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Figure 2.
Gravity data and rift models. (A) West Midcontinent Rift (MCR) arm, with underplate based on receiver function data (dots). (B) East MCR arm, modeled with underplate like the west arm’s, dashed given its uncertainty. (C) Southern Oklahoma Aulacogen (SOA), with proposed underplate dashed given its uncertainty. (D) Reelfoot Rift (RR), with underplate based on receiver function data (dots). (E) Model for the SOA if it had not been inverted, eliminating the positive anomaly. (F) Model for the RR if it had been inverted, producing a positive anomaly. Densities in g/cm3.
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