41. Ten miles away, they even found three-toed dinosaur footprints preserved in a 130-million-year-old mud flat . 42. As a result, extensive mud flats are deposited throughout the tidal range of the rivers. 43. Phineas Banning excavated a channel out of the mud flats of San Pedro using federal dollars. 44. Greater flamingoes also breed on the mud flats . 45. This means during low tide much of the harbour is mud flats and exposed sand bars. 46. A walking trail takes visitors through grasslands; visitors also can roam sand dunes and mud flats . 47. Ships could dock safely away from the mud flats in what was effectively a tidal basin. 48. Some winter in Bay marshes and mud flats . 49. The paddle tips still occasionally struck the mud flat , now only several inches below the surface. 50. Approximately 40 % of Western Port total area is exposed as mud flats at low tide.