The cave formed prior to 5.7 ±1.09 Ma based in cosmogenic radionuclide dating of pebbles washed into the Muster Ground room.
ðə kˈeɪv fˈɔːɹmd pɹˈaɪɚ tə fˈaɪv.sˈɛvən plˈʌs ɔːɹ mˈaɪnəs wˈʌn.zˈiəɹoʊ nˈaɪn mˈɑː bˈeɪst ɪn kˌɑːzmoʊdʒˈɛnɪk ɹˌeɪdɪoʊnˈuːklaɪd dˈeɪɾɪŋ ʌv pˈɛbəlz wˈɑːʃt ˌɪntʊ ðə mˈʌstɚ ɡɹˈaʊnd ɹˈuːm.