Pleistocene The lower boundary of the Pleistocene Series is formally defined magnetostratigraphically as the base of the Matuyama (C2r) chronozone, isotopic stage 103. Above this point there are notable extinctions of the calcareous nanofossils: "Discoaster pentaradiatus" and "Discoaster surculus". The Pleistocene covers the recent period of repeated glaciations. The name Plio-Pleistocene has, in the past, been used to mean the last ice age. The revised definition of the Quaternary, by pushing back the start date of the Pleistocene to 2.58 Ma, results in the inclusion of all the recent repeated glaciations within the Pleistocene. The modern continents were essentially at their
Video film era Video film era The Video film era, also known as the home video era, is a period in Nigerian cinema, typically from the late 1980s/early 1990s to mid 2010s, when Nigerian films were made using affordable video format. The video boom era emerged after the downturn of the Golden era of the Nigerian cinema in the late 1980s. The term "Home video" stems from the concept of staying at home to watch the films, in contrast to films of the Golden Age which were watched at the movie theatres. The beginnings of the video film market in Nigeria is traced