U.S. Geological Survey: Science for a Changing World - USGS visual identifier and link to main Web site at http://www.usgs.gov/

Cooling curves for the Bear Island domain of the Mather Gorge Formation and for the Sykesville Formation. For a more detailed explanation, contact Michael Kunk at mkunk@usgs.gov.   Figure 5. Cooling curves for the Bear Island domain of the Mather Gorge Formation and for the Sykesville Formation. Filled circle represents 40Ar/39Ar amphibole cooling age; open star, Rb-Sr muscovite cooling ages; open triangle, 40Ar/39Ar muscovite cooling age; filled triangle, 40Ar/39Ar biotite cooling age; filled hexagon, U-Pb zircon growth age; ZFT, zircon fission- track cooling ages; MGF, Mather Gorge Formation. Open rectangles denote error bars. All U-Pb zircon age data are on the Sykesville Formation cooling curve. Modified from Kunk and others (in press).

U.S. Department of the Interior, U.S. Geological Survey
URL: https:// pubs.usgs.gov /circ/2004/1264/html/trip5/fig5.html
For more information, contact Michael Kunk
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