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
Up to Now (autobiography) relating to other prominent figures such as the British statesman Viscount Grey. Shaw's book was the first of two autobiographies published in 1929 with the title "Up to Now". The second was by the American politician and four-time Governor of New York, Al Smith. As "The Times Literary Supplement" pointed out, the title promised more to come, but although Shaw lived on for another thirty years, he never published a sequel. In the late 20th and early 21st centuries, "Up to Now" continued to be used as a source for biographical works on Gordon Craig, Isadora Duncan and Ellen Terry.