I'm building a new planet up from scratch, and wanted to get a sanity check on my plate tectonics and land masses. It doesn't have to be 100% realistic, but I'd like it to be plausible to someone who knows what they're looking at.
- Diagram shows two hemispheres of a globe.
- Plate boundaries are outlined in grey, and labeled with letters (A-J), with arrows for their general movement direction.
- Continents are outlined in green; other areas are assumed to be ocean (there are 4 major continents - AB, FJ, C, and HI.
- Primary Mountain ranges are indicated in red.
- Earthquake/volcanic activity regions are indicated in purple.
- Islands/archipelagos are indicated in yellow.
- The planet is roughly earth-like in composition, age, and size.
- The coastlines are not set yet, this is just the preliminary shape of the land masses.
- I'm not set on any particular configuration, if there's a need to scrap elements of the sketch.
Desired Answer A good answer will suggest improvements or revisions to the sketch to make the planet more realistic, based on your knowledge of geology and plate tectonics. Also appreciated are recommendations that aren't necessary for this sketch, but could be implemented in future undertakings, or things to keep in mind going forward, i.e. how the coastlines would be affected by their formation.
Prior Research and Uncertainties The concept sketch is based on my understanding of geology, several blogs (particularly this WorldbuildingWorkshop post) and articles on worldbuilding via tectonics, as well as reading through the relevant forum posts on this site. I couldn't find any information on how Hadley cells work near the poles, so those plates' motion is where I'm least confident. Also I'm unsure what features would form when plates are moving roughly parallel, as in the D-F plate border.
First-time poster, thanks very much for your advice!