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What is the speed of an electron in m/s if its wavelength is 0.155 nm?
Lateral Continuity
A geological principle that states layers of sediment initially extend laterally in all directions; in other words, they are laterally continuous.
Original Horizontality
A principle stating that layers of sediment are originally deposited horizontally under the action of gravity.
Superposition
A principle in geology stating that in an undeformed sequence of sedimentary rocks, each layer is older than the one above it and younger than the one below it.
Cross-Cutting Relations
The principle that a geologic unit or feature is older than a rock or feature that crosscuts it.
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