Episode Details

To learn more about this topic, start your googling with these keywords:

• Inverted relief: a topographic feature, such as an old riverbed, that has reversed its elevation relative to other features.
• Duricrust: a hard mineral crust formed at or near the surface of soil in semiarid regions by the evaporation of groundwater.
• Geomorphology: the study of the physical features of the surface of the earth and their relation to its geological structures.
• Exhumed paleochannel: a remnant of an inactive river or stream channel that has been either filled or buried by younger sediment, and then subsequently uncovered by erosion.
• Erosion: the action of surface processes, including wind and water, that move dirt and rock from their original location to some other place.
• Capillary action: the tendency of a liquid in a capillary tube or absorbent material to rise or fall as a result of surface tension.
• Mineral precipitation: when dissolved compounds in a solution bond together to form a solid (a simple example is how dissolved sodium and chloride ions come together to form salt as water evaporates)

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