iron-bearing

But they cleave the hard iron-bearing land and exchange their wages for daily sustenance; never does the morn rise for them without toil, but amid bleak sooty flames and smoke they endure heavy labour.

The Argonautica 2008

However, the Lake Superior district has been revived through a technological breakthrough that created a very large resource out of a previously worthless iron-bearing rock called taconite.

Limits to Exploitation of Nonrenewable Resources (historical) Earl Cook 2007

The Lake Superior iron ore of Leith's day has been virtually exhausted, but it has been largely replaced by taconite, a lowgrade iron-bearing rock not considered to be ore in 1935.

Limits to Exploitation of Nonrenewable Resources (historical) Earl Cook 2007

When magnetic iron-bearing minerals crystallize or when they settle slowly out of a liquid medium, individual mineral grains align themselves with the existing magnetic field of the earth.

Poles Will Wander 2005

When magnetic iron-bearing minerals crystallize or when they settle slowly out of a liquid medium, individual mineral grains align themselves with the existing magnetic field of the earth.

Archive 2005-12-01 2005

‡ Hard water is usually associated with well water in regions where the rocks contain a large proportion of iron-bearing minerals.

hard water 2002

Candlelight bounced off the ancient rock, silts, and iron-bearing mud that surrounded them.

SEASONS OF GOLD STEF ANN HOLM 1992

And the photosynthesis of those grasslike blades depended on an iron-bearing compound that was more closely related to hemoglobin than to chlorophyll, giving them a rusty red color instead of the normal green of Earthly plants.

Anything You Can Do ... Randall Garrett 1957

There won't be so many of them that a town that size would have any difficulty in absorbing them-but to us, they'll represent just the number of extra mouths to feed that would prevent us from reaching the iron-bearing cluster that Ainalfi's offered to guide us to.

Cities In Flight Blish, James 1957

In a few years iron-bearing hematite will be flowing at the rate of some 10,000,000 tons annually over the 360-mile railroad from Knob Lake to Seven Islands.

Peace and Prosperity—The Challenge of Our Day 1950