In geology and oceanography, diagenesis is any chemical, physical, or biological change undergone by a sediment after its initial deposition and during and after its lithification, exclusive of surface alteration (weathering) and metamorphism. These changes happen at relatively low temperatures and pressures and result in changes to the rock's original mineralogy and texture. There is no sharp boundary between diagenesis and metamorphism, but the latter occurs at higher temperature and pressure than the former.

After deposition, sediments are compacted as they are buried beneath successive layers of sediment and cemented by minerals that precipitate from solution. Grains of sediment, rock fragments and fossils can be replaced by other minerals during diagenesis. Porosity usually decreases during diagenesis, except in rare cases such as dissolution of minerals and dolomitization.

The study of diagenesis in rocks is used to understand the tectonic history they have undergone; the nature and type of fluids that have circulated through them. From a commercial standpoint, such studies aid in assessing the likelihood of finding various economically viable mineral and hydrocarbon deposits.

Lorine Faith Niedecker (English: pronounced Needecker) (May 12, 1903 – December 31, 1970) was a Wisconsin poet and the only woman associated with the Objectivist poets. She is widely credited for demonstrating how an Objectivist poetic could handle the personal as subject matter.

Niedecker was born on Black Hawk Island near Fort Atkinson, Wisconsin to Theresa (Daisy) Kunz and Henry Niedecker and lived most of her life in rural isolation. She grew up surrounded by the sights and sounds of the river until she moved to Fort Atkinson to attend school. This world of birds, trees, water and marsh was to inform her poetry for the rest of her life. On graduating from high school in 1922, she went to Beloit College to study literature but left after two years because her father was no longer able to pay her tuition. She devoted herself to caring for her ailing deaf mother, who was deeply depressed by her husband's flagrant affair with a neighbor woman. Niedecker married Frank Hartwig in 1928 but this relationship lasted only two years. Hartwig's fledgling road construction business foundered during the onset of the Great Depression while Lorine lost her job at the Fort Atkinson Library. The two separated in 1930 but were not legally divorced until 1942.

Sir Harrison Paul Birtwistle CH (born 15 July 1934) is a British contemporary composer.

Birtwistle was born in Accrington, a mill town in Lancashire some 20 miles north of Manchester. His interest in music was encouraged by his mother, who bought him a clarinet when he was seven, and arranged for him to have lessons with the local bandmaster. He became proficient enough to play in the local military-style band, and also played in the orchestra which accompanied Gilbert and Sullivan productions and the local choral society's performances of Messiah. Birtwistle composed from around this time, later describing his early pieces as 'sub Vaughan Williams'.

In 1952 he entered the Royal Manchester College of Music in Manchester on a clarinet scholarship. While there he met fellow composers Peter Maxwell Davies and Alexander Goehr, who, together with pianist John Ogdon and conductor Elgar Howarth, formed the New Music Manchester group, dedicated to the performances of serial and other modern works.