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North-Central Section - 57th Annual Meeting - 2023

Paper No. 31-6
Presentation Time: 3:25 PM

THE METAMORPHIC ROCK RECORD THROUGH EARTH'S HISTORY


HOLDER, Robert, Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI 48109 and VIETE, Daniel, Department of Earth & Planetary Sciences, Johns Hopkins University, 3400 N Charles Street, Baltimore, MD 21218

Regionally metamorphosed rocks provide a direct record of past tectonic activity. Pressures, temperatures, and timescales of metamorphism in the rock record vary as functions of age. With the caveat of imperfection in the rock record, these differences challenge the assumption that Earth’s tectonic processes have always operated as they do today. In this presentation, I summarize the changes in the metamorphic rock record and some of the secular changes in tectonics (or lack thereof) that they might record.

Session No. 31

T29. Reading the Record of Tectonic Processes through Diverse Investigations of Igneous and Metamorphic Rocks
Friday, 5 May 2023: 1:30 PM-5:30 PM
EC 410 (L.V. Eberhard Center)
Geological Society of America Abstracts with Programs. Vol. 55, No. 3
doi: 10.1130/abs/2023NC-386434
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