Deciphering Earth’s secrets
Faults on geological maps are far more than just lines; they are a critical form of communication, conveying essential information about the Earth’s subsurface structure and tectonic history. Central to…
Molly Turko
Is it a true conjugate fracture set?
Conjugate faults or fractures are a set of shear fractures that formed simultaneously under the same stress conditions. According to Andersonian Fault Theory, this could involve a series of left-lateral…
Horsetail splays, wing cracks, and splay faults
These funny faults go by several names, but traditionally refer to the secondary faults and fractures that develop near the tips of a primary fault. Although these can occur on…
Strike-slip kinematics for pop-ups and pull-aparts
Pop-ups and pull-aparts, releasing- and restraining-bends, positive- and negative-flower structures. These are the various names given to the little, and big, structures that develop along strike-slip faults. They often form…
Who’s Andy? And what did he know about faults?
Anderson’s theory classified faults based on the orientation and magnitude of the principle stresses. The magnitudes are defined by S1 (maximum stress), S2 (intermediate stress) and S3 (minimum stress). The…