Data

Grand Falls dune field (GFDF) is located on the Navajo Nation, ~70 km NE of Flagstaff, AZ. This active dune field displays a range of morphologies, including barchans, dome dunes, smaller dunes, and ripples, and is bimodal both in mineralogical composition and grain size distribution. The felsic component is likely derived from the Little Colorado River, and the mafic component (basaltic...

This dataset contains shapefiles that describe topographic long profiles of recent Martian gully flows recording various information about the flow and host gully. Each profile has some or all of the following: a profile of the active flow, a profile of the full gully, the location of the channel mouth, a profile recording different types of activity, a shapefile with locations of...

In order to support the landing and operations of NASA Mars 2020 Perseverance rover, the U.S. Geological Survey (USGS) previously generated Digital Elevation Model (DEM) and orthoimage mosaics of the floor of Jezero crater. Over four years of operations, Perseverance has collected numerous samples while climbing the western rim of Jezero and has travelled beyond the extent of the...

Metadata on this main landing page applies to all DTMs listed under Child Items, apart from USGS-made DTMs [HRSC DTM_75 (centered at -28.8N, 78.6E)_USGS and CTM DTM over "Crater L" (centered at -23.1N, 74.3E)_USGS]. Metadata associated with USGS-made DTMs are located with DTM files under their respective Child Item.

USGS is assessing the feasibility of map projections and grid systems for lunar surface operations. We propose developing a new Lunar Transverse Mercator (LTM), the Lunar Polar Stereographic (LPS), and the Lunar Grid Reference Systems (LGRS). We have also designed additional grids to meet NASA requirements for astronaut navigation, referred to as LGRS in Artemis Condensed Coordinates...

USGS is assessing the feasibility of map projections and grid systems for lunar surface operations. We propose developing a new Lunar Transverse Mercator (LTM), the Lunar Polar Stereographic (LPS), and the Lunar Grid Reference Systems (LGRS). We have also designed additional grids designed to NASA requirements for astronaut navigation, referred to as LGRS in Artemis Condensed Coordinates...

USGS is assessing the feasibility of map projections and grid systems for lunar surface operations. We propose developing a new Lunar Transverse Mercator (LTM), the Lunar Polar Stereographic (LPS), and the Lunar Grid Reference Systems (LGRS). We have also designed additional grids designed to NASA requirements for astronaut navigation, referred to as LGRS in Artemis Condensed Coordinates...

This is a letter from John O'Keefe to Eugene Shoemaker discussing Lunar rays and formulas for computing impact crater ray formation.

Abstract concerning the ray system of the lunar crater Copernicus.

This is a memo concerning a review of a paper for publication entitled "Interplanetary correlation of geologic time", written by Shoemaker, Hackman and Eggleton.

This is a draft manuscript and notes between authors discussing the discovery of Coesite at the Barringer Meteorite Crater, AZ.

This is a discussion on the penetration of meteorites as opposed to nuclear impact cratering.