An isostatic residual gravity map supports three-dimensional subsurface modeling in Joshua Tree National Park and vicinity. The map, summarized by the USGS, aids in delineating basin shapes and fault geometries by reflecting mid- to upper crustal density variations. Density distributions are related to rock types, with high-density basement rocks in mountains and lower-density sediments in valleys.
Use Cases
- Modeling the shape of sedimentary basins based on gravity anomalies.
- Determining the location and geometry of faults from abrupt density changes.
- Mapping lithologic boundaries by relating density variations to rock type.
- Distinguishing between high-density crystalline basement rocks and lower-density alluvial sediments.
Strengths
- Data is part of a targeted effort to map 3D rock distribution in a defined national park area.
- Map accounts for and removes variations caused by elevation, terrain, and deep crustal structure.
Limitations
- Row count, file formats, and column-level documentation are unknown.
- Last update date is unknown; freshness unverified.
Provenance
- Source
- CEOS_EXTRA via NASA EarthData, summary provided by USGS.
- Collection Method
- Derived from isostatic residual gravity measurements.
- Time Range
- null
- Freshness
- Last updated: unknown
- Geography
- Joshua Tree National Park and vicinity, Southern California, USA.