New American Oxford Dictionary
Sub-Boreal
Sub-Bo re al ▶adjective Geology of, relating to, or denoting the fourth climatic stage of the postglacial period in northern Europe, between the Atlantic and Sub-Atlantic stages (about 5,000 to 2,800 years ago ). The stage corresponds to the Neolithic period and Bronze Age, and the climate was cooler and drier than previously but still warmer than today. • (as noun the Sub-Boreal ) the Sub-Boreal climatic stage.
Oxford Dictionary
Sub-Boreal
Sub-Boreal |ˈbɔːrɪəl | ▶adjective Geology relating to or denoting the fourth climatic stage of the postglacial period in northern Europe, between the Atlantic and Sub-Atlantic stages (about 5,000 to 2,800 years ago ). The stage corresponds to the Neolithic period and Bronze Age, and the climate was cooler and drier than previously but still warmer than today. • (as noun the Sub-Boreal ) the Sub-Boreal climatic stage.