An example of this is within the Uinta Basin of Utah, in the US, where there is a swarm of laterally and vertically extensive veins composed of a solid hydrocarbon termed Gilsonite.
ɐn ɛɡzˈæmpəl ʌv ðɪs ɪz wɪðˌɪn ðə jˈuːɪntə bˈeɪsən ʌv jˈuːtɔ, ɪnðə jˌuːˈɛs, wˌɛɹ ðɛɹ ɪz ɐ swˈɔːɹm ʌv lˈæɾɚɹəli ænd vˈɜːɾɪkli ɛkstˈɛnsɪv vˈeɪnz kəmpˈoʊzd əvə sˈɑːlɪd hˈaɪdɹəkˌɑːɹbən tˈɜːmd ɡˈɪlsənˌaɪt.