Person

Samuel A Johnstone

Research Geologist

Geosciences and Environmental Change Science Center

Email: sjohnstone@usgs.gov
Office Phone: 303-236-5705
ORCID: 0000-0002-3945-2499

Supervisor: Margaret E Berry

21 items:

Structure-from-Motion model for the Curtis Lake North area, Mushroom Rock region, northeastern California This dataset contains a point cloud and orthophoto of the Curtis Lake North area, Mushroom Rock region, northeastern California created using structure-from-motion. It is Dataset S1 in the related manuscript. Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: Northeastern California, fault, structure from motion, volcanic rocks
Structure-from-Motion model for the Nelson Slides area, Mushroom Rock region, northeastern California This dataset contains a point cloud and orthophoto of the Nelson Slides area, Mushroom Rock region, northeastern California created using structure-from-motion. It is Dataset S3 in the related manuscript. Categories: Data; Types: Downloadable, GeoTIFF, Map Service, Raster; Tags: Northeastern California, fault, structure from motion, volcanic rocks
Detrital zircon geochronology and geochemistry data from the seafloor of the Bering Sea and adjacent river systems This dataset archives geochronology and geochemistry measurements from detrital zircons collected from samples taken from the Bering Sea and its major feeder rivers. Categories: Data; Tags: Bering Sea, Geochemistry, Marine Geology, Sedimentology, USGS Science Data Catalog (SDC), All tags...
Simplified fault traces in the Pit River region, northeastern California This dataset contains simplified fault traces, derived from the lineament mapping, for the Pit River region, northeastern California. Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Northeastern California, fault
Quaternary fault mapping of the Zapata and Blanca sections of the Sangre de Cristo fault zone from high-resolution 3DEP topography This data release contains a dataset that depicts fault scarps along the Zapata and Blanca sections of the Sangre de Cristo fault zone located in the San Luis basin of southern Colorado. The Zapata and Blanca sections extend from the Great Sand Dunes National Park and Preserve to the Blanca Peak massif and are differentiated by a sharp change in fault zone orientation from north-south to east-west. The fault scarps are the result of Quaternary tectonic extension causing surface rupturing earthquakes estimated to have occurred most recently 8-12 ka with probable Mw 6-7 (Ruleman & Machette, 2007). The dataset represents detailed mapping of probable fault surface rupture on high-resolution (1m/pix) topographic data... Tags: Blanca section, Colorado, Geomorphology, Rio Grande Rift, Sangre de Cristo, All tags...

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