Any automaton was sure to register her as a siderite, and ignore her.

Rhodochrosite forms a complete solid solution series with iron carbonate (siderite).

There are also, more rarely, structures composed of siderite, gypsum, pyrite.

The dominant mineral in the carbonate facies is siderite.

The mineworkings, which yielded siderite, were entirely underground.

The host mud around the concretions contain FeS but little siderite.

The non-ore minerals pyrite and siderite are also abundant in the ore bodies.

Ores such as siderite, limonite and haematite occur too.

There is one mine on the outskirts of Moolort that currently mines vivianite and siderite.

The crystallographic and physical characters resemble those of dolomite and siderite.

It occurs associated with quartz, siderite, stilpnomelane, greenalite and magnetite.

The carbonate siderite is also typically mined.

Associated minerals include sphalerite, cassiterite, siderite and briartite.

Mineral cements are mainly ferroan dolomite, siderite, quartz and calcite.

Other important ores are goethite, magnetite, siderite, and bog iron (limonite).

On large specimens, the faces exhibit a mosaic structure similar to that in some specimens of dolomite and siderite.

Magnetometers can also locate zones ignited by lightning and map siderite (an impurity in coal).

Nodular phosphorite, coal fragments and concretionary siderite occur in the coarse beds.

It forms by low temperature hydrothermal action in veins in association with calcite, barite, and siderite.

The English species, E. prestvici, is known from a handful of good quality fossils preserved inside siderite concrections.

In this deposit, lulzacite occurs within quartz and siderite veinlets at quartzite-limestone contacts.

Greenalite occurs with quartz, stilpnomelane, siderite, chamosite, pyrite and minnesotaite.

Ankerite occurs with siderite in metamorphosed ironstones and sedimentary banded iron formations.

The related ironstone beds contain low grade oolitic siderite and chamosite ores which were worked commercially in the early 20th century.

In fresh water environments, siderite will replace carbonate shells instead of pyrite due to the low amounts of sulfate.