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Rings as Keys to the Past

A Case of Dendroarchaeology

By Gary L. Patterson

Rings as Keys to the Past


 

Abstract

This flipped case study was written to provide foundational understanding of woody stem (tree) anatomy and to illustrate how scientific support is used to determine the age of objects made of wood, which in turn may affect an object's value. The narrative was inspired by a 2004 article by Henri Grissino-Mayer et al. that deals with questions concerning the authenticity of the so-called "Messiah" violin, a reputed Stradivarius, based on stylistic and historical grounds as well as conflicting sets of tree-ring dates. The case provides general biology, botany, and perhaps forestry instructors a chance to show relevancy for learning basic tree anatomy and the process of growth in plants that produce woody stems. Additionally, a primary focus of the case is to give students the chance to experience the preliminary steps of a process used by dendrochronologists to determine the age of wooden objects. The case was developed for general non-majors biology courses taught in high school, college/university, or for informal science education settings with adult learners.

   

Date Posted

01/05/2017

Overview

Objectives

  • Explain phenomena logically and specifically, using data or other evidence when necessary to support explanations.
  • Demonstrate a transfer of knowledge gained virtually to a "real" product.
  • Convert distinctive patterns on paper into "real" data, i.e., the age of a wood sample.
  • Understand the lateral growth process of plants that produces woody stems, i.e., trees.
  • Recognize the ability of tree ring growth patterns to "record" local, regional, and even global events.
  • Gain understanding as to the usefulness of trees' consistent growth pattern to identify when human-caused or natural events occurred, such as injury, fire, drought, insect infestations, floods, or logging.

Keywords

Crossdating; dendroarchaeology; dendrochronology; tree rings; primary growth; secondary growth; Laboratory for Tree Ring Research; luthier; skeleton plotting; tree anatomy; core; wooden musical instruments; Stradivari; Stradivarius; violin; Grissino-Mayer

  

Subject Headings

Biology (General)
Botany / Plant Science
Forestry

EDUCATIONAL LEVEL

High school, Undergraduate lower division, General public & informal education

  

FORMAT

PDF

   

TOPICAL AREAS

N/A

   

LANGUAGE

English

   

TYPE/METHODS

Flipped, Interrupted, Laboratory

 

 

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