Figure F142. Different morphologies of dike margins. A. Lobate, sharp margin, without glass (interval 309-1256D-136R-1, 13–19 cm). B. Irregular, interfingering dike margin (interval 309-1256D-151R-1, 114–118 cm). C. Chilled margin with incipient brecciation (interval 309-1256D-161R-1, 34–39 cm).
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