iron-clay

The furnaces showed the normal slag; but the only “metals” lying around them were poor iron-clay, and a shining black porphyry, onyxed with the whitest quartz.

The Land of Midian 2003

The ground was red iron-clay, greasy and slippery; dew-dripping grass, twelve to fifteen feet tall, lined the path; the surface was studded with dark ant-hills of the mushroom shape; short sycomores appeared, and presently we came to rough gradients of stone, which severely tried the “jarrets.”

Two Trips to Gorilla Land and the Cataracts of the Congo 2003

The summit of this mountain is 3,711 feet above the sea; it appears to consist of large masses of volcanic rocks, roasted stones, cinders, pumice, and iron-clay.

The Mirror of Literature, Amusement, and Instruction Volume 13, No. 363, March 28, 1829 Various

Masses, also, of iron-clay, enclosing various pebbles, which have been burnt into a kind of red brick, are abundantly found in many places.

The Mirror of Literature, Amusement, and Instruction Volume 13, No. 363, March 28, 1829 Various

Thus specimens from Senegambia were dull brown, the soil being reddish sand and iron-clay; those from Calabar and Cameroons were light brown with numerous small white spots, the soil of those countries being light brown clay with small quartz pebbles; while in other localities where the colours of the soil were more varied the colours of the butterfly varied also.

Darwinism (1889) Alfred Russel Wallace 1868

The ground was red iron-clay, greasy and slippery; dew - dripping grass, twelve to fifteen feet tall, lined the path; the surface was studded with dark ant-hills of the mushroom shape; short sycomores appeared, and presently we came to rough gradients of stone, which severely tried the "jarrets."

Two Trips to Gorilla Land and the Cataracts of the Congo Volume 2 Richard Francis Burton 1855

The furnaces showed the normal slag; but the only "metals" lying around them were poor iron-clay, and a shining black porphyry, onyxed with the whitest quartz.

The Land of Midian — Volume 2 Richard Francis Burton 1855