The Coniacian is a stage in the geological time scale that occurred during the Late Cretaceous period, approximately 89 to 86 million years ago. It is characterized by specific fossil records and sedimentary deposits that help geologists understand the Earth's history during this time. The Coniacian follows the Santonian stage and precedes the Turonian stage. During the Coniacian, the climate was generally warm, and the seas were rich in marine life. Fossils from this period include various species of ammonites and bivalves, which provide insights into the biodiversity and ecological conditions of the time. The Coniacian is significant for studying the evolution of life on Earth and the changes in sea levels.