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Cross dating in dendrochronology douglass

On October 18, 1916, University President Rufus von Klein Smid announced that an anonymous donor had given the University US,000 "...to be used to buy a telescope of huge size"; the donor was later revealed to be Mrs.The student learns many facts and has much training.He can only dimly see which fact and which training will be of eminent use to him, but some special part of his education will take root in him and grow and pay for all of the effort which he and his friends have put into it. In this Observatory I sincerely hope and expect that the boundaries of human knowledge will be advanced along astronomical lines.He started his discoveries in this field in 1894 when he was working at the Lowell Observatory.

Douglass continued comparing samples between the two sites and concluded Pueblo Bonito actually predated Aztec Ruin by 40 to 45 years.

In 1909 Clark Wissler of the American Museum of Natural History organized the Archer M. One objective of this survey was to determine temporal arrangement of the American Southwest's prehistoric ruins.

Wissler, who had read about Douglass's work concerning the relationship between precipitation and tree growth, later contacted Douglass saying: Your work suggests to me a possible help in the archaeological investigation of the Southwest…We do not know how old these ruins are, but I should be glad to have an opinion from you as to whether it might be possible to connect up with your modern and dated trees specimens [with wood specimens] from these [prehistoric] ruins by correlating the curves of growth. On June 19, 1914, the curator of the American Museum of Natural History wrote a letter to Douglass expressing his desire to begin archaeological analysis as early as possible (Nash 1999: 23).

Lavinia Steward of Oracle, Arizona, a wealthy widow with an interest in astronomy and a desire to commemorate her late husband, Henry Steward.

Douglass made plans to use the Steward gift to construct a 36-inch Newtonian reflecting telescope.


  1. What is dendrochronology. Dendrochronology or tree-ring dating has been available as a recognized scientific technique since the early 1900s. Simply stated, trees in.

  2. Simply put, dendrochronology is the dating of past events climatic changes through study of tree ring growth. Botanists, foresters and archaeologists began using.

  3. Douglass used a cross-identification system to. This classic technique is called cross dating. Aitken, M. J. 1990, Science-Based Dating in Archaeology New.

  4. These pages illustrate basic methods and techniques of dendrochronology, or tree-ring dating, for use by middle and high school teachers.

  5. A. E. Douglass; Born. which is a method of dating wood by. person to formally teach classes in dendrochronology. In 1937 Douglass established the Laboratory.

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