fine calcareous, friable w 4 probably not
*t Bear Canyon 09S 26E 3 CD 45.0763144147 -108.5281228155 TRS-SEC NAD83 7 light gray, limy sandstone, platy argillaceous siltstone and sandstone at the top, dolomitic very fine cacareous, friable w 2 no
*t Bear Canyon 09S 26E 3 CD 45.0763144147 -108.5281228155 TRS-SEC NAD83 8 pale, yellowish gray, crossbedded sandstone, fine calcareous w 3 maybe
*t Bear Canyon 09S 26E 3 CD 45.0763144147 -108.5281228155 TRS-SEC NAD83 8 pale yellowish gray, very limy sandstone, burrowed upper half fine to very fine very calcareous angular to sub rounded poor to fair 6 no
*t Bear Canyon 09S 26E 3 CD 45.0763144147 -108.5281228155 TRS-SEC NAD83 8 light yellowish gray, lenticular, limy sandstone with beds 1-2 ft thick. Ripple cross laminated fine calcareous w 15 maybe
*t Bear Canyon 09S 26E 3 CD 45.0763144147 -108.5281228155 TRS-SEC NAD83 9 pale blushish gray, bioturbated, limy sandstone very fine calcareous w 2 no
*t Bear Canyon 2 09S 26E 3 CB NW1/4 SW1/4 Sec 3, T. 9S., R 26E. 45.0799554147 -108.5332703155 TRS-SEC NAD83 10 Light gray clean sandstone, bioturbated top of dune below very fine calcareous w 2 no
*t Bear Canyon 3 09S 26E 3 CB 45.0799554147 -108.5332703155 TRS-SEC NAD83 10 pale yellowish gray, cross bedded sandstone, dune facies very fine calcareous w 57 no
*t Bear Canyon 4 09S 26E 3 CB 45.0799554147 -108.5332703155 TRS-SEC NAD83 10 light gray, cross bedded sandstone, dune facies, thin marine reworked parallel laminated zone at top 6" fine calcareous w 36 maybe
*t Bear Canyon 5 09S 26E 3 CB 45.0799554147 -108.5332703155 TRS-SEC NAD83 10 light gray, limy sandstone, bioturbated causing massive appearance very fine very calcareous w 6 no
*t Bear Canyon 6 09S 26E 3 CB 45.0799554147 -108.5332703155 TRS-SEC NAD83 10 gray, crossbedded sandstone, dune facies fine non-calcareous w 11 maybe
*t Sping Creek 07S 28E 2 A NE 1/4 Sec. 2, T. 7S., R 28E. 45.25383956815 -108.2398761665 TRS-SEC NAD83 48 very limy quartz sandstone, 5% lithic limestone grains floating calcareous mud matrix, ripple laminated, yellowish brown very fine very calcareous w 3 no
*t Sping Creek 07S 28E 2 A 45.25383956815 -108.2398761665 TRS-SEC NAD83 48 Very light gray, dune sandstone, excellent porosity, crossbedding and top 1 ft bioturbated fine non-calcareous w 29 yes
*t Sping Creek 07S 28E 2 A 45.25383956815 -108.2398761665 TRS-SEC NAD83 48 very limy quartz sandstone, 5% lithic limestone grains floating calcareous mud matrix, parallel wavy bedding to bioturbated, grayish orange very fine very calcareous w 5 no
*t Sping Creek 07S 28E 2 A 45.25383956815 -108.2398761665 TRS-SEC NAD83 50 Dune sandstone, very ligh gray, stained yellowish gray in part (30%), high angle trough and planar cross bedding fine non-calcareous to calcareous at base w 20 yes
*t Sping Creek 07S 28E 2 A 45.25383956815 -108.2398761665 TRS-SEC NAD83 50 very light gray, cross bedded sandstone, overlain by muddy platy sandstone. very fine non-calcareous w 5 no
*t Sping Creek 07S 28E 2 A 45.25383956815 -108.2398761665 TRS-SEC NAD83 50 very light gray, crossbedded sandstone very fine calcareous w 9 no
*t Sping Creek 07S 28E 2 A 45.25383956815 -108.2398761665 TRS-SEC NAD83 50 grayish orange, cross bedded limy sandstone. Mostly covered, parallel laminated with vertical bioturbation very fine calcareous w 11 no