Terminology (Leaving Cert DCG): Flashcards

Layer of rock treated as inclined plane with uniform thickness

Top surface of the stratum

Lower surface of the stratum

Perpendicular distance between headwall and footwall

Portion of stratum visible at Earth's surface

Bearing of a level line on stratum surface (horizontal)

Angle stratum makes with horizontal plane

Hole drilled from surface through stratum

Perpendicular to surfaces, not along slope

Headwall is always above footwall