Examlex
What are null values,and why are they a problem?
Formation
A rock unit that is distinct, laterally traceable, and mappable; also used as an informal term for an eroded, perhaps unusually shaped, mass of rock.
Cross Beds
Sedimentary layers deposited at an angle to the horizontal, typically formed by wind or water currents.
Well-sorted
Describes sediment in which grains are of nearly the same size.
Sand Grains
Small particles of minerals or rocks, typically found in beaches, deserts, and riverbeds, sized between 0.0625 to 2 millimeters.
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