Howard Day looking at a boulder through a hand lens.

Howard Day examines a boulder in the California Rock Garden outside the Earth and Physical Sciences building. The boulders are actively used in our lab curriculum.

Howard W. Day

Professor Emeritus; Director, Mathematics and Science Teaching Programs (MAST)
2011 Charles P. Nash Prize, UC Davis
Ph.D., Brown (1971)
Igneous and Metamorphic Petrology 

Metamorphic petrology and mineralogy; tectonic evolution of metamorphic belts; thermodynamics and phase equilibria; petrology of granites. Recent projects include: prehnite-pumpellyite and greenschist facies metamorphism in the Sierra Nevada; low blueschist facies metamorphism in the Coast Ranges; U-Pb and fission track geochronology of zircon in the Sierra Nevada; tectonic and metamorphic evolution of the Qinling and Tianshan orogenic belts, China.
(530) 752-2882

Recent Publications

Day, HW (2012) A revised diamond - graphite transition curve. AMERICAN MINERALOGIST. 97(1):52-62. DOI: 10.2138/am.2011.3763

Day, HW and SR Mulcahy (2007) Excess silica in omphacite and the formation of free silica in eclogite. JOURNAL OF METAMORPHIC GEOLOGY. 25(1):37-50. DOI: 10.1111/j.1525-1314.2006.00677.x

Schenker, MB, HW Day, LA Beckett and XL Pan (2006) Residential proximity to naturally occurring asbestos: Health risk or ecologic fallacy? AMERICAN JOURNAL OF RESPIRATORY AND CRITICAL CARE MEDICINE. 173(5):573-574.

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