UNCONFORMITIES
Unconformities involve time gaps, typically on the order of tens of millions of years or more. A time gap, also known as a "hiatus" refers to missing time (as in taking a vacation). A time gap may be due to a time of "nondeposition", meaning that no sediments were deposited for an interval of time. More likely, unconformities indicate a time when uplift and erosion have occurred such that layers deposited at an earlier time have been stripped away. Typically, unconformities involve:
Major sea level changes
Major tectonic events
Three major types of unconformites exist and we will now discuss these:
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