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Table 3.1 Landslide Events Per CountyTable 3.2 Landslide Events – MaterialsThe next biggest category is those involving mineral soils - debris – coarse-grained soils dominated by gravelgrade or larger. There were 31 of these. For many there is little information as to the precise nature of the debrismaterials, but many would be derived from glacial tills, sands and gravels, or other diamicts which mantle thehillslopes in Ireland. In addition there are 4 events for which the material can be more precisely defined asglacial till rather than the more general term “debris”. Mud, that is wet, fine-grained soil, is found at 2 locations,both on the Coast Road in Co. Antrim. Other mudflows on this stretch of the Coast Road have yet to bedocumented in the database. There are 8 rockfalls or rock topples listed so far. The recent study in the Breifnearea (see Chapter 5) has identified many rockfalls which have yet to be entered into the database. Of the totalof 117 only 8 are left as yet unspecified with regard to the type of material or mechanism involved.The historical record of the dates of occurrence is also interesting. This is shown in Fig. 3.3. The greaternumber shown in the 20 th Century will to some extent reflect better record keeping and reporting. It probablyalso indicates a real increase in the frequency of landslide events. There have been 14 events recorded in thecurrent century so far.14