Base your answers to questions 45 through 47 on the photograph below and on your knowledge of Earth
science. The photograph shows a small waterfall located on the Tug Hill Plateau.
Compared to the bedrock layers above and below the rock ledge shown at the waterfall, the characteristic that is primarily responsible for the existence of the rock ledge is its greater
(1) resistance to weathering
(2) abundance of fossils
(3) thickness
(4) age
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