Definition of Neogene in US English:



  • 1Relating to or denoting the later division of the Tertiary period, comprising the Miocene and Pliocene epochs.

    The Neogene lasted from about 23 million to 1.6 million years ago. The mammals continued to evolve during this time, developing into the forms that are familiar today

    • ‘The Pliocene is today defined as the later epoch of the Neogene period, between 1.8 and 5.3 Ma.’
    • ‘In contrast, the west side of the basin is marked by a relatively linear contact between uplifted Neogene sedimentary rocks and Quaternary alluvium.’
    • ‘They reveal late Cretaceous and Neogene geothermal gradients that were comparable with that at the present day, i.e. no significant increase in basal heat flow.’
    • ‘The hole penetrated 366 m of Lower Pleistocene and Neogene hemipelagic deposits, and terminated in the uppermost Miocene.’
    • ‘The preserved Miocene sediments have allowed us to separate the effects of Palaeogene and Neogene uplift.’
    1. 1.1as noun the Neogene The Neogene subperiod or the system of rocks deposited during it.


Late 19th century: from neo- ‘new’ + Greek -genēs ‘born, of a specified kind’ (see -gen).