On the west coast, as early as the 13th century, the Tongva, Luiseño and Chumash peoples collected the naturally occurring bitumen that seeped to the surface above underlying petroleum deposits.
ɔnðə wˈɛst kˈoʊst, æz ˈɜːli æz ðə θˈɜːtiːnθ sˈɛntʃɚɹi, ðə tˈɑːŋvə, ljuːˈaɪsnjoʊ ænd tʃˈuːmæʃ pˈiːpəlz kəlˈɛktᵻd ðə nˈætʃɚɹəli əkˈɜːɹɪŋ bɪtˈuːmɛn ðæt sˈiːpt tə ðə sˈɜːfɪs əbˌʌv ˌʌndɚlˈaɪɪŋ pətɹˈoʊliːəm dᵻpˈɑːzɪts.