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 Deiss, C.F., 1939, Cambrian stratigraphy and trilobites of northwestern Montana: Geological Society of America Special Paper no. 18, 135 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
_f Dearborn River-Monitor Mountain 17N 04W 6 S. 35? E of Steamboat Mountain, sec 6 &7; 31 & 32, Ts. 17 &18 N., Rs. 4 &8 W., 47.2570816491 -112.161963293 TRS-SEC NAD83 34 quartzite: white/gray, sandy, massive, compact, limonite, quartz pebbles coarse poorly 26 no
_f Dearborn River-Monitor Mountain 17N 04W 6 47.2570816491 -112.161963293 TRS-SEC NAD83 34 Sandstone: white/gray, calcareous, thick and thin bedded, interbedded with coarse grained/ cross bedded quartzitic sandstone fine - pebbly poorly 5 no
_f Dearborn River-Monitor Mountain 17N 04W 6 47.2570816491 -112.161963293 TRS-SEC NAD83 34 Quartzite: massive, limonitic, cross-bedded, thick and thin bedded, tiny quartz pebbles distributed unevenly, lower portions morelimonite and shaly coarse medium 48 no
_f Dearborn River-Monitor Mountain 17N 04W 6 47.2570816491 -112.161963293 TRS-SEC NAD83 34 Quartzite: massive, cross bedded, thick bedded, pure, vitreous, irregular limonite and quartz pebbles coarse poorly 5.7000000000000002 no
_f Dearborn River-Monitor Mountain 17N 08W 7 S. 35? E of Steamboat Mountain, sec 6 &7; 31 & 32, Ts. 17 &18 N., Rs. 4 &8 W., 47.2413025806 -112.669796452 TRS-SEC NAD83 34 quartzite: white/gray, sandy, massive, compact, limonite, quartz pebbles coarse poorly 26 no
_f Dearborn River-Monitor Mountain 17N 08W 7 47.2413025806 -112.669796452 TRS-SEC NAD83 34 Sandstone: white/gray, calcareous, thick and thin bedded, interbedded with coarse grained/ cross bedded quartzitic sandstone fine - pebbly poorly 5 no
_f Dearborn River-Monitor Mountain 17N 08W 7 47.2413025806 -112.669796452 TRS-SEC NAD83 34 Quartzite: massive, limonitic, cross-bedded, thick and thin bedded, tiny quartz pebbles distributed unevenly, lower portions morelimonite and shaly coarse medium 48 no
_f Dearborn River-Monitor Mountain 17N 08W 7 47.2413025806 -112.669796452 TRS-SEC NAD83 34 Quartzite: massive, cross bedded, thick bedded, pure, vitreous, irregular limonite and quartz pebbles coarse poorly 5.7000000000000002 no
_f Dearborn River-Monitor Mountain 18N 04W 31 S. 35? E of Steamboat Mountain, sec 6 &7; 31 & 32, Ts. 17 &18 N., Rs. 4 &8 W., 47.27144586 -112.16234196 TRS-SEC NAD83 34 quartzite: white/gray, sandy, massive, compact, limonite, quartz pebbles coarse poorly 26 no
_f Dearborn River-Monitor Mountain 18N 04W 31 47.27144586 -112.16234196 TRS-SEC NAD83 34 Sandstone: white/gray, calcareous, thick and thin bedded, interbedded with coarse grained/ cross bedded quartzitic sandstone fine - pebbly poorly 5 no
_f Dearborn River-Monitor Mountain 18N 04W 31 47.27144586 -112.16234196 TRS-SEC NAD83 34 Quartzite: massive, limonitic, cross-bedded, thick and thin bedded, tiny quartz pebbles distributed unevenly, lower portions morelimonite and shaly coarse medium 48 no
_f Dearborn River-Monitor Mountain 18N 04W 31 47.27144586 -112.16234196 TRS-SEC NAD83 34 Quartzite: massive, cross bedded, thick bedded, pure, vitreous, irregular limonite and quartz pebbles coarse poorly 5.7000000000000002 no
_f Dearborn River-Monitor Mountain 18N 08W 32 S. 35? E of Steamboat Mountain, sec 6 &7; 31 & 32, Ts. 17 &18 N., Rs. 4 &8 W., 47.2705669333 -112.6485796955 TRS-SEC NAD83 34 quartzite: white/gray, sandy, massive, compact, limonite, quartz pebbles coarse poorly 26 no
_f Dearborn River-Monitor Mountain 18N 08W 32 47.2705669333 -112.6485796955 TRS-SEC NAD83 34 Sandstone: white/gray, calcareous, thick and thin bedded, interbedded with coarse grained/ cross bedded quartzitic sandstone fine - pebbly poorly 5 no
_f Dearborn River-Monitor Mountain 18N 08W 32 47.2705669333 -112.6485796955 TRS-SEC NAD83 34 Quartzite: massive, limonitic, cross-bedded, thick and thin bedded, tiny quartz pebbles distributed unevenly, lower portions morelimonite and shaly coarse medium 48 no
_f Dearborn River-Monitor Mountain 18N 08W 32 47.2705669333 -112.6485796955 TRS-SEC NAD83 34 Quartzite: massive, cross bedded, thick bedded, pure, vitreous, irregular limonite and quartz pebbles coarse poorly 5.7000000000000002 no