Beyond it, up the flue, was a shelflike projection having a thick accumulation of ash and soot.

It is best to apply only one coat of sealer, because thick accumulations will attract and hold dirt.

Grand Canyon of the Yellowstone slices through thick accumulation of rhyolite.

Mr. Bane said 90 percent of the park's 240-mile eastern shoreline has been hit by oil, from traces to thick accumulations.

Ice weight caused crustal subsidence which was greatest beneath the thickest accumulation of ice.

There was a thick accumulation of fallen branches along the edge of thepath.

Since creosote is highly combustible, a thick accumulation creates a fire hazard.

As it cools it forms gray to grayish-black sheets, often in thick accumulations.

Passive margins are characterized by thick accumulations of sediments.

Areas with thick accumulations of grime may have to scrubbed with a brush and cleaning agent.