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Gravity data along the Little Colorado River near Leupp, Arizona, 2020-2021 This dataset represents the network-adjusted results of relative- and absolute-gravity surveys. Relative-gravity surveys were carried out using a ZLS Coporation Burris relative-gravity meter. The effect of solid Earth tides and ocean loading were removed from the data. Instrument drift was removed by evaluating gravity change during repeated measurements at one or more base stations, or between absolute-gravity stations. Absolute-gravity surveys were carried out using a Micro-g LaCoste, Inc. A-10 absolute-gravity meter. The vertical gravity gradient was assumed to be -3 microGal/cm at each absolute-gravity site. Relative-gravity differences and absolute-gravity data were combined using a least-squares network adjustment,... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Arizona Water Science Center, Coconino Country, Geophysics, Leupp, Little Colorado River, All tags... Navajo Nation, Southwest Gravity Program, USGS Science Data Catalog (SDC), geophysics, gravimeter measurement, gravitational field (earth), hydrogeology, Fewer tags Grand Falls, Arizona: Dune Field Sand Transport 2013 - 2016 As part of a NASA-funded study of sediment flux rates at a Mars analog site, we installed a suite of instruments in a small dune field near Grand Falls, Arizona. Data released in this report were collected from 10/28/2013 to 11/04/2016. The Grand Falls (GF) dune field is located on the Navajo Nation. It lies ~70 km NE of Flagstaff, AZ, 2 km east of Grand Falls, and just north of the Little Colorado River (LCR). The dune field consists of barchans, smaller dunes, ripples, and bare, indurated interdune surfaces; all features commonly found on the Martian surface. We measured sediment flux using a Sensit saltation sensor and a set of three Big Spring Number Eight (BSNE) passive sediment samplers, at 20, 50, and 100... Categories: Data; Tags: Geophysics, Leupp, Navajo Reservation, Planetary Sciences, USGS Science Data Catalog (SDC), All tags... dunes, grain-size analysis, planetary sciences, sand deposits, sediment flux, sediment transport, Fewer tags Grand Falls, Arizona: Dune Field Sand Transport 2017 - 2019 As part of a NASA-funded study of sediment flux rates at a Mars analog site, we installed a suite of instruments in a small dune field near Grand Falls, Arizona. Data released in this report was collected from 02/07/2017 to 05/22/2019. The Grand Falls (GF) dune field is located on the Navajo Nation. It lies ~70 km NE of Flagstaff, AZ, 2 km east of Grand Falls, and just north of the Little Colorado River (LCR). The dune field consists of barchans, smaller dunes/ripples, and bare interdunes with indurated surfaces, all features commonly found on the Martian surface. We measured sediment flux using a Multi Layer Solid State Saltation Sensor (MLS4) and a set of three Big Spring Number Eight (BSNE) passive sediment samplers,... Categories: Data; Tags: Geophysics, Leupp, Navajo Reservation, Planetary Sciences, USGS Science Data Catalog (SDC), All tags... dunes, planetary sciences, sand deposit, sediment flux, sediment transport, Fewer tags