what causes rock layers to tilt or incline?

Answer 1

Plate tectonics, earthquakes ...

http://www.google.com/search?q=plate+tectonics&biw=1440&bih=718&tbm=isch&imgil=bSZ-j7Vj7xxI1M%253A%253B63PsD3Mc70OaIM%253Bhttp%25253A%25252F%25252Fen.wikipedia.org%25252Fwiki%25252FPlate_tectonics&source=iu&pf=m&fir=bSZ-j7Vj7xxI1M%253A%252C63PsD3Mc70OaIM%252C_&usg=__b6HJHEz5NJnWLvOOKDEMRi-rEZQ%3D&ved=0CCUQyjc&ei=patXVZTiI4XdsAWKoYGwBg#imgrc=bSZ-j7Vj7xxI1M%253A%3B63PsD3Mc70OaIM%3Bhttp%253A%252F%252Fupload.wikimedia.org%252Fwikipedia%252Fcommons%252F4%252F40%252FTectonic_plate_boundaries.png%3Bhttp%253A%252F%252Fen.wikipedia.org%252Fwiki%252FPlate_tectonics%3B775%3B429

Answer 2

Tectonic activity.

http://www.ehow.com/info_12141180_causes-geologic-tilting.html

Answer 3

what about volcano activity isn't it caused tilting?

Answer 4

http://geomaps.wr.usgs.gov/parks/province/pacifmt.html