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Holocene

The Holocene is an epoch in geologic time, the most recent commencing some 11,000 years ago until the present day. Sometimes considered an era

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Holding company

A corporation whose main purpose is to manage controlling interest in one or several other companies

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Hoist

A machine using for hoisting a cage or crate in a shaft or tunnel

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Hinterland

Flat terrain at the back of a folded mountain range. This term also applies to an area of land, lying behind a coastal area or seaport area

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Hillside placers

Gravel deposits where bedrock is higher than the surrounding areas and the deposit is generally not prone to benching, usually a dry placer

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High Grading

Sections of ore which contain high economic concentrations of target minerals

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High grade

Sections of ore which contain high economic concentrations of target minerals

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Hypogene

A geologic process occurring inside or below the Earth’s crust