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Bryant Platt

Bryant Platt is a Geologist with the Geosciences and Environmental Change Science Center

Professional Experience

  • 2022 - Present: Geologist, USGS, Denver CO

  • 2019 - 2022: Engineering Geologist, California Department of Water Resources, Fresno CA

  • 2017 - 2019: Staff Geologist, BSK Associates, Fresno CA

  • 2016 - 2017: Natural Resource Management Trainee, Sierra National Forest, Clovis CA

  • 2015 - 2019: Teaching Assistant, California State University, Fresno, Fresno CA

  • 2014 - 2015: Geologist, USGS Albuquerque Seismological Laboratory, Albuquerque NM

  • 2014 - 2014: GIS Specialist, Malheur County, Vale OR

  • 2013 - 2013: Hydrology Technician, Malheur National Forest, John Day OR

Education and Certifications

  • 2020: M.S., Geology, California State University, Fresno, Fresno CA

  • 2013: B.S., Geology, California State University, Fresno, Fresno CA

Abstracts and Presentations

  • Johnstone, S.A., Colgan, J.P., Barrette, N.C., Hirtz, J.A.M., Platt, B.W., and Roe, W.P., 2024, A map synthesis engine for constructing geologic maps of the United States: Geological Society of America Abstracts with Programs, v. 56, Abs. 402149; presented at GSA Connects 2024, Anaheim, California, 22–25 Sept.

  • Platt, B.W., Barrette, N.C., Colgan, J.P., Hirtz, J.A.M., Johnstone, S.A., and Roe, W.P., 2024, Geologic map of the conterminous United States: Pre‑Quaternary bedrock geology: Geological Society of America Abstracts with Programs, v. 56, Abs. 402055; presented at GSA Connects 2024, Anaheim, California, 22–25 Sept.

  • Colgan, J.P., Barrette, N.C., Hirtz, J.A.M., Johnstone, S.A., Platt, B.W., and Roe, W.P., 2024, Geologic map of the conterminous United States: Earth’s surface geology: Geological Society of America Abstracts with Programs, v. 56, Abs. 402112; presented at GSA Connects 2024, Anaheim, California, 22–25 Sept.

  • Hirtz, J.A.M., Barrette, N.C., Colgan, J.P., Johnstone, S.A., Platt, B.W., Roe, W.P., Spangler, L.R., and Sweetkind, D.S., 2024, Geologic map of the conterminous United States: Precambrian geology: Geological Society of America Abstracts with Programs, v. 56, Abs. 402112; presented at GSA Connects 2024, Anaheim, California, 22–25 Sept.

  • Barrette, N.C., Campos, J.-M., Colgan, J.P., Hirtz, J.A.M., Johnstone, S.A., Platt, B.W., and Roe, W.P., 2024, Preliminary Quaternary geologic map of the United States: Geological Society of America Abstracts with Programs, v. 56, Abs. 399800; presented at GSA Connects 2024, Anaheim, California, 22–25 Sept.

  • Platt, B.W., Colgan, J.P., Johnstone, S.A., Hirtz, J.A.M., and Barrette, N.C., 2024, Preliminary bedrock geologic map of the Central and Northeastern United States: Geological Society of America Abstracts with Programs, v. 56, Abs. 397655; presented at GSA Northeastern Section Meeting 2024, Manchester, New Hampshire, 17-19 Mar.

  • Hirtz, J.A.M., Colgan, J.P., Johnstone, S.A., Platt, B.W., Barrette, N.C., Roe, W.P., and Sweetkind, D.S., 2024, Preliminary Precambrian geologic map of the Central United States: Abstract presented at Geological Society of America Southeastern Section Meeting, Asheville, North Carolina, 15–16 Apr.

  • Platt, B.W., 2023, Finding equilibrium: A multi‑phase approach for identifying potential mineral–melt equilibrium pairs from whole‑rock compositional arrays: AGU Fall Meeting 2023, Abs. V23D‑0197, San Francisco, California, 11–15 Dec.

  • Platt, B.W., Putirka, K.D., and Clynne, M.A., 2023, Does the arrival of recharge magma control the timing of volcanic eruptions? Evidence for post‑recharge cooling in eruptions from Brokeoff Volcano, Lassen Volcanic Center, California: Geological Society of America Cordilleran Section Meeting, Reno, Nevada, 17–19 May.

  • Pacheco, M., Pluhar, C., Mitchell, S., Platt, B., Shields, J., Gledhill, T., Valov, G., Ables, K., Mata, F., Teter, F., Andersen, B., Rodriguez, N., Riley, M., Wu, Q., and Byrd, J., 2019, GPR investigation of fault‑deformed historic and late Holocene paleo‑shorelines of Owens Lake, California: AGU Fall Meeting 2019, Abs. NS43D‑0869 [poster], San Francisco, California, 9–13 Dec.

  • Platt, B.W., and Putirka, K.D., 2018, Is mafic recharge necessary to trigger andesitic volcanic eruptions? New insights from feldspar and pyroxene thermometry: Geological Society of America Annual Meeting, Paper 276‑6, Indianapolis, Indiana, 4–7 Nov.

Science and Products

Non-USGS Publications**

Platt, B.W., and Putirka, K.D., 2020, [abstract] Does the Arrival of Recharge Magma Control the Timing of Volcanic Eruptions? Insights from Feldspar, Olivine, and Pyroxene Thermobarometry from Brokeoff Volcano, Lassen Volcanic Center, California.: AGU Fall Meeting 2020, V020-0024.
Platt, B.W., 2020, [thesis] Constraining Internal Eruption Trigger Mechanisms for Flows at Brokeoff Volcano, Lassen Volcanic Center, California: California State University, Fresno.
Platt, B.W., and Putirka, K.D., 2019, [abstract] Does the Arrival of Mafic Recharge Trigger Volcanic Eruptions? Evidence for Post-Recharge Cooling in Andesite Flows from Brokeoff Volcano, Lassen Volcanic Center: AGU Fall Meeting 2019, V13A-06.
De Graff, J.V., Pluhar, C.J., Gallegos, A.J., Takenaka, K., and Platt, B.W., 2018, Monitoring thermal springs to improve land management decision-making, Sierra Nevada, California: Environmental and Engineering Geoscience, 24 (2), p. 165-185.
Putirka, K.D., and Platt, B.W., 2012, Basin‑and‑Range volcanism as a passive response to extensional tectonics: Geosphere, v. 8, no. 6, p. 1274–1285, https://doi.org/10.1130/GES00803.1.
Platt, B.W., and Putirka, K.D., 2011, [abstract] A Reconstruction of Paleo-Positions of Basin and Range Volcanic Rocks, and Implications for Tectonic Controls on Volcanism: AGU Fall Meeting Abstracts 2011, V31F-2587.

**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.

View toward Blanca Peak, Colorado

National Geologic Synthesis

Surface (2D) and subsurface (3D) geologic data are critical for resource management, infrastructure design, hazards characterization, and basic earth science research. To meet these needs in a digital landscape, geologic maps must transition from static publications to machine-readable and discoverable digital databases that enable spatial analyses and queries (Shelton and others, 2022). In 2019...
By
National Cooperative Geologic Mapping Program, Geosciences and Environmental Change Science Center
National Geologic Synthesis

National Geologic Synthesis

Surface (2D) and subsurface (3D) geologic data are critical for resource management, infrastructure design, hazards characterization, and basic earth science research. To meet these needs in a digital landscape, geologic maps must transition from static publications to machine-readable and discoverable digital databases that enable spatial analyses and queries (Shelton and others, 2022). In 2019...
Learn More

Cooperative National Geologic Map: Precambrian geology Cooperative National Geologic Map: Precambrian geology

The USGS National Cooperative Geologic Mapping Program (NCGMP) was directed by Congress to create a new geologic map of the United States” by “bring[ing] together detailed national and continental-resolution 2D and 3D information produced throughout the Survey and by federal and state partners” (House Report 116-100). To fulfill this goal, the NCGMP created a map synthesis engine...
By
National Cooperative Geologic Mapping Program

Cooperative National Geologic Map: Pre-Quaternary geology Cooperative National Geologic Map: Pre-Quaternary geology

The USGS National Cooperative Geologic Mapping Program (NCGMP) was directed by Congress to create a new geologic map of the United States” by “bring[ing] together detailed national and continental-resolution 2D and 3D information produced throughout the Survey and by federal and state partners” (House Report 116-100). To fulfill this goal, the NCGMP created a map synthesis engine...
By
National Cooperative Geologic Mapping Program

Cooperative National Geologic Map: Earth’s surface geology Cooperative National Geologic Map: Earth’s surface geology

The USGS National Cooperative Geologic Mapping Program (NCGMP) was directed by Congress to create a new geologic map of the United States” by “bring[ing] together detailed national and continental-resolution 2D and 3D information produced throughout the Survey and by federal and state partners” (House Report 116-100). To fulfill this goal, the NCGMP created a map synthesis engine...
By
National Cooperative Geologic Mapping Program

Digital database of the previously published map showing geology, structure, and oil and gas fields in the Sterling 1 degree x 2 degrees quadrangle, Colorado, Nebraska, and Kansas Digital database of the previously published map showing geology, structure, and oil and gas fields in the Sterling 1 degree x 2 degrees quadrangle, Colorado, Nebraska, and Kansas

This release contains geospatial data digitized from the Map Showing Geology, Structure, and Oil and Gas Fields in the Sterling 1x2 Degree Quadrangle, Colorado, Nebraska, and Kansas (Scott, 1978) and was compiled as part of the National Geologic Synthesis project. The geospatial data depicts the geology of this quadrangle, which is dominated by Quaternary alluvial and aeolian deposits...
By
National Cooperative Geologic Mapping Program, Geosciences and Environmental Change Science Center

Science and Products

Non-USGS Publications**

Platt, B.W., and Putirka, K.D., 2020, [abstract] Does the Arrival of Recharge Magma Control the Timing of Volcanic Eruptions? Insights from Feldspar, Olivine, and Pyroxene Thermobarometry from Brokeoff Volcano, Lassen Volcanic Center, California.: AGU Fall Meeting 2020, V020-0024.
Platt, B.W., 2020, [thesis] Constraining Internal Eruption Trigger Mechanisms for Flows at Brokeoff Volcano, Lassen Volcanic Center, California: California State University, Fresno.
Platt, B.W., and Putirka, K.D., 2019, [abstract] Does the Arrival of Mafic Recharge Trigger Volcanic Eruptions? Evidence for Post-Recharge Cooling in Andesite Flows from Brokeoff Volcano, Lassen Volcanic Center: AGU Fall Meeting 2019, V13A-06.
De Graff, J.V., Pluhar, C.J., Gallegos, A.J., Takenaka, K., and Platt, B.W., 2018, Monitoring thermal springs to improve land management decision-making, Sierra Nevada, California: Environmental and Engineering Geoscience, 24 (2), p. 165-185.
Putirka, K.D., and Platt, B.W., 2012, Basin‑and‑Range volcanism as a passive response to extensional tectonics: Geosphere, v. 8, no. 6, p. 1274–1285, https://doi.org/10.1130/GES00803.1.
Platt, B.W., and Putirka, K.D., 2011, [abstract] A Reconstruction of Paleo-Positions of Basin and Range Volcanic Rocks, and Implications for Tectonic Controls on Volcanism: AGU Fall Meeting Abstracts 2011, V31F-2587.

**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.

View toward Blanca Peak, Colorado

National Geologic Synthesis

Surface (2D) and subsurface (3D) geologic data are critical for resource management, infrastructure design, hazards characterization, and basic earth science research. To meet these needs in a digital landscape, geologic maps must transition from static publications to machine-readable and discoverable digital databases that enable spatial analyses and queries (Shelton and others, 2022). In 2019...
By
National Cooperative Geologic Mapping Program, Geosciences and Environmental Change Science Center
National Geologic Synthesis

National Geologic Synthesis

Surface (2D) and subsurface (3D) geologic data are critical for resource management, infrastructure design, hazards characterization, and basic earth science research. To meet these needs in a digital landscape, geologic maps must transition from static publications to machine-readable and discoverable digital databases that enable spatial analyses and queries (Shelton and others, 2022). In 2019...
Learn More

Cooperative National Geologic Map: Precambrian geology Cooperative National Geologic Map: Precambrian geology

The USGS National Cooperative Geologic Mapping Program (NCGMP) was directed by Congress to create a new geologic map of the United States” by “bring[ing] together detailed national and continental-resolution 2D and 3D information produced throughout the Survey and by federal and state partners” (House Report 116-100). To fulfill this goal, the NCGMP created a map synthesis engine...
By
National Cooperative Geologic Mapping Program

Cooperative National Geologic Map: Pre-Quaternary geology Cooperative National Geologic Map: Pre-Quaternary geology

The USGS National Cooperative Geologic Mapping Program (NCGMP) was directed by Congress to create a new geologic map of the United States” by “bring[ing] together detailed national and continental-resolution 2D and 3D information produced throughout the Survey and by federal and state partners” (House Report 116-100). To fulfill this goal, the NCGMP created a map synthesis engine...
By
National Cooperative Geologic Mapping Program

Cooperative National Geologic Map: Earth’s surface geology Cooperative National Geologic Map: Earth’s surface geology

The USGS National Cooperative Geologic Mapping Program (NCGMP) was directed by Congress to create a new geologic map of the United States” by “bring[ing] together detailed national and continental-resolution 2D and 3D information produced throughout the Survey and by federal and state partners” (House Report 116-100). To fulfill this goal, the NCGMP created a map synthesis engine...
By
National Cooperative Geologic Mapping Program

Digital database of the previously published map showing geology, structure, and oil and gas fields in the Sterling 1 degree x 2 degrees quadrangle, Colorado, Nebraska, and Kansas Digital database of the previously published map showing geology, structure, and oil and gas fields in the Sterling 1 degree x 2 degrees quadrangle, Colorado, Nebraska, and Kansas

This release contains geospatial data digitized from the Map Showing Geology, Structure, and Oil and Gas Fields in the Sterling 1x2 Degree Quadrangle, Colorado, Nebraska, and Kansas (Scott, 1978) and was compiled as part of the National Geologic Synthesis project. The geospatial data depicts the geology of this quadrangle, which is dominated by Quaternary alluvial and aeolian deposits...
By
National Cooperative Geologic Mapping Program, Geosciences and Environmental Change Science Center
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