thrust fault

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A reverse fault in which the fault plane is inclined at an angle equal to or less than 45°.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun geology A type of reverse fault in which the angle that the hanging wall makes with the horizontal is less than 45 degrees.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a geological fault in which the upper side appears to have been pushed upward by compression