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.
The causes of landslides are usually related to instabilities in slopes. It is usually possible to identify one or more landslide causes and one landslide trigger. The difference between these two concepts is subtle but important. The landslide causes are the reasons that a landslide occurred in that location and at that time. Landslide causes are listed in the following table, and include geological factors, morphological factors, physical factors and factors associated with human activity.