A guide to some common symbols found on geologic maps. Includes strike and dip, vertical strata, horizontal strata, anticline axis, syncline axis, plunging anticline axis, plunging syncline axis, and strike-slip fault. For more details and symbols, see the FGDC Digital Cartographic Standard for
Geologic Map Symbolization at the official website
https://ung.edu/university-press/books/laboratory-manual-for-introductory-geology.php
CrunchyRocks, after Randa Harris