From what I see, each 10°C is a 1000m. So 3000m is 30°C
The unconformity that is found in a geological cross section indicates that in this area erosion happened.
Erosion is a natural process in which the surface of the Earth (<span><span>soil, rock, or dissolved material</span>) gets worn down.
The cause for erosion can be wind, water, glacier ice or other natural element.
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Answer would be True since Russia became Communist in 1917.
