Earth Structure - A synformal-anticline (d) or an antiformal-anticline (a)? A recent LinkedIn post, while technically correct, reminded me of geology's penchant for arcane terminology. How about just anticline and syncline for
![Reflection seismic line across the Réchésy anticline (modified from... | Download Scientific Diagram Reflection seismic line across the Réchésy anticline (modified from... | Download Scientific Diagram](https://www.researchgate.net/publication/225594231/figure/fig5/AS:671512243761164@1537112403541/Reflection-seismic-line-across-the-Rechesy-anticline-modified-from-Ustaszewski-et-al.png)
Reflection seismic line across the Réchésy anticline (modified from... | Download Scientific Diagram
![Eroded anticline, they are arch-shaped folds in which rock layers are upwardly convex and eroded, vintage line drawing or engraving illustration Stock Vector Image & Art - Alamy Eroded anticline, they are arch-shaped folds in which rock layers are upwardly convex and eroded, vintage line drawing or engraving illustration Stock Vector Image & Art - Alamy](https://c8.alamy.com/comp/2BTGK3H/eroded-anticline-they-are-arch-shaped-folds-in-which-rock-layers-are-upwardly-convex-and-eroded-vintage-line-drawing-or-engraving-illustration-2BTGK3H.jpg)