Dunlap, William James2015-12-132015-12-130091-7613http://hdl.handle.net/1885/88853Correlation between the age of orogeny and the cooling rate of metamorphic rocks (through ∼ 500-180 °C), as determined through various radioisotopic dating methods, suggests that ancient orogens cooled at rates as much as two orders of magnitude slowerKeywords: cooling; exhumation; geochronology; orogeny Argon; Biotite; Cooling; Diffusion; Exhumation200010.1130/0091-7613(2000)28<139:NDETCC>2.0.CO2016-02-24