Constructing structure contours on a planar surface

In geology we draw structure contours (aka strike lines) on geological surfaces to illustrate their 3D shape. This is an introduction to the geometry and construction of structure contours on a planar geological surface, using map-patterns. Part of "The Shear Zone" video channel. A copy of the map is available on the Shear Zone website (see link from Channel home page).

[@talathussain5078]

Thank you so much Sir. I try to watch every video you posted or will post. I am learning,immensely.

[@robbutler2095]

Thanks - glad they're useful for you...

[@talathussain5078]

@@robbutler2095 My pleasure Sir.

[@tom-uo1ov]

Thank you!

[@ophiolit]

Круто! Почему нет комментариев от благодарных студентов?

[@ophiolit]

Why are there no comments from grateful students?

[@dill7260]

I am grateful student comrade