The ABCDE rule can be used to help you remember what a melanoma tumor typically looks like: 1  Asymmetry: The shape of one half of the mole does not match the other. 2  Border: The edges are ragged, notched, or blurred. 3  Color: The color is often uneven. Shades of black, brown, and tan may be present.
Landslides occur regularly in a variety of landscapes across every Australian State and Territory. These landscapes are commonly characterised by cliffs, steep slopes of colluvium deposits or gentle slopes of unstable geology and slopes which have been subjected to periods of prolonged or intense rainfall.
1. Landslides and Landslide Susceptibility. Landslides are caused when the force of gravity pulls rock, debris or soil down a slope. They are one of the forms of erosion called mass wasting, which is broadly defined as erosion involving gravity as the agent causing movement.hen a potential hazard is present in the study area, the first step is to undertake a brief survey to establish whether landslides have occurred in recent times. Roads, railroads, and river banks are good sites for seeking signs of past landslide occurrence.