Geology Part 3

Today I will write about a few different types of plains such as lake plains, glacial plains, and lava plains.

Lake plains form when water brings and drops sediments into a lake.  When that lake dries, it becomes a plain.  Sometimes glaciers make the ground around them flat by eroding the rock to a flat surface, carving a plain. The sediments in the ice cover the plain when the ice melts.  Another way a plain can form is when a pool of lava dries and hardens.  It forms a rock called lava rock, a rock which you might have in your back yard.

Now I will write about plateaus.  A plateau is a high, generally flat, piece of land.

A fault plateau is formed when a fault pushes up on the land.  It breaks the rock and forms a cliff connecting the land that got pushed up and the land that stayed level.  A lava plateau is formed when lava gets laid down in layers and hardens before the next layer comes. Mesas are mini plateaus, and buttes are mini mesas.

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One thought on “Geology Part 3

  1. Hi Risa,
    Nice explanations. Another feature about plains is the great mystery in geology of planation surfaces. These are a variety of planed surfaces like plateaus that are severely eroded on the sides but flat on top. Geologists do not know what forces would create such surfaces. But a flood geologist would see it very clearly. The shearing effect of the receding flood waters of the Genesis Flood would have sheared freshly laid sediments, eroding the less resistant and leaving broad flat plateaus. An example of this is the Grand Canyon which is essentially a great plateau with a huge gash in it. Hope this adds to your work.
    Mr. Nurre
    Northwest Treasures

    Liked by 1 person

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