Horst

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horst

[hȯrst]
(geology)
A block of the earth's crust uplifted along faults relative to the rocks on either side.
A mass of the earth's crust limited by faults and standing in relief.
One of the older mountain masses limiting the Alps on the west and north.
A knobby ledge of limestone beneath a thin soil mantle.

Horst

 

an area of the earth’s crust that is elevated above adjacent areas and is usually elongated. It is bordered by steeply dipping fractures—faults or upthrow faults. Horsts vary in size; they may be dozens of kilometers across and hundreds of kilometers long.