Fayetteville, Arkansas, USA DEPARTMENT OF GEOSCIENCES Division of Geography Division of Geology Departmental Organizations Gamma Theta Upsilon (GTU) Sigma Gamma Epsilon (SGE) Supporting Women in Geosciences (SWIG) AFFILIATED PROGRAMS Environmental Dynamics Program Ctr for Advanced Spatial Technologies Arkansas Water Resources Center Water Quality Laboratory USGS Water Resources Division K-12 ...

University of Arkansas Tree-Ring Laboratory The Tree-Ring Laboratory (TRL) was established in 1979 and concentrates on the development of exactly-dated annual tree-ring chronologies from ancient forests worldwide. These tree-ring chronologies are based on small non-destructive core samples taken from living trees, and cross-sections cut from dead logs. Tree-ring chronologies provide unique ...

The Ancient Cross Timbers Project Tree-Ring Laboratory University of Arkansas, Fayetteville Drawing by Richard P. Guyette of an ancient post oak forest that is typical of the Cross Timbers. The large tree at left is a classic 300-year old post oak, easily recognized by the laterally-twisted stem, old branch scars, the few heavy crooked limbs, dead limbs, hollows, and the partial exposure of the ...