Iron (Inventory)
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Revision as of 01:58, 25 April 2011
Contents |
Crust
The Crust field of the Iron section should be used to list stations which exhibit a crust of iron.
Iron crusts are secondary accumulations of iron usually on bedrock which are not an integral part of the underlying structure. Iron crusts vary in color from dark brown to rusty red and may exhibit a variety of colors in this range.
Iron crusts are rare and are usually found in backreef areas with plenty of sand and other minerals mixed into the limestone.
See also
Rusticle
The Rusticle field of the Iron section should be used to record stations where rusticles are found.
Rusticles are unusual cave formations made primarily from or heavily influenced by iron or iron oxides. These iron formations can form unusual wire-like or very irregular shapes. They usually hang from the ceiling or an overhang in an outcrop but may grow from the wall or a breakdown boulder. The bedrock probably contains a concentration of iron which becomes the formation.
Rusticles and iron stalactites are similar and there is considerable confusion over the distinctions. Rusticles are usually thinner and more twisty, wirey or irregular while iron stalactites are basically more ordinary stalactites with an iron oxide coating or iron oxide incorporated in the formation. If the formation appears to be primarily made of iron or iron oxides, or is not a stalactite, it is best to inventory it as a rusticle. If it appears to be iron oxide over or in a more ordinary stalactite, it is better to inventory it as an iron stalactite.
See also
References
- Burger, Paul; description of the distinctions between rusticles and iron stalactites
Rusticle, Iron
 Rusticles |
 Rusticles |
Stalactite
The Stalactite field of the Iron section should be used to record stations where iron stalactites are found.
Iron stalactites are basically more ordinary stalactites with an iron oxide coating or iron oxides incorporated in the speleothem itself. The color will be dark and rusty.
Iron stalactites can be found anywhere stalactites can be found with the addition or a noticeable amount of iron.
If the formation appears to be primarily made of iron or iron oxides, or is not a stalactite, it is best to inventory it as a rusticle. If it appears to be iron oxide over or in a more ordinary stalactite, it is better to inventory it as an iron stalactite.
See also
References
- Burger, Paul; description of the distinctions between rusticles and iron stalactites
