The River Axe is a river in South West England. The river is formed by water entering swallets in the limestone and rises from the ground at Wookey Hole Caves in the Mendip Hills in Somerset, and runs through a V-shaped valley. The geology of the area is limestone and the water reaches Wookey Hole in a series of underground channels that have eroded through the soluble limestone. The river mouth is in Weston Bay on the Bristol Channel. The river was navigable from the middle ages until 1915, during early centuries of which seeing some European trade. Geography The River Axe is formed by the water entering the cave systems and flows through the third and first chambers, from which it flows to the resurgence, through two sumps and long, where it leaves the cave and enters the open air. It is the second largest resurgence on Mendip, with an estimated catchment area of , and an average discharge of per second. Some of the water is allogenic in origin i.e. drained off non-limestone rocks, collecting as streams on the surface before sinking at or near the Lower Limestone Shale — Black Rock Limestone boundary, often through swallets. One such is Plantation Swallet near St Cuthbert's lead works, between the Hunter's Lodge Inn and Priddy Pools. It then passes through major cave systems such as Swildon's Hole, Eastwater Cavern and St Cuthbert's Swallet, around Priddy, but 95% is water that has percolated directly into the limestone. From Wookey Hole village the river flows through a ravine and then west through the village of Wookey. There the river bifurcates: the ‘Lower River Axe’ runs more southerly, towards Henton onto Panborough Moor where it joins a series of rhynes and drains supplying water to local seasonal and perennial wetland, afterwards running north along the westernmost edge of Knowle Moor whilst the Axe proper continues west through the same moor. The two meet, to reunite, where Knowle and Panborough Moors meet. The river then continues northwest past Wedmore Moor and through Oxmoor, Stoke Moor and Monk Moor. The river passes through the settlement of Lower Weare and on to the south of Loxton. From this point until it passes between Uphill Cliff and Brean Down, then reaches the coast at Weston Bay, the river demarcates Sedgemoor from North Somerset. Tributaries of the Axe include three rivers called Yeo: the Cheddar Yeo, the