Figure 4. Jaw crusher stage with a screen in the grizzly by pass to extract a 0 90 mm product. Figure 5. Jaw crusher stage with a screen that process all material and allows for production of 0 30 mm, 0 60 mm or 0‑90 mm. Figure 6. The rock size varies in the muck pile, as seen in the picture the number of large rocks is far greater on the.