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<br />. <br /> <br />OflfjSClB <br /> <br />. <br /> <br />. <br /> <br />Long-term precipitation variation at Mesa Verde National Park has been <br /> <br /> <br />studied on the basis of tree-ring chronologies for the period of 740 A.D. to the <br /> <br /> <br />present. The period of 1905 through 1929 was considered to be unusually moist, <br /> <br /> <br />with normal to somewhat dry conditions occurring thereafter. The 1951 through <br /> <br /> <br />1980 study period fell in a generally intermediate precipitation range based <br /> <br /> <br />on the tree-ring studies and was neither unusually moist nor unusually dry. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />-12- <br /> <br />. <br />