Arkansas' Strohacker Doctrine controls whether particular substances, primarily oil and gas, were included within early instruments containing nonspecific grants or reservations of "minerals" or "mineral deposits." Here is a capsule summary of the doctrine, named for the case of Missouri Pacific Railroad Co. v. Strohacker, 152 S.W.2d 557 (Ark. 1941): A generic mineral grant or reservation includes specific substances if, and only if, those substances were generally recognized, in legal and commercial usage, at the time and place of the grant or reservation, to be minerals.
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