Topic: varve

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varve

The Columbia Encyclopedia, Sixth Edition
varve in geology, pair of thin sedimentary layers formed annually by seasonal climatic changes. Usually found in glacial lake deposits, varves consist of a coarse-grained, light-colored summer deposit and a finer-grained, dark-colored winter deposit formed when fine sediment settles out from the water under the ice cover. Varves, and the pollen they contain, are useful for interpreting recent climatic history. Author not available, VARVE. , The Columbia Encyclopedia, Sixth Edition 2007 ... Read more
dating
The Columbia Encyclopedia, Sixth Edition ... climatic variations, such as tree rings (dendrochronology) and varve analysis. After 1950, the physical sciences contributed a number ... resulting in luminescence. When light is used rather than heat to free the accumulated electrons, the technique is known as optically ... Read more
varved deposit
Britannica Concise Encyclopedia Any form of repetitive sedimentary rock stratification that was deposited within a year. This annual deposit usually consists of paired contrasting layers (varves) of alternately finer (darker) and coarser (lighter) silt or clay, reflecting seasonal variations in sedimentation (winter and summer) Read more

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