Earthquakes may cause landslips to dam rivers, which collapse and cause floods. Infrequent natural hazards include earthquakes, landslips, and hurricanes. The torrential rain caused over 200 cases of flooding and many landslips. The following table shows a list (not yet complete) of landslides/landslips that have occurred. The whole area is subject to coastal erosion, landslips and path closures. Post-glacial features include peat and landslips. This has a number of weirdly shaped rock pinnacles, the remnants of ancient landslips. Mining activity has reactivated ancient landslips in certain cases. There are three landslips on the north-facing river cliff of the Blackwater at Maldon. The inner walls are terraced and contain many signs of landslips. Some landslips continued to occur, causing withdrawals of emergency personnel. The rim of Theophilus has a wide, terraced inner surface that shows indications of landslips. This action caused many large-scale landslips, most notably around Shaftesbury and Abbotsbury. In 2011 the gorge was closed after several massive landslips. Several were killed by the landslips.