nˈiːdəl ˈaɪs: ˈɪnfɪltɹˌeɪɾɪŋ wˈɔːɾɚ ðæt fɹˈiːzᵻz wɪðˌɪn ðə bˈɛdɹɑːk kæn sˈʌmtaɪmz biː fˈoːɹst ˌɪntʊ ðə kˈeɪv pˈæsɪdʒ.
Needle ice: Infiltrating water that freezes within the bedrock can sometimes be forced into the cave passage.