Provenance (geology) Provenance (geology) Provenance in geology, is the reconstruction of the origin of sediments. The Earth is a dynamic planet, and all rocks are subject to transition between the three main rock types: sedimentary, metamorphic, and igneous rocks (the rock cycle). Rocks exposed to the surface are sooner or later broken down into sediments. Sediments are expected to be able to provide evidence of the erosion history of their parent source rocks. The purpose of provenance study is to restore the tectonic, paleo-geographic and paleo-climatic history. In the modern geological lexicon, "sediment provenance" specifically refers to the application of compositional analyses
International Convention Relating to Intervention on the High Seas in Cases of Oil Pollution Casualties 1969 entering into force in 1975. In 1973 the Protocol relating to Intervention on the High Seas in Cases of Marine Pollution by Substances other than Oil was adopted extending the provision of the 1969 Convention to other hazardous substances. The list of hazardous substances covered by Protocol was amended and extended in 1991, 1996 and 2002. As of October 2016, the convention has 89 state parties. The Convention applies to all seagoing vessels except warships or other vessels owned or operated by a State and used on Government non-commercial service. While exercising the right to take measures "necessary to