Map lichen is a lichen widely used by climatologists to determine the relative age of deposits. As an example, they might use it in a moraine systems, to tell how long a rock has been exposed. With this they can also tell about glacial advances. The process is called lichenometry.
m æ p WORD_BOUNDARY l aɪ k ə n WORD_BOUNDARY ɪ z WORD_BOUNDARY ʌ WORD_BOUNDARY l aɪ k ə n WORD_BOUNDARY w aɪ d l i WORD_BOUNDARY j uː z d WORD_BOUNDARY b aɪ WORD_BOUNDARY k l aɪ m ʌ t ɑ l ə d̠ʒ ɪ s t s WORD_BOUNDARY t ə WORD_BOUNDARY d ɪ t ɜː m ɪ n WORD_BOUNDARY ð ə WORD_BOUNDARY ɹ ɛ l ə t ɪ v WORD_BOUNDARY eɪ d̠ʒ WORD_BOUNDARY ʌ v WORD_BOUNDARY d ɪ p ɑ z ɪ t s WORD_BOUNDARY æ z WORD_BOUNDARY ʌ n WORD_BOUNDARY ɛ ɡ z æ m p ə l WORD_BOUNDARY ð eɪ WORD_BOUNDARY m aɪ t WORD_BOUNDARY j uː z WORD_BOUNDARY ɪ t WORD_BOUNDARY ɪ n WORD_BOUNDARY ʌ WORD_BOUNDARY m ə ɹ ɹ eɪ n WORD_BOUNDARY s ɪ s t ə m z WORD_BOUNDARY t ə WORD_BOUNDARY t ɛ l WORD_BOUNDARY h aʊ WORD_BOUNDARY l ɔ ŋ WORD_BOUNDARY ʌ WORD_BOUNDARY ɹ ɑ k WORD_BOUNDARY h æ z b iː n WORD_BOUNDARY ɛ k s p oʊ z d WORD_BOUNDARY w ɪ ð WORD_BOUNDARY ð ɪ s WORD_BOUNDARY ð eɪ WORD_BOUNDARY k æ n WORD_BOUNDARY ɔ l s oʊ WORD_BOUNDARY t ɛ l WORD_BOUNDARY ʌ b aʊ t WORD_BOUNDARY ɡ l eɪ ʃ ə l WORD_BOUNDARY ʌ d v æ n s ɪ z WORD_BOUNDARY ð ə WORD_BOUNDARY p ɹ ɑ s ɛ s WORD_BOUNDARY ɪ z WORD_BOUNDARY k ɔ l d WORD_BOUNDARY l ɪ t̠ʃ ə n ɑ m ə t ɹ i WORD_BOUNDARY