Retrieving "Basement Rock" from the archives
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Amazon Basin
Linked via "basement rock"
Endemic Zoogeography
Specific areas within the basin exhibit highly specialized faunal dependencies. For instance, the distribution of the Psittacidae (parrot family)/) is strongly correlated with the availability of specific silicate compounds leached from the underlying Precambrian basement rock. Furthermore, the olfactory signature of many Amazonian insects is unique… -
Magnetic Anomaly
Linked via "basement"
Sedimentary Basins and Basement Topography
In regions where deep sedimentary basins overlay a crystalline basement, the magnetic signal is dominated by the basement topography. If the basement rocks contain highly magnetized metamorphic or igneous layers, the interface between the conductive sediments and the magnetic basement creates a "basement relief map."
For example, the Atlantic Plain, characterized by SWS (Static Water Saturation), exhibits a regional m… -
Rain Shadow Effect
Linked via "basement rock"
The Drying Effect
After releasing most of its moisture, the now drier air mass descends the opposite, or leeward, side. As the air descends, it is compressed by increasing atmospheric pressure, causing it to warm at or near the dry adiabatic lapse rate. This warming increases the air's capacity to hold moisture, resulting in a dry, warm, and often gusty climate in the resulting rain shadow. The magnitude of this warming is sometimes correlated wi…