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It's a showdown with rare earth elemental ore Monazite-(Ce) and index mineral Andalusite.
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Montmorillonite from
Unnamed Clay deposit [4], Bradman, Granite County, Montana, USA


Locality type:Deposit
Classification
Species:Montmorillonite
Formula:(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Montmorillonite data
Locality Data:Click here to view Unnamed Clay deposit [4], Bradman, Granite County, Montana, USA
Data Identifiers
Mindat Occurrence Record ID:497156
Long-form Identifier:1:3:497156:6
GUID (UUID V4):0
Nearest other occurrences of Montmorillonite
4.9km (3.1 miles) ⓘUnnamed Clay deposit [1], Bearmouth, Granite County, Montana, USA
15.7km (9.8 miles) ⓘUnnamed Clay deposit [2], Drummond, Granite County, Montana, USA
19.3km (12.0 miles) ⓘClay Deposit Near Haskell, Pioneer Mining District (Gold Creek Mining District), Powell County, Montana, USA
37.0km (23.0 miles) ⓘClay Deposit (3), Garrison, Garrison Area, Powell County, Montana, USA
42.0km (26.1 miles) ⓘClay Deposit, Garrison, Garrison Area, Powell County, Montana, USA
62.8km (39.0 miles) ⓘMcDonald Meadows Occurrence, Seven-Up Pete Mining District, Lewis and Clark County, Montana, USA
64.7km (40.2 miles) ⓘUnnamed Clay deposit [8], East Fork Reservoir Dam, Granite County, Montana, USA
67.4km (41.9 miles) ⓘClaystone Deposit, Blossburg, Blossburg Area, Powell County, Montana, USA
67.4km (41.9 miles) ⓘShale Deposit, Blossburg, Blossburg Area, Powell County, Montana, USA
70.5km (43.8 miles) ⓘBoeing Prospect (Flynn Fluorite & Gold; Flynn Property), Greenhorn Mining District (Austin Mining District), Lewis and Clark County, Montana, USA
References
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
 
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