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Block of rock completely surrounded by mineral veins or fault planes
Diagram showing development of thrust-bounded horses within a thrust duplex
A horse sits between the walls of this
normal fault located near
Upheaval Dome ,
Utah . The
fault plane traces from the upper right to the lower left of the image. The horse is the broad lens-shaped feature in the rock defined by the splitting and rejoining of the trace of the fault plane.
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