The term "κρητιδικού" refers to a specific geological period within the Cretaceous era, which lasted from approximately 145 to 66 million years ago. This period is characterized by significant geological and biological changes, including the dominance of dinosaurs and the emergence of flowering plants. During the Cretaceous, the Earth's continents were positioned differently than today, leading to diverse ecosystems. The period ended with a mass extinction event, likely caused by an asteroid impact, which led to the extinction of many species, including the dinosaurs, paving the way for the rise of mammals in subsequent periods.