Definition of flowstone
: calcite deposited by a thin sheet of flowing water usually along the walls or floor of a cave
Recent Examples of flowstone from the Web
Two labs independently showed that the flowstone was about 236,000 years old, meaning that the underlying H. naledi remains had to be older.
Getting a maximum age proved trickier; no flowstone sandwiched the fossils from below.
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First Known Use of flowstone
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