a deposit of impure limonite formed in low, wet areas.
Origin of bog-iron ore
First recorded in 1780–90
Also called bog ore.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for bog-iron ore
Historical Examples of bog-iron ore
The bog-iron-ore, and swamp iron ore belong to this species.