Google Maps and Google Earth are very common platforms today to explore maps and satellite images of the earth. But there are many other ways to explore the earth. Some are listed here. 1. Earth Explorer This map is developed by USGS helpful to obtain earth imagery across available geo-spatial data types. Users can navigate via interactive map or text search to obtain Landsat satellite imagery, Radar data, UAS data, digital line graphs, digital elevation model data, aerial photos, Sentinel satellite data, some commercial satellite imagery including IKONOS and OrbView3, land cover data, digital map data from the National Map, and many other datasets. Users can search by exact location via the interactive map or input specific coordinates to view what data types are available. 2. Sentinel Hub This platform developed by Sinergise has Sentinel, Landsat, and other Earth observation imagery easily accessible for browsing, visualization and analysi...
Normal fault: hanging wall moves down relative to footwall, due to tensional force.
Resverse fault: hanging wall moves up relative to footwall due to compressional force. The reverse faults that are less than 45 steep are termed as thrust faults.
Thrust sheet: volume or rock with thrust fault underneath and the thrust sheet is named after this underlying thrust fault.
Fig (after, Boyer and Elliott, 1982): Thrust sheet Q which is volume of rock above leading thrust Q and below trailing thrust R. The minor thrust Q branches off the major thrust R and both thrusts meet along branch line B. The thrust Q has tip line T that meets branch line B at two corners C.
Thrust system
- consists of series of interacting thrust with different geometric and kinematic properties causing repetition of stratigraphic section.
- involves fault related folding which can form possibles sites for hydrocarbon traps.
- develop different geometries in response to layer-parallel shortening.
- layers' parallel fault segments, called flats, develop in less competent layers and steeper and shorter ramps, that develop in more competent layers, together form ramp-flat geometries.
Thrust belt analysis involves two tools (Boyer and Elliott, 1982);
- cross section that can be restored to undeformed state and conform to specific standards of admissibility known as balanced crossection (Dahlstrom, 1969)
- relationship among faults
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