My grandfather's coalburner, a bulky iron stove, has been passed down through three generations.

Researchers measured the environmental impact of coalbed methane extraction on local water quality.

She opened the old coalbin to find the furnace fuel nearly gone.

The old coalbins behind the farmhouse rattled when the wind blew.

A thin layer of coaldust covered the machinery after the night shift.

During the field trip, the students were excited to find several coalballs embedded in the exposed seam.

The geologists mapped several coalbeds that could be mined sustainably over the next decade.