Harrison J. Gray
YOU?
Author Swipe
View article: Spatiotemporal Variations in Strain Release and Seismic Rupture in Multifault Systems: An Example from Panamint Valley, Southeastern California
Spatiotemporal Variations in Strain Release and Seismic Rupture in Multifault Systems: An Example from Panamint Valley, Southeastern California Open
Geometrically complex, multifault ruptures have been observed in recent, damaging earthquakes in southeastern California, sparking renewed efforts to identify physical conditions that promote or inhibit fault discontinuity-spanning coseism…
View article: Supplemental Material: Evidence for nonlocal sediment transport on hillslopes from fault scarp morphology
Supplemental Material: Evidence for nonlocal sediment transport on hillslopes from fault scarp morphology Open
Extended methods and data compilation sources.
View article: Supplemental Material: Evidence for nonlocal sediment transport on hillslopes from fault scarp morphology
Supplemental Material: Evidence for nonlocal sediment transport on hillslopes from fault scarp morphology Open
Extended methods and data compilation sources.
View article: Timing and geometry of the Chemehuevi Formation reveal a late Pleistocene sediment pulse into the Lower Colorado River
Timing and geometry of the Chemehuevi Formation reveal a late Pleistocene sediment pulse into the Lower Colorado River Open
The Chemehuevi Formation is a distinctive 50–150-m-thick wedge-shaped Pleistocene sedimentary unit deposited by the Colorado River. It lines the perimeters of the river’s floodplains and bedrock canyons for more than 600 km between the mou…
View article: Supplemental Material: Timing and geometry of the Chemehuevi Formation reveal a late Pleistocene sediment pulse into the Lower Colorado River
Supplemental Material: Timing and geometry of the Chemehuevi Formation reveal a late Pleistocene sediment pulse into the Lower Colorado River Open
U/Th cobble sample photos.
View article: Supplemental Material: Timing and geometry of the Chemehuevi Formation reveal a late Pleistocene sediment pulse into the Lower Colorado River
Supplemental Material: Timing and geometry of the Chemehuevi Formation reveal a late Pleistocene sediment pulse into the Lower Colorado River Open
U/Th cobble sample photos.
View article: Neotectonic Mapping of Puerto Rico
Neotectonic Mapping of Puerto Rico Open
Puerto Rico is part of the Puerto Rico-Virgin Islands microplate, along the Caribbean–North American plate boundary between the Puerto Rico trench subduction zone and the Muertos Trough incipient subduction zone. Despite recent seismicity …
View article: Paleoseismology of the Sawtooth Fault and Implications for Fault Behavior in the Epicentral Region of the 2020 Mw 6.5 Stanley, Idaho, Earthquake
Paleoseismology of the Sawtooth Fault and Implications for Fault Behavior in the Epicentral Region of the 2020 Mw 6.5 Stanley, Idaho, Earthquake Open
The 2020 moment magnitude (Mw) 6.5 Stanley, Idaho, earthquake raised questions about the history and extent of complex faulting in the northwestern Centennial Tectonic Belt (CTB) and its relation to the Sawtooth normal fault and Eocene Tra…
View article: High-resolution geophysical and geochronological analysis of a relict shoreface deposit offshore central California: Implications for slip rate along the Hosgri fault
High-resolution geophysical and geochronological analysis of a relict shoreface deposit offshore central California: Implications for slip rate along the Hosgri fault Open
The Cross-Hosgri slope is a bathymetric lineament that crosses the main strand of the Hosgri fault offshore Point Estero, central California. Recently collected chirp seismic reflection profiles and sediment cores provide the basis for a r…
View article: Construction and Modification of Debris-Flow Alluvial Fans as Captured in the Geomorphic and Sedimentary Record: Examples from the Western Sangre de Cristo Mountains, South-Central Colorado
Construction and Modification of Debris-Flow Alluvial Fans as Captured in the Geomorphic and Sedimentary Record: Examples from the Western Sangre de Cristo Mountains, South-Central Colorado Open
Alluvial fans offer a means to unravel the intricacies of landscape, tectonic, and climatic dynamics. This book and accompanying geologic map highlight alluvial fans and their deposits exemplified by a suite of debris-flow alluvial fans em…
View article: Comment on gchron-2023-4
Comment on gchron-2023-4 Open
Abstract. Sediment burial dating using optically stimulated luminescence (OSL) is a well-established tool in geochronology. An important but often inapplicable requirement for its successful use is that the OSL signal is sufficiently reset…
View article: Comment on egusphere-2022-934
Comment on egusphere-2022-934 Open
Abstract. Understanding long-term soil and landscape evolution can help us understand the threats to current-day soils, landscapes and their functions. The temporal evolution of soils and landscapes can be studied using geochronometers, su…
View article: Luminescence sediment tracing reveals the complex dynamics of colluvial wedge formation
Luminescence sediment tracing reveals the complex dynamics of colluvial wedge formation Open
Paleoearthquake studies that inform seismic hazard rely on assumptions of sediment transport that remain largely untested. Here, we test a widespread conceptual model and a new numerical model on the formation of colluvial wedges, a key de…
View article: A geomorphic-process-based cellular automata model of colluvial wedge morphology and stratigraphy
A geomorphic-process-based cellular automata model of colluvial wedge morphology and stratigraphy Open
The development of colluvial wedges at the base of fault scarps following normal-faulting earthquakes serves as a sedimentary record of paleoearthquakes and is thus crucial in assessing seismic hazard. Although there is a large body of obs…
View article: Portable optically stimulated luminescence age map of a paleoseismic exposure
Portable optically stimulated luminescence age map of a paleoseismic exposure Open
The quality and quantity of geochronologic data used to constrain the history of major earthquakes in a region exerts a first-order control on the accuracy of seismic hazard assessments that affect millions of people. However, evaluations …
View article: Floodplain Sediment Storage Timescales of the Laterally Confined Meandering Powder River, USA
Floodplain Sediment Storage Timescales of the Laterally Confined Meandering Powder River, USA Open
As sediment is transported through river corridors, it typically spends more time in storage than transport, and as a result, sediment delivery timescales are controlled by the duration of storage. Present understanding of storage timescal…
View article: Reply on RC1
Reply on RC1 Open
Abstract. The development of colluvial wedges at the base of fault scarps following normal-faulting earthquakes serves as a sedimentary record of paleoearthquakes and is thus crucial in assessing seismic hazard. Although there is a large b…
View article: Reply on RC2
Reply on RC2 Open
Abstract. The development of colluvial wedges at the base of fault scarps following normal-faulting earthquakes serves as a sedimentary record of paleoearthquakes and is thus crucial in assessing seismic hazard. Although there is a large b…
View article: A geomorphic-process-based cellular automata model of colluvial wedge morphology and stratigraphy
A geomorphic-process-based cellular automata model of colluvial wedge morphology and stratigraphy Open
The development of colluvial wedges at the base of fault scarps following normal-faulting earthquakes serves as a sedimentary record of paleoearthquakes and is thus crucial in assessing seismic hazard. Although there is a large body of obs…
View article: Issue Information
Issue Information Open
No abstract is available for this article.
View article: Depth-dependent soil mixing persists across climate zones
Depth-dependent soil mixing persists across climate zones Open
Significance Soil mixing occurs when sediment and organic matter are moved by biotic processes (burrowing mammals and invertebrates, root growth, and decay) and abiotic processes (movement of water and granular creep). Soil mixing plays a …
View article: Luminescence as a Sediment Tracer and Provenance Tool
Luminescence as a Sediment Tracer and Provenance Tool Open
Luminescence holds unique potential as a sediment tracer and provenance method. The tracer application of luminescence has key advantages including ease of measurement, relatively low cost, and applicability to geologically ubiquitous quar…
View article: Application of a Luminescence‐Based Sediment Transport Model
Application of a Luminescence‐Based Sediment Transport Model Open
Quantifying the transport history of sand is a challenging but important goal in geomorphology. In this paper, we take a simple idea that luminescence is bleached during transport and regenerates during storage, and use this as a basis to …
View article: On extracting sediment transport information from measurements of luminescence in river sediment
On extracting sediment transport information from measurements of luminescence in river sediment Open
Accurately quantifying sediment transport rates in rivers remains an important goal for geomorphologists, hydraulic engineers, and environmental scientists. However, current techniques for measuring long‐time scale (10 2 –10 6 years) trans…
View article: Green Falcon IV: An Unmanned Aerial System and an integrated Wireless Sensor Network for remote sensing tasks
Green Falcon IV: An Unmanned Aerial System and an integrated Wireless Sensor Network for remote sensing tasks Open
This report summarises the development of an Unmanned Aerial System and an integrated Wireless Sensor Network (WSN), suitable for the real world application in remote sensing tasks. Several aspects are discussed and analysed to provide imp…