Shask wrote:Edit: I'm in one of the new supergrids, could this be why? Like it hasn't been created in the new grids?
Probably not. Another thing to look for is mud flats (big brown spots on the map). You can find acre clay in those.
Sometimes it can seem unreasonably difficult to find clay depending on where you're at, but they're usually not that uncommon. A lot of resources go overlooked.
Edit: And if you're really desperate get your Perception and Exploration up and you can start seeing grey clay along the water edge (best in lakes). At full industry you're guaranteed to get 2 clay per harvest which does add up.