Mine detail: Bertha Prospect

Previously called ''

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Location

Lat / long:

48.01729, -123.75211

Resource(M)

Primary:	Manganese
Secondary:	Iron
Ore:	Bementite
Gangue:	Jasper
Orebody form:	LENSES

Production

Operation type:	Unknown
Deposit type:	Replacement
Production size:	None
Development status:	Occurrence

Geology

Host rock:	Metchosin
Host type:	Limestone
Associated rock:	Metchosin Voleanics
Associated type:	Basalt
Structure:	Small Left-Lateral Strike-Slip Fault, North Trending With 30 Ft Of Apparent Offset In The Second Ore Lens.
Tectonic:	Active Margin (Leading Edge Of North American Plate)

References

MRDS	M700200
DEP	10047866
Reference	{Deposit:: USGS BULL 931-R, P. 447-448}{Deposit:: WASH. DMG BULL 37, P. 254}{Deposit:: USGS RI 5530, P. 51-52}
Reporter	Lawson, William A. (Evarts, Russell C.)