ɪɾ ˈoʊpənd æz ðə pɹˈoʊɾoʊtˈɛθiz ˈoʊʃən sˈʌbdʌktᵻd ˌʌndɚ ðiːz tˈɛɹeɪnz ænd klˈoʊzd æz ðə sɪmˈɪɹiən tˈɛɹeɪnz ðæt ˈɔːlsoʊ bɹˈoʊkˈɔf ɡəndwˈɑːnə ænd mˈuːvd nˈɔːɹθ ɡˈeɪv wˈeɪ tə ðə tˈɛθiz ˈoʊʃən.
It opened as the Proto-Tethys Ocean subducted under these terranes and closed as the Cimmerian terranes (that also broke-off Gondwana and moved north) gave way to the Tethys Ocean.