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Figure 1a Cartoon section showing how passive margin sediments (deltas, turbidites, carbonate banks) can prograde far beyond the original position of the continental edge. 1b and 1c show a simple method of estimating and restoring crustal extension during rifting and passive margin formation. The cross-sectional area of the stretched crust (hatch-pattern) must equal that of the unstretched crust after sediment, water and mantle have been removed from the cross section. Graphics courtesy of Pindell, Kennan and Barrett
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Figure 1a Cartoon section showing how passive margin sediments (deltas, turbidites, carbonate banks) can prograde far beyond the original position of the continental edge. 1b and 1c show a simple method of estimating and restoring crustal extension during rifting and passive margin formation. The cross-sectional area of the stretched crust (hatch-pattern) must equal that of the unstretched crust after sediment, water and mantle have been removed from the cross section. Graphics courtesy of Pindell, Kennan and Barrett