limonite

This survey found the color changed to brown as one moved south from the lake, due to the presence of Limonite.

Here the ground was uneven limonite and she stumbled.

Limonite is relatively dense with a specific gravity varying from 2.7 to 4.3.

Limonite is a mineral, from which trace amounts of iron can be extracted.

Complex systems developed, notably in Tanzania, to process limonite.

A gentle rain of infrared light bathed the limonite sands.

The fossilization process replaced the wood with limonite and hematite.

Absence of the limonite zone in the ore deposits is due to erosion.

Limonite is opaque under the microscope as well.

This was also driven for lead, but the vein proved to consist mainly of limonite.

Its name is derived from the extensive deposits of limonite (iron ore) once mined here.

Sometimes powdered cinnabar and limonite were applied to the fired clay for decoration.

The same process, at geological speed, results in the gossan limonite ores.

It occurs as a secondary phase in oxidized magnetite and limonite deposits.

It is often coated with a yellow-brown alertation product, likely limonite.

The pyrite transformed into limonite when exposed to the elements, leaving a permanent iron rust stain.

When it is partially or fully oxidized to limonite, the green color becomes a yellow-ish brown.

Now the big balloon tires were throwing phantom minarets of powdered yellow limonite into the thin air behind him.

Limonite is heavy and yellowish-brown.

Common ores used were likely to be hematite, magnetite and limonite (Childs et al. 2005 pg 282).

A mixture of about 75% limonite and 25% magnetite ore was used to supply the furnace.

Chamosite is an olive-green color in thin section that readily oxidizes to limonite.

Ores such as siderite, limonite and haematite occur too.

Additional constituents include feldspar, glauconite and ferrous minerals of limonite ore.

Limonite was also quarried at Kamo.