Item talk:Q47052
From geokb
ORCID:
'@context': http://schema.org '@id': https://orcid.org/0000-0002-3945-2499 '@reverse': creator: - '@id': https://doi.org/10.1130/g46663.1 '@type': CreativeWork identifier: - '@type': PropertyValue propertyID: eid value: 2-s2.0-85084114464 - '@type': PropertyValue propertyID: doi value: 10.1130/g46663.1 name: Coexisting seismic behavior of transform faults revealed by high-resolution bathymetry - '@id': https://doi.org/10.1029/2020gl088918 '@type': CreativeWork identifier: - '@type': PropertyValue propertyID: eid value: 2-s2.0-85089363297 - '@type': PropertyValue propertyID: doi value: 10.1029/2020gl088918 name: 'The Grass Is Not Always Greener on the Other Side: Seasonal Reversal of Vegetation Greenness in Aspect-Driven Semiarid Ecosystems' - '@id': https://doi.org/10.1029/2019tc005757 '@type': CreativeWork identifier: - '@type': PropertyValue propertyID: doi value: 10.1029/2019tc005757 - '@type': PropertyValue propertyID: eid value: 2-s2.0-85082400972 name: Timing of Cenozoic Extension in the Southern Stillwater Range and Dixie Valley, Nevada - '@id': https://doi.org/10.2475/10.2019.02 '@type': CreativeWork identifier: - '@type': PropertyValue propertyID: doi value: 10.2475/10.2019.02 - '@type': PropertyValue propertyID: eid value: 2-s2.0-85079522853 name: 'Dilution and propagation of provenance trends in sand and mud: Geochemistry and detrital zircon geochronology of modern sediment from central California (U.S.A.)' - '@id': https://doi.org/10.1038/s41561-019-0442-3 '@type': CreativeWork identifier: - '@type': PropertyValue propertyID: eid value: 2-s2.0-85074203122 - '@type': PropertyValue propertyID: doi value: 10.1038/s41561-019-0442-3 name: "Earth\u2019s topographic relief potentially limited by an upper bound\ \ on channel steepness" - '@id': https://doi.org/10.1130/g45898.1 '@type': CreativeWork identifier: - '@type': PropertyValue propertyID: doi value: 10.1130/g45898.1 - '@type': PropertyValue propertyID: eid value: 2-s2.0-85065537519 name: 'A supervolcano and its sidekicks: A 100 ka eruptive chronology of the Fish Canyon Tuff and associated units of the La Garita magmatic system, Colorado, USA' - '@id': https://doi.org/10.3389/feart.2019.00057 '@type': CreativeWork identifier: - '@type': PropertyValue propertyID: eid value: 2-s2.0-85064228907 - '@type': PropertyValue propertyID: doi value: 10.3389/feart.2019.00057 name: A Stratigraphic Approach to Inferring Depositional Ages From Detrital Geochronology Data - '@id': https://doi.org/10.3389/feart.2019.00161 '@type': CreativeWork identifier: - '@type': PropertyValue propertyID: doi value: 10.3389/feart.2019.00161 - '@type': PropertyValue propertyID: eid value: 2-s2.0-85068449766 name: 'Erratum to: A stratigraphic approach to inferring depositional ages from detrital geochronology data (frontiers in earth science, (2019), 7, 10.3389/feart.2019.00057)' - '@id': https://doi.org/10.1130/ges01680.1 '@type': CreativeWork identifier: - '@type': PropertyValue propertyID: doi value: 10.1130/ges01680.1 - '@type': PropertyValue propertyID: eid value: 2-s2.0-85057377796 name: 'Establishing chronologies for alluvial-fan sequences with analysis of high-resolution topographic data: San Luis Valley, Colorado, USA' - '@id': https://doi.org/10.1029/2018tc005207 '@type': CreativeWork identifier: - '@type': PropertyValue propertyID: eid value: 2-s2.0-85055029064 - '@type': PropertyValue propertyID: doi value: 10.1029/2018tc005207 name: Interpretation of Low-Temperature Thermochronometer Ages From Tilted Normal Fault Blocks - '@id': https://doi.org/10.1016/j.gr.2018.02.014 '@type': CreativeWork identifier: - '@type': PropertyValue propertyID: doi value: 10.1016/j.gr.2018.02.014 - '@type': PropertyValue propertyID: eid value: 2-s2.0-85044474483 name: Understanding the geologic evolution of Northern Tibetan Plateau with multiple thermochronometers - '@id': https://doi.org/10.1130/ges01674.1 '@type': CreativeWork identifier: - '@type': PropertyValue propertyID: eid value: 2-s2.0-85054564085 - '@type': PropertyValue propertyID: doi value: 10.1130/ges01674.1 name: Controls on submarine channel-modifying processes identified through morphometric scaling relationships - '@id': https://doi.org/10.1016/j.epsl.2017.07.044 '@type': CreativeWork identifier: - '@type': PropertyValue propertyID: doi value: 10.1016/j.epsl.2017.07.044 - '@type': PropertyValue propertyID: eid value: 2-s2.0-85031093323 name: Sediment unmixing using detrital geochronology - '@id': https://doi.org/10.1016/j.epsl.2017.08.037 '@type': CreativeWork identifier: - '@type': PropertyValue propertyID: doi value: 10.1016/j.epsl.2017.08.037 - '@type': PropertyValue propertyID: eid value: 2-s2.0-85032841597 name: Weak bedrock allows north-south elongation of channels in semi-arid landscapes - '@id': https://doi.org/10.1130/b31546.1 '@type': CreativeWork identifier: - '@type': PropertyValue propertyID: doi value: 10.1130/b31546.1 - '@type': PropertyValue propertyID: eid value: 2-s2.0-85028812618 name: Soil development over mud-rich rocks produces landscape-scale erosional instabilities in the northern Gabilan Mesa, California - '@id': https://doi.org/10.1130/g36052.1 '@type': CreativeWork identifier: - '@type': PropertyValue propertyID: doi value: 10.1130/g36052.1 - '@type': PropertyValue propertyID: eid value: 2-s2.0-84920432959 name: Lithologic control on the form of soil-mantled hillslopes - '@id': https://doi.org/10.1016/j.gca.2013.01.004 '@type': CreativeWork identifier: - '@type': PropertyValue propertyID: doi value: 10.1016/j.gca.2013.01.004 - '@type': PropertyValue propertyID: eid value: 2-s2.0-84874971743 name: "LA-ICP-MS depth profile analysis of apatite: Protocol and implications\ \ for (U\u2013Th)/He thermochronometry" - '@id': https://doi.org/10.1002/esp.4187 '@type': CreativeWork identifier: - '@type': PropertyValue propertyID: eid value: 2-s2.0-85026480139 - '@type': PropertyValue propertyID: doi value: 10.1002/esp.4187 name: Field evidence for the control of grain size and sediment supply on steady-state bedrock river channel slopes in a tectonically active setting '@type': Person affiliation: '@type': Organization alternateName: Central Minerals and Environmental Resources Science Center identifier: '@type': PropertyValue propertyID: RINGGOLD value: '93526' name: US Geological Survey Central Region alumniOf: - '@type': Organization alternateName: Earth and Planetary Sciences identifier: '@type': PropertyValue propertyID: RINGGOLD value: '8787' name: University of California Santa Cruz - '@type': Organization alternateName: Geological Sciences identifier: '@type': PropertyValue propertyID: RINGGOLD value: '6429' name: Stanford University familyName: Johnstone givenName: Samuel identifier: '@type': PropertyValue propertyID: Scopus Author ID value: '56469035300' mainEntityOfPage: https://orcid.org/0000-0002-3945-2499
OpenAlex:
created_date: '2023-07-21' display_name: Samuel A. Johnstone display_name_alternatives: - Samuel Johnstone - Samuel A. Johnstone - S. Johnstone - S. A. Johnstone - Sam Johnstone ids: openalex: https://openalex.org/A5069121734 orcid: https://orcid.org/0000-0002-3945-2499 scopus: http://www.scopus.com/inward/authorDetails.url?authorID=56469035300&partnerID=MN8TOARS last_known_institutions: - country_code: US display_name: United States Geological Survey id: https://openalex.org/I1286329397 lineage: - https://openalex.org/I1286329397 - https://openalex.org/I1335927249 ror: https://ror.org/035a68863 type: government orcid: https://orcid.org/0000-0002-3945-2499 topics: - count: 28 display_name: Climate Change and Paleoclimatology domain: display_name: Physical Sciences id: https://openalex.org/domains/3 field: display_name: Earth and Planetary Sciences id: https://openalex.org/fields/19 id: https://openalex.org/T10017 subfield: display_name: Atmospheric Science id: https://openalex.org/subfields/1902 - count: 20 display_name: Machine Learning for Mineral Prospectivity Mapping domain: display_name: Physical Sciences id: https://openalex.org/domains/3 field: display_name: Computer Science id: https://openalex.org/fields/17 id: https://openalex.org/T12157 subfield: display_name: Artificial Intelligence id: https://openalex.org/subfields/1702 - count: 17 display_name: Tectonic and Geochronological Evolution of Orogens domain: display_name: Physical Sciences id: https://openalex.org/domains/3 field: display_name: Earth and Planetary Sciences id: https://openalex.org/fields/19 id: https://openalex.org/T10001 subfield: display_name: Geophysics id: https://openalex.org/subfields/1908 - count: 17 display_name: Sedimentary Processes in Earth's Geology domain: display_name: Physical Sciences id: https://openalex.org/domains/3 field: display_name: Earth and Planetary Sciences id: https://openalex.org/fields/19 id: https://openalex.org/T10965 subfield: display_name: Earth-Surface Processes id: https://openalex.org/subfields/1904 - count: 10 display_name: Landslide Hazards and Risk Assessment domain: display_name: Physical Sciences id: https://openalex.org/domains/3 field: display_name: Environmental Science id: https://openalex.org/fields/23 id: https://openalex.org/T10535 subfield: display_name: Management, Monitoring, Policy and Law id: https://openalex.org/subfields/2308 - count: 9 display_name: Geological Evolution of the Arctic Region domain: display_name: Physical Sciences id: https://openalex.org/domains/3 field: display_name: Earth and Planetary Sciences id: https://openalex.org/fields/19 id: https://openalex.org/T13193 subfield: display_name: Geology id: https://openalex.org/subfields/1907 - count: 9 display_name: Seismicity and Tectonic Plate Interactions domain: display_name: Physical Sciences id: https://openalex.org/domains/3 field: display_name: Earth and Planetary Sciences id: https://openalex.org/fields/19 id: https://openalex.org/T10110 subfield: display_name: Geophysics id: https://openalex.org/subfields/1908 - count: 7 display_name: Characterization of Shale Gas Pore Structure domain: display_name: Physical Sciences id: https://openalex.org/domains/3 field: display_name: Engineering id: https://openalex.org/fields/22 id: https://openalex.org/T10399 subfield: display_name: Mechanics of Materials id: https://openalex.org/subfields/2211 - count: 5 display_name: Geological Modeling and Uncertainty Analysis domain: display_name: Physical Sciences id: https://openalex.org/domains/3 field: display_name: Earth and Planetary Sciences id: https://openalex.org/fields/19 id: https://openalex.org/T13067 subfield: display_name: Geochemistry and Petrology id: https://openalex.org/subfields/1906 - count: 5 display_name: Soil Erosion and Agricultural Sustainability domain: display_name: Life Sciences id: https://openalex.org/domains/1 field: display_name: Agricultural and Biological Sciences id: https://openalex.org/fields/11 id: https://openalex.org/T10889 subfield: display_name: Soil Science id: https://openalex.org/subfields/1111 - count: 5 display_name: Ecological Dynamics of Riverine Landscapes domain: display_name: Physical Sciences id: https://openalex.org/domains/3 field: display_name: Environmental Science id: https://openalex.org/fields/23 id: https://openalex.org/T10577 subfield: display_name: Ecology id: https://openalex.org/subfields/2303 - count: 5 display_name: Geological Evolution of South China Sea domain: display_name: Physical Sciences id: https://openalex.org/domains/3 field: display_name: Earth and Planetary Sciences id: https://openalex.org/fields/19 id: https://openalex.org/T13177 subfield: display_name: Geology id: https://openalex.org/subfields/1907 - count: 3 display_name: Anaerobic Methane Oxidation and Gas Hydrates domain: display_name: Physical Sciences id: https://openalex.org/domains/3 field: display_name: Environmental Science id: https://openalex.org/fields/23 id: https://openalex.org/T10995 subfield: display_name: Environmental Chemistry id: https://openalex.org/subfields/2304 - count: 3 display_name: Aeolian Geomorphology and Wind Erosion Dynamics domain: display_name: Physical Sciences id: https://openalex.org/domains/3 field: display_name: Earth and Planetary Sciences id: https://openalex.org/fields/19 id: https://openalex.org/T12383 subfield: display_name: Earth-Surface Processes id: https://openalex.org/subfields/1904 - count: 2 display_name: Causes and Impacts of Climate Change Over Millennia domain: display_name: Physical Sciences id: https://openalex.org/domains/3 field: display_name: Earth and Planetary Sciences id: https://openalex.org/fields/19 id: https://openalex.org/T11594 subfield: display_name: Atmospheric Science id: https://openalex.org/subfields/1902 - count: 2 display_name: Management and Reproducibility of Scientific Workflows domain: display_name: Social Sciences id: https://openalex.org/domains/2 field: display_name: Decision Sciences id: https://openalex.org/fields/18 id: https://openalex.org/T11986 subfield: display_name: Information Systems and Management id: https://openalex.org/subfields/1802 - count: 2 display_name: Coastal Dynamics and Climate Change Impacts domain: display_name: Physical Sciences id: https://openalex.org/domains/3 field: display_name: Earth and Planetary Sciences id: https://openalex.org/fields/19 id: https://openalex.org/T10647 subfield: display_name: Earth-Surface Processes id: https://openalex.org/subfields/1904 - count: 2 display_name: Mantle Dynamics and Earth's Structure domain: display_name: Physical Sciences id: https://openalex.org/domains/3 field: display_name: Earth and Planetary Sciences id: https://openalex.org/fields/19 id: https://openalex.org/T10413 subfield: display_name: Geophysics id: https://openalex.org/subfields/1908 - count: 2 display_name: Machine Learning for Earthquake Early Warning Systems domain: display_name: Physical Sciences id: https://openalex.org/domains/3 field: display_name: Computer Science id: https://openalex.org/fields/17 id: https://openalex.org/T13018 subfield: display_name: Artificial Intelligence id: https://openalex.org/subfields/1702 - count: 1 display_name: Nazi Germany and Postwar Europe domain: display_name: Social Sciences id: https://openalex.org/domains/2 field: display_name: Social Sciences id: https://openalex.org/fields/33 id: https://openalex.org/T12645 subfield: display_name: Political Science and International Relations id: https://openalex.org/subfields/3320 - count: 1 display_name: Geochemistry and Petrology of Gemstones domain: display_name: Physical Sciences id: https://openalex.org/domains/3 field: display_name: Earth and Planetary Sciences id: https://openalex.org/fields/19 id: https://openalex.org/T13443 subfield: display_name: Geochemistry and Petrology id: https://openalex.org/subfields/1906 - count: 1 display_name: Mechanical Effects of Plant Roots on Slope Stability domain: display_name: Physical Sciences id: https://openalex.org/domains/3 field: display_name: Engineering id: https://openalex.org/fields/22 id: https://openalex.org/T12729 subfield: display_name: Mechanical Engineering id: https://openalex.org/subfields/2210 - count: 1 display_name: Diversity and Conservation of Vascular Plants in Central Europe domain: display_name: Life Sciences id: https://openalex.org/domains/1 field: display_name: Agricultural and Biological Sciences id: https://openalex.org/fields/11 id: https://openalex.org/T12618 subfield: display_name: Plant Science id: https://openalex.org/subfields/1110 - count: 1 display_name: Data Sharing and Stewardship in Science domain: display_name: Physical Sciences id: https://openalex.org/domains/3 field: display_name: Computer Science id: https://openalex.org/fields/17 id: https://openalex.org/T11937 subfield: display_name: Information Systems id: https://openalex.org/subfields/1710 - count: 1 display_name: Cultural Policy and Innovation in Education domain: display_name: Social Sciences id: https://openalex.org/domains/2 field: display_name: Social Sciences id: https://openalex.org/fields/33 id: https://openalex.org/T13327 subfield: display_name: Cultural Studies id: https://openalex.org/subfields/3316 updated_date: '2024-05-23T14:30:38.018229'
USGS Staff Profile:
'@context': https://schema.org '@type': Person affiliation: [] description: - '@type': TextObject abstract: Research Geologist with the Geosciences and Environmental Change Science Center additionalType: short description - '@type': TextObject abstract: "I am a Research Geologist interesested in understanding how processes\ \ of erosion and faulting interact to shape Earth\u2019s surface. I study these\ \ phenomena through geologic maps, laboratory techniques that measure the history\ \ of rocks being exhumed toward the surface, and with measurements and models\ \ of Earth's surface topography." additionalType: staff profile page introductory statement - '@type': TextObject abstract: I came to the USGS as a Mendenhall Postdoctoral Fellow in 2016 to study landscape evolution in the Southern Rocky Mountains and to help complete a facility for measuring the cooling histories of minerals as part of the Mineral Resources Program. In 2018 I transitioned to a job as a Research Geologist funded by the National Cooperative Geologic Mapping program, where I work now. In this capacity I conduct regional-scale geologic mapping and synthesis of Quaternary sedimentary deposits with the goal of ultimately establishing a seamlesss national-scale geologic map database that can aid in the characterization of geologic hazards and natural resources. This work is currently focused in two regions, in Arkansas and in a large transect spanning the Intermountain West, for which I also serve as the lead of the surficial geologic working group.In addition to these roles I conduct research into the mechanisms of landscape evolution in an effort to better interpret the geologic record of natural hazards and past environmental change, focusing on two broad classifications of problems. First, I seek to develop numerical and statistical models to refine geologic inferences made from geochronologic data and to quantify uncertainty in those interpretations. Second, I try to understand the connection between earth surface processes, landscape form, and recent geologic deposits by developing numerical models that enable simulation of these phenomena. In these efforts I am interested in developing approaches for characterizing landscape evolution through paired analysis of topographic and geologic map data.Prior to starting at the USGS I obtained my PhD from Stanford University in 2016, where I studied how sediment transport and erosion processes shaped hillslopes and river networks, and how some micro-climatic gradients enduced by aspect differences influenced these processes. In 2011 I obtained my MSc from UC Santa Cruz, where I had also obtained my BS a few years earlier. It was at UC Santa Cruz that I first got excited about geologic mapping and where I developed an interest in using low-temperature thermochronology to study histories of faulting. additionalType: personal statement email: sjohnstone@usgs.gov hasCredential: - '@type': EducationalOccupationalCredential name: Stanford University, PhD in Geology - '@type': EducationalOccupationalCredential name: UC Santa Cruz, MS in Geology - '@type': EducationalOccupationalCredential name: UC Santa Cruz, BS Earth Science hasOccupation: - '@type': OrganizationalRole affiliatedOrganization: '@type': Organization name: Geosciences and Environmental Change Science Center url: https://www.usgs.gov/centers/geosciences-and-environmental-change-science-center roleName: Research Geologist startDate: '2024-05-10T21:03:26.485619' identifier: - '@type': PropertyValue propertyID: ORCID value: 0000-0002-3945-2499 - '@type': PropertyValue propertyID: GeoKB value: https://geokb.wikibase.cloud/entity/Q47052 jobTitle: Research Geologist knowsAbout: - '@type': Thing additionalType: self-claimed expertise name: Geomorphology - '@type': Thing additionalType: self-claimed expertise name: Thermochronology - '@type': Thing additionalType: self-claimed expertise name: Topographic analysis - '@type': Thing additionalType: self-claimed expertise name: Numerical modelling memberOf: '@type': OrganizationalRole member: '@type': Organization name: U.S. Geological Survey name: staff member startDate: '2024-05-10T21:03:26.481938' name: Sam A Johnstone url: https://www.usgs.gov/staff-profiles/sam-johnstone
