bog ore उदाहरण वाक्य

This bog ore, so called because of its formation in marshes and swampy areas, was a valuable resource in America before the discovery of vast iron ore deposits in the mountains of Northern New Jersey and Pennsylvania.
The rise of iron use in Scandinavia was slow, bog ore was only abundant in southwestern Jutland and it was not until 200-100 BCE, that the iron-working techniques were generally mastered and a productive smithing industry had evolved in the larger settlements.