History of Derry of the Troubles". On Sunday January 30, 1972, 13 unarmed civilians were shot dead by British paratroopers during a civil rights march in the Bogside area. Another 13 were wounded and one further man later died of his wounds. This event came to be known as Bloody Sunday. Because of these events, certain areas of Derry produced strong support for republican paramilitaries. Up to 1972, both the Provisional Irish Republican Army and Official IRA operated in the city. However, in 1972 the OIRA called a ceasefire following their unpopular killing a local 18-year-old who was on leave from the British
Carnian Pluvial Event of Southern Italy that was probably caused by the rise of the Carbonate Compensation Depth (CCD). High extinction rates occurred among ammonoids, conodonts, bryozoa, and crinoids. Major evolutionary innovations followed the CPE, as the first occurrence of dinosaurs, lepidosaurs, an expansion of coniferous trees, calcareous nannofossils and scleractinian corals. The Carnian Pluvial Event (CPE) is sometimes called the Carnian Pluvial Episode and is also known as "Reingrabener Wende" (meaning Reingrabener turnover), or "Raibl event". The arid climate of the Late Triassic was interrupted by the markedly more humid conditions of the Carnian Pluvial Event (CPE). Evidences of increased rainfall during