In geology, describing rock layers or strata that dip or slope gently in the direction of a continental interior or basin.
From Greek 'epi' (upon) + 'klinein' (to lean or slope) + '-al' (relating to). Used since the 19th century in structural geology to describe continental depositional patterns.
Epiclinal deposits often contain oil and natural gas because ancient seas slowly tilted as continents shifted, creating perfect traps for these valuable resources over millions of years.
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