How far back can we get dates using dendrochronology Dendrochronology tree

How far back can we get dates using dendrochronology

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25. How far back can we get dates using dendrochronology? 26. The two best absolute dating techniques are C14 and K40. There is a gap between the oldest material that can be dated with C14 and the youngest that can be dated with K40. What age materials fall in that gap?27. What are index fossils? How can biostratigraphy be used to assign a dateto some material? 28. How are magnetic reversals useful in obtaining dates for fossil material?
Lecture 11. 1. When do first primates first appear in the fossil record. What major feeding niche first emerged at that time? 2. At what time period do the first anthropoids appear in the fossil record? 3. What time period do the first apes show up in the fossil record, and when do most ape species go extinct?

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