Trees like the Bristlecone pine and the Giant Sequoias have rings that “date” as old as the Flood. The oldest Sequoia tree has rings that date it about 3,266 years old; the oldest Bristlecone is about 4,844 years old (using a one-ring-per-year counting method).[i] Also, several studies have established that trees can (and do) grow more than one ring per year.[ii] Some dendrochronologies reach toward 10,000 years. To build these, workers place individual tree-based chronologies end-to-end toward the past in an effort to fill in imagined evolutionary time.
[i] See: Sequoia Research: www.nps.gov/yose/learn/nature/sequoia-research.htm (November 5, 2018).
[ii] See: https://answersingenesis.org/age-of-the-earth/do-varves-tree-rings-radiocarbon-measurements-prove-old-earth/ and www.icr.org/article/8050 (November 5, 2018).