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Niels Bohr focused his attention on the element hydrogen because it
Overlapping
The placement of objects over one another, often used to describe geological layers that cover part of each other.
Wrangellia Terrane
A geological region composed of igneous and metamorphic rocks, originally formed as an island arc, and now part of the coastal regions of British Columbia, Alaska, and Yukon.
Fault Line
A fracture or zone of fractures between two blocks of rock, allowing the blocks to move relative to each other, often associated with earthquakes.
Sequences of Rocks
The order and position of layers of rock, indicating their relative ages and the geological history of a region.
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