fault cros citting sedimentary rock Photograph of faulted sedimentary rock layers exposed in a roadcut in Guatemala. The sedimentary rocks originally were deposited as horizontal layers of sand and gravel in streams and debris flows. After their deposition, the consolidated sediment was broken by a moderately-dipping normal-slip fault that has dropped layers left of the fault down about 3 meters relative to layers to the right;
This is a fun activity the teacher can use when talking about natural disasters (particularly earthquakes) and how they lead to the formation of landforms. This is a cool, engaging activity (involving food) that would be appropriate for students of many ages.
Faults are breaks along which rocks move at different rates, pushed by the pressure of other rocks moving. Some faults are very short, others are hundreds of miles in length. These layers show the amount of relative offset (movement) between two sides, plus a teeny geologist at lower right.