Sam Johnstone
U.S. Geological SurveyGECSC, Denver, CO
Activity
2025
-
A MAP SYNTHESIS ENGINE FOR COMPILING MULTIPLE GEOLOGIC MAPS IN THE USGS GEOLOGIC MAP SCHEMA (GEMS): AN EXAMPLE USING CALIFORNIA'S STATEWIDE 1:250,000-SCALE GEOLOGIC ATLAS MAP SERIES
33 Cordilleran and Other Orogenic Belt Evolution from Components to Whole (Posters)Friday, 4 April 20258:00 AM - 4:00 PMSierra Ballroom
-
A SYN- TO POST-TECTONIC RECORD OF COOLING FROM THERMOCHRONOLOGY OF THE LATE PALEOZOIC OUACHITA OROGEN IN WESTERN ARKANSAS
7 Late Paleozoic Orogenesis from the Southern and Eastern Convergent Margins of Laurentia to the Mid-Continent: Records of Appalachian, Ouachita-Marathon, and Contemporaneous Intraplate DeformationMonday, 10 March 20258:00 AM - 12:00 PM101
2024
-
CONTROLS ON LANDSLIDE SIZE AND DEFORMATION HISTORY ALONG THE SOUTHERN BIG SUR COAST, CA
T177 Current Trends in Landslide Inventories and Assessments: Innovative Techniques, Collection Methods, Modeling, and Risk (Posters)Tuesday, 24 September 20248:00 AM - 5:30 PMHall D
-
A MAP SYNTHESIS ENGINE FOR CONSTRUCTING GEOLOGIC MAPS OF THE UNITED STATES
T105 Geologic Maps and Their Derivatives (Posters)Monday, 23 September 20248:00 AM - 5:30 PMHall D
-
GEOLOGIC MAP OF THE CONTERMINOUS UNITED STATES: PRECAMBRIAN GEOLOGY
T105 Geologic Maps and Their Derivatives (Posters)Monday, 23 September 20248:00 AM - 5:30 PMHall D
-
GEOLOGIC MAP OF THE CONTERMINOUS UNITED STATES: EARTH’S SURFACE GEOLOGY
T105 Geologic Maps and Their Derivatives (Posters)Monday, 23 September 20248:00 AM - 5:30 PMHall D
-
GEOLOGIC MAP OF THE CONTERMINOUS UNITED STATES: QUATERNARY GEOLOGY
T105 Geologic Maps and Their Derivatives (Posters)Monday, 23 September 20248:00 AM - 5:30 PMHall D
-
GEOLOGIC MAP OF THE CONTERMINOUS UNITED STATES: PRE-QUATERNARY BEDROCK GEOLOGY
T105 Geologic Maps and Their Derivatives (Posters)Monday, 23 September 20248:00 AM - 5:30 PMHall D
-
THERMOCHRONOLOGY RECORD OF THE LATE PALEOZOIC OUACHITA OROGEN, WESTERN ARKANSAS
T35 Advances and Applications of Thermochronology to Tectonic, Magmatic, Basin, and Geomorphic Problems (Posters)Sunday, 22 September 20248:00 AM - 5:30 PMHall D
-
FINDING MIMA: A DEEP LEARNING BASED INVENTORY MAP OF MIMA MOUND PRESENCE IN THE PACIFIC NORTHWEST
T46 Critical Zone Science: Intersection of Processes Linked to Geomorphology, Ecology and Climate (Posters)Sunday, 22 September 20248:00 AM - 5:30 PMHall D
-
DEEP LEARNING-BASED CLASSIFICATION OF MIMA MOUND PRESENCE IN PACIFIC NORTHWEST LANDSCAPES USING DIGITAL ELEVATION MODELS
37 D1. Recent Advances in Geoscience and Geoscience Education (Posters)Friday, 17 May 20249:00 AM - 1:30 PMGrand Ballroom
-
PRELIMINARY QUATERNARY GEOLOGIC MAP OF THE UNITED STATES
39 Mapping the West (Posters)Friday, 17 May 20249:00 AM - 1:30 PMGrand Ballroom
-
PRELIMINARY PRECAMBRIAN GEOLOGIC MAP OF THE CENTRAL UNITED STATES
14 Geologic Maps, Geophysical Maps, 3-D Geological Models, Digital Mapping Techniques, Map Derivatives, and Digital Map Preparation (Posters)Monday, 15 April 20248:00 AM - 12:00 PMGrand Ballroom
-
PRELIMINARY BEDROCK GEOLOGIC MAP OF THE CENTRAL AND NORTHEASTERN UNITED STATES
24 Mapping in the Geosciences: Processes and Products (Posters)Monday, 18 March 20249:00 AM - 1:00 PMArmory Ballroom
2023
-
A NATIONAL-RESOLUTION COMPILATION OF QUATERNARY GEOLOGY FOR THE CONTERMINOUS UNITED STATES
7 Geologic Mapping in the Rocky Mountains: Evolving Techniques and Challenges (Posters)Tuesday, 23 May 20238:00 AM - 6:00 PMC/D Ballroom
-
ASSESSING THE EFFICACY OF CLUSTERING TECHNIQUES FOR AIDING REGIONAL SYNTHESIS OF QUATERNARY GEOLOGY
7 Geologic Mapping in the Rocky Mountains: Evolving Techniques and Challenges (Posters)Tuesday, 23 May 20238:00 AM - 6:00 PMC/D Ballroom
2022
-
ASPECT, HILLSLOPE PEDOGENESIS, AND THE EMERGENCE OF TOPOGRAPHIC ASYMMETRY
T202 Soils and Geomorphology (Posters): In Memory of Pete BirkelandTuesday, 11 October 20222:00 PM - 6:00 PMExhibit Hall F
-
CONTINENTAL-SCALE INVESTIGATIONS USING A NATIONAL GEOLOGIC MAP DATABASE: FIRST STEPS TOWARDS A NATIONAL SYNTHESIS OF QUATERNARY GEOLOGIC MAPS
T30 Geology across Geographic Boundaries: Identifying Challenges and Opportunities Related to the Creation of a Digital Geologic Map of the United States by the End of This Decade (Posters)Sunday, 9 October 20229:00 AM - 1:00 PMExhibit Hall F
-
EFFORTS TOWARDS CONSISTENT AND COMPLETE BEDROCK AND SURFICIAL MAPS OF THE UNITED STATES
T30 Geology across Geographic Boundaries: Identifying Challenges and Opportunities Related to the Creation of a Digital Geologic Map of the United States by the End of This Decade (Posters)Sunday, 9 October 20229:00 AM - 1:00 PMExhibit Hall F
-
ODDLY ORGANIZED NETWORKS OF THE SOUTHERN OZARK DOME: IDENTIFYING AND UNDERSTANDING STRUCTURALLY CONTROLLED ANOMALIES IN DRAINAGE NETWORKS
2 Posters up all day Tuesday, Thursday, and 8 a.m. to noon Friday - Authors available Monday & Tuesday following the PM Oral SessionsMonday, 20 June 20228:00 AM - 5:15 PMGrand 'Ole Hall
-
TEMPORAL AND SPATIAL PATTERNS OF DEGLACIATION AND ALLUVIAL FAN DEPOSITION IN THE SOUTHERN ROCKY MOUNTAINS, COLORADO, USA
7 Quaternary Paleoclimate Records of the Rocky Mountain Region (Posters)Tuesday, 15 March 20228:30 AM - 6:00 PMStudent Union Ballroom A/B
2021
-
DETRITAL ZIRCONS AND SEDIMENT ROUTING IN THE YOUNGEST ROCKS OF THE ARKOMA BASIN FILL IN ARKANSAS, USA
4 A Matter of Time I: Using High-Resolution Stratigraphic and Sedimentologic Techniques to Investigate the Mid-Continent Geologic RecordSunday, 18 April 20211:00 PM - 5:00 PMUALR Earth Science Room
2020
-
MODIFIED GEOLOGIC MAPPING SCHEMA (GEMS) FOR REGIONAL GEOLOGIC MAP COMPILATION: AN EXAMPLE FROM THE USGS GEOLOGIC FRAMEWORK OF THE INTERMOUNTAIN WEST PROJECT
13 Geologic Maps and GIS—The Foundation of Research and Exploration (Posters)Tuesday, 5 May 20208:30 AM - 4:30 PMBallroom A
2019
-
A POTENTIAL SEISMIC ORIGIN FOR LATE HOLOCENE FLUVIAL AGGRADATION AND INCISION, EASTGATE, CHURCHILL COUNTY, WEST-CENTRAL NEVADA
105 D9. Recent Advances in Geomorphology (Posters)Monday, 23 September 20199:00 AM - 6:30 PMHall AB, North Building
-
EXPLORING THE SPATIAL AND TEMPORAL VARIABILITY OF FAULT ACTIVITY ALONG THE SANGRE DE CRISTO RANGE WITH LOW-TEMPERATURE THERMOCHRONOLOGY, RIVER PROFILE INVERSIONS, AND ANALYSIS OF FAULT SCARP MORPHOLOGY
T51 Exploring Connections between Extension, Sedimentation, and Volcanism in the Rio Grande Rift (Posters)Sunday, 22 September 20199:00 AM - 5:30 PMHall AB, North Building
-
TWO-PHASE CENOZOIC EXTENSION IN THE STILLWATER RANGE AND DIXIE VALLEY, NEVADA
2 Cordilleran Tectonics from the Basin and Range to Alaska and the Arctic I: A Celebration of Elizabeth Miller’s Career (2018 GSA Structure and Tectonics Division Career Contribution Award)Wednesday, 15 May 20198:00 AM - 12:00 PMRoom B117-119
2018
-
INTERPRETATION OF LOW-TEMPERATURE THERMOCHRONOMETER AGES FROM TILTED NORMAL FAULT BLOCKS
T113 EARTHTIMEs and EarthRates: Exploring the Tempo and Mode of Earth-System Processes and Evolution (Posters)Monday, 5 November 20189:00 AM - 6:30 PMHalls J-K
-
A SUPERVOLCANO AND ITS SIDEKICKS: A 100 KA ERUPTIVE CHRONOLOGY OF THE FISH CANYON TUFF AND ASSOCIATED UNITS OF THE LA GARITA MAGMATIC SYSTEM
T113 EARTHTIMEs and EarthRates: Exploring the Tempo and Mode of Earth-System Processes and Evolution (Posters)Monday, 5 November 20189:00 AM - 6:30 PMHalls J-K
-
A STRATIGRAPHIC APPROACH TO INFERRING DEPOSITIONAL AGES FROM DETRITAL GEOCHRONOLOGY
T42 Frontiers in Mineralogy, Petrology, and Geochronology (Posters): A Session in Honor of Dana Medalist Jörg HermannSunday, 4 November 20189:00 AM - 5:30 PMHalls J-K
2017
-
MAPPING THE HISTORY OF ALLUVIAL FAN DEPOSITION WITH ANALYSIS OF HIGH-RESOLUTION TOPOGRAPHIC DATA
T391 Tectonics, Geohazards, and Morphodynamics from High-Resolution Topography and Imagery (Posters)Wednesday, 25 October 20179:00 AM - 6:30 PMHalls 4EF
-
WHEN WATER IS SCARCE AND ROCKS ARE FRAGILE, EQUATOR-FACING VALLEY NETWORKS OUT-STRETCH THEIR POLE-FACING COUNTERPARTS
T212 How, and Under What Conditions, Does Weathering Influence Surface Processes?Tuesday, 24 October 20178:00 AM - 12:00 PMChelan 2
-
UNMIXING EUSTATIC AND TECTONIC SIGNALS IN SEDIMENTARY SYSTEMS FROM DETRITAL GEOCHRONOLOGY
T43 The Dynamics of Tectono-Sedimentary Systems During Basin Formation and Fill IISunday, 22 October 20171:30 PM - 5:30 PMBallroom 6C