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NOAA's World Data Service for Paleoclimatology archives this tree ring dataset from Mountain Lake, Newfoundland, Canada. It provides a chronology covering 194 calendar years, from 156 to -38 years before present. The data were collected and published by Schweingruber and last updated in 1988.
Time notation uses calendar years before present (BP); users must understand the BP dating convention. Citation of the original study (Schweingruber) is required when using the data.