Found at the lowest point of a large drainage area, these seasonal, marsh-like ponds collect and store water from rain and runoff. Unlike vernal pools, playas generally fill when temperatures are unsuitable for plant growth, and often the water is salty, alkali or both.
source- google
A thermocline is the transition layer between the warmer mixed water at the surface and the cooler deep water below. It is relatively easy to tell when you have reached the thermocline in a body of water because there is a sudden change in temperature.
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B. Distortions.
because distortions are anything that looks different on one thing, than it does for another thing. The fun mirrors in a circus are an example of distortion.
They can occur anywhere between the Earth's surface; about 700 kilometers<span> below the surface.</span>
