Reference Terms
from Wikipedia, the free encyclopedia

Annual sedimentary layer

A varve is an annual layer of sediment or sedimentary rock.

Terms such as "annually laminated" are synonymous with varve.

Of the many rhythmites found in the geological record, varves are one of the most important and illuminating to studies of past climate change.

Varves are amongst the smallest-scale events recognised in stratigraphy.

Note:   The above text is excerpted from the Wikipedia article "Annual sedimentary layer", which has been released under the GNU Free Documentation License.
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