Patent ID: 8393086

Claim:
An apparatus for measuring trend and plunge, the apparatus comprising: a rod operable to be disposed parallel to a geologic lineation; a rotation block connected to one end of the rod and mounted to rotate around an imaginary central longitudinal axis of the rod, the rotation block includes a hinge shaft extending in a direction perpendicular to the imaginary central longitudinal axis; a plate coupled to the hinge shaft of the rotation block so that the plate is operable to rotate around the hinge shaft; a protractor disposed on the hinge shaft, the protractor being configured to confirm an angle between the rotation block and the plate, thereby being operable to measure trend of a geologic line feature when the plate is horizontally disposed; and a measuring unit disposed on the plate, the measuring unit comprising a compass configured to measure a direction of the rod, thereby being operable to measure trend when the plate is horizontally disposed.