Horse (geology)
Appearance
![](http://upload.wikimedia.org/wikipedia/commons/thumb/c/cc/Duplex1.png/300px-Duplex1.png)
![](http://upload.wikimedia.org/wikipedia/en/thumb/2/2c/Geologic_horse.jpg/300px-Geologic_horse.jpg)
A horse, in geology, is any block of rock completely separated from the surrounding rock either by mineral veins or fault planes. In mining, a horse is a block of country rock entirely encased within a mineral lode.[1] In structural geology the term was first used to describe the thrust-bounded imbricates found within a thrust duplex.[2] In later literature it has become a general term for any block entirely bounded by faults, whether the overall deformation type is contractional, extensional or strike-slip in nature.[3][4]
References
- ^ Butler, F.H. 1911. The brecciation of mineral veins.
- ^ Dennis, J.G. 1967. International tectonic dictionary. AAPG Memoir 7, 196pp.
- ^ Root, K.G. 1990. Extensional duplex in the Purcell Mountains of southeastern British Columbia. Geology, 18, 419-421
- ^ Laney, Stephen E; Gates, Alexander E (1996), "Three-dimensional shuffling of horses in a strike-slip duplex: an example from the Lambertville sill, New Jersey", Tectonophysics, 258 (1–4): 53–70, Bibcode:1996Tectp.258...53L, doi:10.1016/0040-1951(95)00173-5
External links
- New International Encyclopedia. 1905. .