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3 votes
Bioherms are made of _____.

sand, silt, and clay
algae, corals, and shells
carbonic acid and limestone
layers of evaporated salt

2 Answers

6 votes

Algae, corals, and shells. Hope this helps

User Fthr
by
7.6k points
5 votes
algae, corals, and shells
User Washington Botelho
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8.4k points