USGS Scientists and Staff

Warren Day

Field Geology, Regional Tectonics, Structural Geology, Petrology, Economic Geology
wday@usgs.gov
303-236-6484
(Affiliate Faculty in the Department of Geology and Geological Engineering)

Eric Anderson

Geophysics, Aeromagnetic Data, Spatial Data Analysis, Mineral Deposits, Alaska Geology
ericanderson@usgs.gov
303-236-5652
(External Joint Appointee in the Department of Geology and Geological Engineering)

Jonathan Caine

Structural Geology, Tectonics, Hydrogeology, Field Mapping
jscaine@usgs.gov
303-236-1822

Kate Campbell-Hay

Microbial and Abiotic Metal Redox Cycling, Mineralogy
kcampbell@usgs.gov
303-541-3035

LaDonna Choate

Toxicity of Mine Waste, Geochemistry
lchoate@usgs.gov
303-236-1241

Timothy S. Collett

Unconventional Natural Gas Resources, Gas Hydrates, Marine Geology, Geophysics
tcollett@usgs.gov
303-236-5731
(Affiliate Faculty in the Department of Geology and Geological Engineering)

Warren Day

Field Geology, Regional Tectonics, Structural Geology, Petrology, Economic Geology
wday@usgs.gov
303-236-6484
(Affiliate Faculty in the Department of Geology and Geological Engineering)

Matthew P. Emmons

Stable Isotope Geochemistry
memmons@usgs.gov
303-236-6259
(External Joint Appointee in the Department of Geology and Geological Engineering)

Poul Emsbo

Economic Geology, Carlin Deposits, Sedimentary Copper Deposits, Phosphorite REE Deposits, Isotope Geochemistry
pemsbo@usgs.gov
303-236-1113
(Affiliate Faculty in the Department of Geology and Geological Engineering)

Garth Graham

Hyperspectral Surveying, Alaska Geology
ggraham@usgs.gov
303-236-1558

Seth S. Haines

Geophysics, Gas Hydrates
shaines@usgs.gov
303-236-5709
(Affiliate Faculty in the Department of Geology and Geological Engineering)

Albert H. Hofstra

Economic Geology, Carlin Deposits, IOA-IOCG Deposits, Melt and Fluid Inclusions
ahofstra@usgs.gov
303-236-5530
(Affiliate Faculty in the Department of Geology and Geological Engineering)

JoAnn Holloway

Watershed Biogeochemistry, Hydrothermal Geochemistry, Hg Biogeochemistry
jholloway@usgs.gov

303-236-2449

Andy Hunt

Noble Gas Geochemistry, Gas Geochemistry, Geothermal Systems
ahunt@usgs.gov
303-236-4931

Karen Duttweiler Kelley

Economic Geology, Exploration Geochemistry, Alkalic-Related Epithermal Deposits, Sediment-Hosted Pb-Zn Deposits, Alaska Geology
kdkelley@usgs.gov
303-236-2467
(Affiliate Faculty in the Department of Geology and Geological Engineering)

Raymond Kokaly

Remote Sensing, Hyperspectral Spectroscopy
raymond@usgs.gov
720-352-7414

Erin Marsh

Fluid Inclusions, Mineral Chemistry
emarsh@usgs.gov
303-236-2473

Jeff Mauk

Epithermal Systems, Geothermal Systems, Mineralogy, Geochronology
jmauk@usgs.gov
303-236-5605
(Affiliate Faculty in the Department of Geology and Geological Engineering)

Chris Mills

Surface Geochemistry, Metal Transport in Surface Waters
cmills@usgs.gov
303-236-5529

Leah E. Morgan

Ar/Ar Geochronology
lemorgan@usgs.gov
303-236-4729
(Affiliate Faculty in the Department of Geology and Geological Engineering)

Chris Moses

Science Policy, Geomorphology of Carbonate Systems, Stable Isotope Geochemistry
cmoses@usgs.gov
303-236-1800

William I. Ridley

Igneous Petrology, Volcanology, Mineralogy
iridley@usgs.gov
303-236-5558
(Affiliate Faculty in the Department of Geology and Geological Engineering)

Cliff Taylor

REE Deposits, Banded Iron Ores, Volcanogenic Massive Sulfide Deposits, Sediment-Hosted Copper Deposits
ctaylor@usgs.gov
303-236-2499

Ryan Taylor

Economic Geology, Orogenic Gold, Porphyry Cu-Mo-Au, Mineral Chemistry
rtaylor@usgs.gov
303-236-1882

Phil Verplanck

Critical Element Resources, Carbonatite and Alkaline Intrusive-Related REE Deposits
plv@usgs.gov
303-236-1902

Douglas Yager

Volcanology, Abandoned Mine Lands, San Juan Mountain Regional Geology
dyager@usgs.gov
303-236-2487