Torridonian
/ˌtɒrɪˈdəʊnɪən/adjective
1- Geology of, relating to, or denoting the later stage of the Proterozoic aeon in NW Scotland, from about 1,100 to 600 million years ago【地质】（与）托里东（有关）的; （与）苏格兰西北部元古宙后期（有关）的。
1.1
- as noun the Torridonian this period, or the system of rocks deposited during it托里东期; （岩石的）托里东组。
词源
late 19th cent.: from the name of Loch Torridon, in NW Scotland, + -IAN.