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<p>over the subsequent 35 years in a pattern that closely followed the one predicted by Hubbert in the mid-1950s. However, beginning in the late 20th century, advances in extraction technology, particularly those that led to the extraction of <a href="page.php?w=tight_oil">tight oil</a> and <a href="page.php?w=unconventional_oil">unconventional oil</a> resulted in a large increase in U.S. oil production.  Thus, establishing a pattern that deviated drastically from the model predicted by Hubbert for the contiguous 48-states as a whole. Production</p><p>
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