fissures

plural of fissure
as in crevices
an irregular usually narrow break in a surface created by pressure lava flows up through a fissure in the earth's crust

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“Fissures.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/fissures. Accessed 27 May. 2024.

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