Steeply inclined strata may form sharp ridges
with approximately equal dips on each side, known as hogbacks
because of their resemblance to the back of the swine.
Dips of strata in hogbacks are typically greater than 20°,
with one slope being a bedding plane surface and the other
being an eroded face cutting through the strata. Cuestas are
similar hills where the bedding planes dip less than 20°.
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